Raw Therapee Basics: The Lab Adjustments Photo Editing Tutorial - LONG VIDEO 😂

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  • เผยแพร่เมื่อ 14 พ.ค. 2020
  • Raw Therapee Basics: The Lab Adjustments Photo Editing Tutorial
    My Exclusive Membership Site: bit.ly/2SwaSZ6
    Raw Therapee Lab Adjustments are very powerful and extensive. Contents Timestamps list below:
    What is L*ab? 01:30
    L*ab & HSL in Lightroom 03:00
    RawTherapee HCL in L*ab 09:30
    RawTherapee Edit Workspace 13:40
    RGB vs L*ab in RawTherapee 15:00
    Restrict LC to Red & Skintones 19:10
    Full Image Process - Dragonfly 24:10
    "Killer L*ab LH & CH Equalizers 37:45
    Full Image Process - Landscape 42:30
    Thinking Outside the Box Grad Filter 44:10
    The L*ab HH Equalizer 51:00
    Stupidly Simple Photoshop Trick to Finish 54:45
    #rawtherapee #Lab #labadjustments

ความคิดเห็น • 114

  • @AndyAstbury
    @AndyAstbury  4 ปีที่แล้ว +18

    🤓😎I know this is one long video, but there are a lot of different and somewhat unfamiliar terminologies and adjustments to go through - rushing this is of NO BENEFIT to ANYONE.😎🤓

    • @Lenhakas
      @Lenhakas 3 ปีที่แล้ว

      I really agree mate!! I'm thankfull for the time you took to explain everything several times in different ways and with different examples. It felt like a masterclass!!!

  • @PerEng2405
    @PerEng2405 2 ปีที่แล้ว +2

    This LAB video revealed a whole new dimension in color management in Rawtherapee to me. It also illustrated the difference and similarities between LAB, HCL and RGB. Thank you very much Andy. br, /Per

    • @AndyAstbury
      @AndyAstbury  2 ปีที่แล้ว +1

      Many thanks for that comment Per 🍻🍻

  • @jhmnieuwenhuis
    @jhmnieuwenhuis 2 ปีที่แล้ว +2

    Excellent explanation. One can see that Your knowledge is not only theoretical but also
    build on experience and thats real knowledge !
    Learned a lot today.
    I probably watch this video a few times more...

    • @AndyAstbury
      @AndyAstbury  2 ปีที่แล้ว

      Cheers Hans 🍻🍻

  • @BushwhackingPhotography
    @BushwhackingPhotography 3 ปีที่แล้ว +2

    Thank you so much for these videos. I'm a beginning photographer, about a year and a half, and have been using Rawtherapee from the start. I've learned more from your videos in the past two weeks than I have the entire year and a half.

    • @AndyAstbury
      @AndyAstbury  3 ปีที่แล้ว +2

      You're very welcome, glad they are helping!

  • @guilhermeaugustolananonato6180
    @guilhermeaugustolananonato6180 3 ปีที่แล้ว +2

    Amazing that you put this much effort in something for a bunch of strangers. Thank you so much for the video.

    • @AndyAstbury
      @AndyAstbury  3 ปีที่แล้ว

      My pleasure 🍻🍻 And if there is something specific you would like a video on then please let me know 👍

  • @GXVIPER
    @GXVIPER 4 ปีที่แล้ว +4

    what Ive found from a quick test -Exposure tab drawbacks as opposed to LAB:
    Lightness slider = causes Desaturation
    Contrast Slider = causes Saturation
    Saturation Slider = generally worsens it (overpowering and adds noise, possibly affects both contrast & lightness)
    with chromaticity Ive found you can even reach the point of saturation 'clipping' on a red tshirt for example and the rest of the image still looks ok overall. I will definately be using these tools from now on , thanks!

    • @AndyAstbury
      @AndyAstbury  4 ปีที่แล้ว +2

      You're welcome 👍 The drawbacks you mentioned are down to the fact that the adjustments you mentioned are RGB. This weeks video (up tomorrow) is a simple explanation of why RGB colour model adjustments in RAW are not as good as Lab, XYZ, HSV etc.

  • @mypoi7861
    @mypoi7861 3 ปีที่แล้ว +1

    I just love these videos, thank you so much. I keep revisiting them simply to get my head around the complexity and the richness of the information contained within. Now that I can log in I will be liking them all!

    • @AndyAstbury
      @AndyAstbury  3 ปีที่แล้ว

      Glad you like them🍻🍻

  • @daniellebentley9207
    @daniellebentley9207 3 ปีที่แล้ว +2

    Thank you so much for creating all of these wonderful tutorials. I feel like I have progressed so rapidly in knowledge and skill thanks to you!

    • @AndyAstbury
      @AndyAstbury  3 ปีที่แล้ว

      Thank you very much Danielle 🍻👍

  • @rodbotic
    @rodbotic 4 ปีที่แล้ว +3

    Awesome explanation of Lab. That panel was a complete mystery.
    I have been wanting to play with split toning, but was uncertain how before. Now I know. I can't wait to start tinkering.

    • @AndyAstbury
      @AndyAstbury  4 ปีที่แล้ว +2

      Cheers 🍻🍻 If you want to change from split toning on steroids to split toning on a mix of crack and LSD then play with the a & b channels combined with RGB Curves under the colour tab!

  • @Eigil_Skovgaard
    @Eigil_Skovgaard 3 ปีที่แล้ว +1

    This video is extraordinary well done. I think I have watched it three times by now to get the idea with these curves and equalizers into my head. That's because I am slow. For Andy's explanation is very clear and presented in a convenient tempo. This makes the over all troublesome learning of the RawTherapee virtues a lot easier. Thank you, Andy, for putting all this energy into the education of the relatively small RT flock - so far, that is.

    • @AndyAstbury
      @AndyAstbury  3 ปีที่แล้ว

      Cheers Eigil, and I think you will enjoy this weeks video 🍻👍

  • @atephoto
    @atephoto 3 ปีที่แล้ว

    Cool cat with a lot of knowledge. Thanks. I found RawTherapee because of you, and thanks to you I'm now using it side by side with Lightroom and Capture One just for fun. 🍻 I initially hated the bad performance, but setting up "Tiles pr thread" on all the options and using your first RawTherapee video, it is now almost as smooth as my Lightroom!

  • @-OzSteve
    @-OzSteve 4 ปีที่แล้ว +1

    I'm loving your in depth RT tutorials. Keep it up !

  • @sin2099x
    @sin2099x 4 ปีที่แล้ว +2

    Another great video Andy! My editing skills are expanding thanks to you! Thanks!

    • @AndyAstbury
      @AndyAstbury  4 ปีที่แล้ว

      Cheers, glad I'm helping Jorge 🍻

  • @mastert217
    @mastert217 4 ปีที่แล้ว +2

    well done explaining that lab panel. I learned things i didn't even know i wanted to learn. I don't mind long videos that have this much information. Thank You. ......Subscribed

    • @AndyAstbury
      @AndyAstbury  4 ปีที่แล้ว

      Thanks a lot for that - I always get a little paranoid when I record a video only to find I've been talking for an hour 🍻👍

  • @gbdr_ps_fan8656
    @gbdr_ps_fan8656 4 ปีที่แล้ว +1

    Hi Andy. Many thanks for the video. If at all, the length of it is just an additional asset. Great explanation and insight into the power of Lab. Looking forward to your take on wavelets. Thanks and stay safe. Greg.

    • @AndyAstbury
      @AndyAstbury  4 ปีที่แล้ว

      Cheers Greg 🍻🍻

  • @dunnymonster
    @dunnymonster 4 ปีที่แล้ว +1

    The range of adjustments here is limitless! Very interesting tutorial Andy and a great look into RT's flexibility.

    • @AndyAstbury
      @AndyAstbury  4 ปีที่แล้ว

      Cheers buddy, glad you liked it 🍻🍻

  • @phillellis9496
    @phillellis9496 2 ปีที่แล้ว +1

    Great Video. Yes it' long(ish). Some stuff unfamiliar. Who's rushing?, It's TH-cam, go round again and pick up a little more each time. There's no end to learning.

  • @kolkmeiester
    @kolkmeiester 5 หลายเดือนก่อน +1

    Wow! your video was amazing and really helpful to understand how to start using this tool. Thank you!

    • @AndyAstbury
      @AndyAstbury  5 หลายเดือนก่อน

      Glad it was helpful!

  • @PeterLavender
    @PeterLavender 4 ปีที่แล้ว +3

    Hi Andy, thanks for the run through on the Lab module. The length didn't bother me at all, and we even had a visitor drop in, the noise cancelling headphones worked perfectly! :) Your videos on Rawtherapee have been a great resource even as a long time Rawtherapee user, which I'll admit, I used to use for 100% of my raw development, rarely moving any image into Gimp (since I'm 100% on Linux) for further processing. These days though I'm using both RT and darktable interchangeably, as I want to learn more about DTs masking tools.
    I'm staggered with how much I don't know, but to be honest, I've learnt enough to get the image to the point that I like and then it's published to where ever I have a social media outlet.
    Thanks again for the great detail in your videos.

    • @AndyAstbury
      @AndyAstbury  4 ปีที่แล้ว +2

      Thanks Peter 🍻👍 On the masking bit, the ART fork has the same masking as darktable, but you must understand that this is 'area' masking (like Lr and CapOne). The masking you see me do in Photoshop isn't always area masking - it's channel and luminosity masking - ie tone or colour based pixel accurate masking - a different beast altogether, and more sophisticated in every way.

  • @waynesutton7381
    @waynesutton7381 4 ปีที่แล้ว +1

    Thank you for another excellent RT tutorial Andy, please keep them coming!

    • @AndyAstbury
      @AndyAstbury  4 ปีที่แล้ว +1

      You're welcome Wayne 👍 Is there anything specific you want me to cover?

    • @waynesutton7381
      @waynesutton7381 4 ปีที่แล้ว +1

      @@AndyAstbury I'd certainly be interested in seeing something on the tone mapping module and its usefulness compared to other possibilities for lifting dark areas and bringing out detail.

  • @KristinaNedzvetskaya
    @KristinaNedzvetskaya 3 ปีที่แล้ว +1

    Thank you, that was very helpful!

  • @markrigg6623
    @markrigg6623 4 ปีที่แล้ว +2

    An hour long vid of yours was just what the doctor ordered after a long day at work and I'm about to watch for the second time. So thanks again and please keep 'em coming. Have you made a decision about your Iceland trip yet?

    • @AndyAstbury
      @AndyAstbury  4 ปีที่แล้ว +1

      Crikey Mark, my wife gets depressed if I talk to her for more than 15 seconds 😂 Cheers buddy🍻 We've officially put the Iceland trip back to 2021, sometime in August.

  • @CWMcDonald
    @CWMcDonald 4 ปีที่แล้ว +1

    Thanks for this one Andy. I always liked the idea of LAB in Photoshop but used it limited. I can see it being more useful in Rawtherapee.

    • @AndyAstbury
      @AndyAstbury  4 ปีที่แล้ว

      Cheers🍻 Lab on a rasterized image never really made much sense to me in over 20 years, but in raw I'm amazed at the results myself!

  • @Eigil_Skovgaard
    @Eigil_Skovgaard 3 ปีที่แล้ว +1

    RT is comparable with an oil refinery. Raw oil is put in at one side and then it passes through several departments, while the chief technician is supervising the refining process. He is everywhere and en passant he loves to adjust one or two of the thousand handles, until he finally reach the last phases of the process. This is his domain, and he knows every corner of it. The only problem for the outside world is, that therapy is closing in on your sanity before a single liter of petrol shows up at the outlet.

    • @AndyAstbury
      @AndyAstbury  3 ปีที่แล้ว

      😆😀 Eigil, your analogy is hilarious - and oh so true! Believe me when I say, there are sections of RT that still make me feel that way too!

  • @Being_Joe
    @Being_Joe 4 ปีที่แล้ว +2

    Great Job. I love the Lab tools in RT and this is a great explanation. I picked up a handy trick for when you are working with the a or b curves. If you add a point right in the middle of you curve you can then make slight adjustments to either side of the curve without making too drastic of a color shift. It is nice for fine tuning you images. You are right though, I do not like the workflow for working with Lab in Photoshop, filters don't all work, and things get lost if you switch back to RGB. A cool feature in Affinity Photo and PhotoLine is you can switch your curves to work in Lab mode without changing your document to the Lab color space. I really with PS had that feature, though I wish all three apps could just steal a bunch of each others features (one can dream).

    • @AndyAstbury
      @AndyAstbury  4 ปีที่แล้ว +1

      Cheers Jose 🍻🍻 In my dreams Adobe would rip the entire dev module out of Lightroom and replace in with RT - just imagine seamless 300ppi integration with Ps of RT Smart Objects to give full 32bit float edits in Ps 😍😍

    • @Being_Joe
      @Being_Joe 4 ปีที่แล้ว

      @@AndyAstbury If RT was licensed under GPLv2 they could do that as long as they kept any modifications to the RT code open source while still keeping their other code closed. I believe GPLv3 is a lot more restrictive than that. Now if RT was licensed under a BSD or MIT license then Adobe could take any part of the code do what they wish and decide if they wanted to contribute back to the RT community (it is usually to their advantage). A lot of open source software has corporate sponsorship in the the sense that work on the code and ship some changes back to the community. Apple's OS X started using a lot of the FreeBSD components and a lot of the macOS kernel developers contribute back to FreeBSD. Had this software been licensed under a different license I could picture a scenario where camera companies could fork RT into a version that best supports their cameras similar to how Fuji and Nikon have a version of SilkyPix just for their cameras. If there were a commercial version of RT with some additional proprietary features (modules if you would) I would pay for that. Imagine having full time developers working on this app and the features they could implement?

  • @atachualpas
    @atachualpas 2 ปีที่แล้ว +1

    Exceptional explanation of LAB!

  • @artemmelnik7965
    @artemmelnik7965 4 ปีที่แล้ว +1

    When I worked in a print shop I used to do this RGB to Lab conversion a lot - even if it looks destructive it is not as destructive as an RGB to CMYK :((( I must admit that I had a vague understanding of what am I doing, but Lab to CMYK was a bliss, corrections in Lab were amazingly easy and effective, there was basically no way of achieving the desired print colors neither in RGB nor in CMYK itself no matter how hard you try, but Lab magically transformed everything by moving those curves just slightly. I am not even talking about the quality of unsharp mask that only Lab can achieve - though it was back in the previous century and I hope the technologies made an advance since then (of course not)

  • @stopcam.iso_1
    @stopcam.iso_1 2 ปีที่แล้ว +1

    Keeping doing it good sir

  • @billhandley3980
    @billhandley3980 3 ปีที่แล้ว +1

    Brilliant. Thanks.

  • @artxagoraris3525
    @artxagoraris3525 3 ปีที่แล้ว +1

    Great lesson thank you

  • @billlewisjr6699
    @billlewisjr6699 4 ปีที่แล้ว +1

    Great video yet again. Took me a while to get through this one. I am not a huge fan of Lab but it does have uses that no other tool can do so I tend to only use it when needed. If not careful Lab can cause some issues. As for your rhetorical Photoshop question... Sadly not everyone can use Photoshop particularly the Linux guys but my take on it if your OS can run them if you are not using Photoshop or Affinity you are severely hindering yourself. Adjustment layers + advanced masking are king. I have been gravitating towards Affinity to be honest they are doing some really amazing stuff. It is tough to relearn though. Sure it looks like Photoshop but the workflow is quite different.

    • @AndyAstbury
      @AndyAstbury  4 ปีที่แล้ว

      Cheers Bill🍻🍻 Lab in RT surprised me at being issue-free, unlike in the traditional Photoshop Lab which, as I said, I have never got on with. Obviously, if you push things too much things will go pear-shaped!

    • @billlewisjr6699
      @billlewisjr6699 4 ปีที่แล้ว

      @@AndyAstbury I think the advantage of RT here is the advanced controls that utilize HCL with LAB. Most software only gives you L, A, and B curves which can cause all sorts of odd unwanted Hue shifts and artifacts if you are not super carful in balancing out the curves. Having the control over the LAB/HCL crossover helps compensate for the deficiency in pure LAB. That is not to say that RGB does not have its own issues which it does in the Saturation department. It also helps we are working on the Raw level and not the Pixel level.

  • @panagiotisdalagiorgos1573
    @panagiotisdalagiorgos1573 4 ปีที่แล้ว +1

    Hello Andy, I recently discovered your channel, and i have to say, i learned quite a lot, especially about rawtherapee, which I love and use. If you plan to show any more features of it in the future, is it possible that you could do it with a portrait photograph? I'm fairly new to photography and I'm still exploring the different genres.

    • @AndyAstbury
      @AndyAstbury  4 ปีที่แล้ว +1

      I'll have to dig around in my old files to find one as I don't shoot them normally but I'll see what I can come up with!

    • @panagiotisdalagiorgos1573
      @panagiotisdalagiorgos1573 4 ปีที่แล้ว +1

      @@AndyAstbury yeah I noticed, I also like wildlife, landscape, and (maybe my favourite) macro, but for those I pretty much have a good idea about the editing process, and much of it is thanks to your videos. I'm looking forward to your new videos, have a nice day!

  • @OlegKorsak
    @OlegKorsak 4 ปีที่แล้ว +7

    would be cool to have masking for all these adustements

    • @dpenn555
      @dpenn555 3 ปีที่แล้ว

      Oleg Korsak Take a look at ART it’s a fork of Rawtherapee which includes masking

  • @stevefeder1410
    @stevefeder1410 2 ปีที่แล้ว +1

    A picture is worth a 1000 words - here we have 30 pics a second - a bit long in the tooth to get to the sections that demonstrate how to use these components, but my attempts to understand how to use the L*a*b groupings by myself (and in conjunction with the RGB section) were dwarfed by watching the manipulations done in the tutorial. The result will very likely be a lot less frustration and a lot more productivity when I experiment with these controls.

    • @stevefeder1410
      @stevefeder1410 2 ปีที่แล้ว

      Andy - I've been experimenting and a number of times my mask ends up the exact reverse of what I am looking to achieve. So, while I am trying to figure out what I am doing in reverse is there an way to inverse a mask as it's essentially a selection?? I haven't seen any. Thx.

    • @AndyAstbury
      @AndyAstbury  2 ปีที่แล้ว

      Yeah, I know, it's freaky! But once you understand that 'yellow' IS effected and that 'transparent' is the new black then you'll be fine! It's stupidity beyond belief and it's what comes of not consulting people like me before developers build anything - crazy. But in the grand scheme of things it doesn't detract from how powerful the tools are.

  • @claudia4705
    @claudia4705 ปีที่แล้ว +1

    Hi Andy, I've really been appreciating your tutorial videos about rawtherapee. I'm a beginner who learns by ownself, I've started for a year to use rawtherapee to develop my raws and your tutorials were really useful (despite that I'm still a sucker), but I'm struggling on finding something about black and white, I'm searching especially how recreate the complexity of the black/gray tones. thank you for your work. kisses p.s. Sorry for my English, I'm trying to learn, but the way is hard and tricky!!!

    • @AndyAstbury
      @AndyAstbury  ปีที่แล้ว

      Thank you Claudia, and don't worry about your English - it is fine 😍 I have always done my B&W work in either Photoshop with Nik Silver EFEX, or sometimes Lightroom. Not got around to trying DarkTable for B&W yet, but with RT I find it hard to get the 'richness' of darks together with a good spread of grey tones - at the end of the day, B&W processing of a raw file in RT always - to me - gives a result that's a little dull and flat.
      But it is something I'll have another look at, once I've got around to checking B&W in DT.

    • @claudia4705
      @claudia4705 ปีที่แล้ว

      @Andy Astbury thank you for answering me, I'll wait for your next tutorial about black and white, whatever tool you'll decide to use to do it!

    • @AndyAstbury
      @AndyAstbury  ปีที่แล้ว

      Have you watched this one Claudia th-cam.com/video/xJu9ICMA_ok/w-d-xo.html - I know it's not RT or DT, but the general idea is the same in any raw processor.

    • @claudia4705
      @claudia4705 ปีที่แล้ว

      @@AndyAstbury Hi Andy, I watched the video that as usual it was really interesting, I still need to watch it a couple of times or more for a deep understanding, but I think that it was what I needed that is how light, tones and colours affect black and white conversion. I found a free version of silver efex, the old google version, so I'll try to applic what I've understood from the video. Andy thank you very much!

    • @AndyAstbury
      @AndyAstbury  ปีที่แล้ว

      You are most welcome Claudia.

  • @RamazanKamari
    @RamazanKamari 4 ปีที่แล้ว +1

    Wonderful presantion.

  • @FrankEtchells
    @FrankEtchells 4 ปีที่แล้ว +1

    Sorry 'Prof'... bit late to the party with this one - been otherwise engaged with things other than photographic 😊
    Got to say my head hurts from all the info you covered in this one - and with the additional info from the discussions with others in the comments. Brilliant to see and read though. I did wonder - at one point - if the video could have been broken in to two or three shorter ones - *at one point* 😉 - but saw the reason for continuation for a longer tutorial. Shorter would have lost the continuity thread even if posted as a group for watching.
    and *Many Congratulations* on the new subscribers to the channel ✔🍾👍

    • @AndyAstbury
      @AndyAstbury  4 ปีที่แล้ว +1

      Thanks muchly Frank 🍻🍻 Yes, I decided a few months ago to stop stressing over video length after the fantastic viewer feedback I was getting - only 25% of viewers watch to the end though, even though I do put the vid length at the beginning! But as you say, if I break them up I loose continuity, and if I make them short then you'll only get half the info - unless I talk faster, and from feedback folk don't want that!

  • @matthewdeegan
    @matthewdeegan 2 ปีที่แล้ว +1

    Hi Andy
    Hot stuff….you put the Christmas lights on Rawpedia in terms of the road from knowledge to understanding to “know-how” learning skills for what is acknowledged as a complex application.
    I’ve been looking out for you for a year now…at last
    Matt Deegan

    • @AndyAstbury
      @AndyAstbury  2 ปีที่แล้ว

      Thanks for that Matt, good of you to say - cheers 🍻🍻

  • @allanegan253
    @allanegan253 3 ปีที่แล้ว +1

    Pure MASTER - tks for your in depth on Everything. A little deep for me right now BUT future?? I'll be back.

    • @AndyAstbury
      @AndyAstbury  3 ปีที่แล้ว

      Cheers Allan, very much appreciated🍻🍻

  • @stevefader5013
    @stevefader5013 2 ปีที่แล้ว +1

    Andy, I'm a novice in using Raw Therapee and I've just discovered your you tube channel. The program's feature list is blowing me away. In trying features (on my test folder) I was trying to determine if there was an option to select a specific color range to essentially create a mask for adjustment purposes. I selected the eyedropper feature and it seemed to apply the selected color patch to the entire photo. So, that didn't go well. I've tried to research the issue , but no joy so far. While I'm looking forward to reviewing your videos is there in fact a way to do this in RT w/o transferring the image to a program like photoshop? Thanks in advance.

    • @AndyAstbury
      @AndyAstbury  2 ปีที่แล้ว

      Hi Steve, check out my videos - 3 of them - on Colour Correction Regions - they should give you some useful tools.

  • @KuruGDI
    @KuruGDI 2 ปีที่แล้ว +1

    Not sure if Andy will read comment on an old video, but here we go:
    I don't think that _shadows_ , _midtones_ and _highlights_ is the correct term to use in eg. the CC or b* curves. In the CC curve you can adjust the displayed chromaticity based on chromaticity in the RAW file. You do not change chromaticity based on the lightness (that would be CL). Same with the b* curve. Blue and yellow may affect shadows and highlights because blue is more a dark colour and yellow is more a light colour, but you again do not change the blue-yellow value based on the lightness.
    It could very well also be that I'm entirely wrong and my train of thoughts went off the rail somewhere.
    EDIT: 46:45 is what I meant. CC is saturation based on saturation. I wouldn't call less saturated parts of the image "shadows" because I think the word describes lighting and not a colour (even though they may be linked).
    EDIT 2: 49:20 is another good example. "I don't really want to effect the brighter areas of the image". The LC curve does not apply changes based on the L channel. It changes the L channel in dependence on the chromaticity. On the one hand I think it's important to accurately describe how the tool works so that if you want to adjust an image you know which tool you have to pick. On the other hand I also think that it's not that much a deal breaker. I would follow the words of Ian Hubert who said that if you move a slider and it looks good it doesn't matter whether you know how the slider works or not. Again: I could be terribly wrong with my thoughts here.

    • @AndyAstbury
      @AndyAstbury  2 ปีที่แล้ว

      I don't disagree with anything you say, but at the minute I'm struggling with relevance. Beginning at 49:20 I'm doing (on the image) exactly what I say! It's a luminance adjustment - flatten the curve towards highlights and the effect goes away. A standard L channel adjust is fundamentally LL, but here we are doing L adjustments based on C. Don't forget that the luminance of blue in lab terms is almost black. But reds and greens are a lot lighter - so an L adjustment based on C in Lab mode effects midtones and shadows in a totally different way to a standard L adjustment. But it's still an L adjustment and the outcome is hinted at by what lies up the y axis of the curve - a grey scale. To me, this is both what I say in the video, what you see in the image AND what you say above, so I'm struggling to understand why you bring it to my attention.
      But hey, I'm old and the brain aint as quick as it used to be so I'm most likely missing your point!

    • @KuruGDI
      @KuruGDI 2 ปีที่แล้ว +1

      @@AndyAstburyThank you for the reply. It's not often that you get an answer from the uploader on such an old video. :-)
      The relevance is based on which parts of the image the tool in RawTherapee will adjust.
      For 49:20: Yes, you change the luminance here. However, you changed the luminance not for the highlights, but for the most chromatic part.
      I'll try to explain this with an artificial image I created. It had a gradient in it that was going from black on the left to blue in the middle to white on the right. The middle of the image was pure blue and the minimum value on the b* channel (which seems to be -112.1 according to the Navigator that shows you the colour values).
      When you look at the lightness curve mand move the mouse from left to right, the vertical indicator line goes from low on the left to high on the right and does not reverse it's direction.
      When you look at the chromaticity curve and do the same thing, the indicator line goes from 0 to 9 in the middle and when you go over to the right the chromaticity drops back to 0 again. (The curve grid has 9 lines so I assume it's 0% to 100% with 10% increments. That it only hit's the 9th line looks like a bug). When you want to adjust the lower luminocity range (darker blue) and grab on to the chromaticity slider on the low end you will also effect the brighter parts on the right.
      From my point of knowledge I would say the change worked even though it was not the tool that was designed for this purpose. Like you could adjust saturation via the EXP comp even it works.

    • @AndyAstbury
      @AndyAstbury  2 ปีที่แล้ว

      I THINK I see where you are going with this buddy! Yes it's a luminance (L*) adjustment curve, and yes, the adjustment increases or decreases - let's call it brightness - according to how "saturated" (how much chromaticity) a colour is within the image. But the two curve end points are STILL relating to overall image brightness, so still relate to highlights and shadows. An adjustment upwards in the bottom half of the curve increases brightness of the more saturated colours in the areas where L is 50% or lower.
      If you want to use synthetic images - and there is nothing wrong with that at all, as I do it when teaching all the time - make a black document then draw a circle and fill it with 0,0,255 Blue. Then look at the L* value of the circle in comparison with the black background - you might get a surprise.........
      In reality, I would have used an LH adjustment instead, but I didn't because it's not a curve but an equaliser - and it doesn't function very well at all because it's quite prone to generating edge artefacts. The greens in the seaweed contain a lot of yellow, but a lift in yellow on an equaliser would increase the L* value of the yellows in the sky too, and leave me with NO way of removing them. So an LC curve was the next best thing to use because it allows me to lift the brightness of the more colourful areas in the image but then remove said adjustment in the very bright areas of the image which have more "chromaticity" - ie the yellow/orange areas in the sky. Whether or not the tool is functioning correctly is a little moot, that is indeed what it does.
      Pure yellow is L100, pure red is L60.6 so any oranges or yellowy highlights are going to be well up in the L90's, so tucking that curve back to a more linear position remove helps negate the curve effect in the brighter sky regions.
      Luminance based on chroma is governed by the colourfulness YES, but you have to take into account the way Lab colour classifies the L values of all those colours in the first place. It's been known to drive folk mad you know!

    • @KuruGDI
      @KuruGDI 2 ปีที่แล้ว +1

      @@AndyAstbury Thanks for the answer - which is about as long as one of your videos 😂
      In all seriousness: Thank you for the detailed explanation!
      The blue circle in the black image: The L value is ~30. Since the value goes up to 100 even the bluest blue is still rather dark. If I got you right this is was your point.
      The question is if RawTherapee may just lacks a good masking option to apply a change only to one area of the image. Have you heard about/ever tried "Darktable"? Combine RawTherapee with Darktables masks and you will blow Lightroom out of the water quite easily (from an image editing point of view)

    • @AndyAstbury
      @AndyAstbury  2 ปีที่แล้ว

      I've been banging on about drawn masks in combo with parametrics for a while now!
      But I'm more curious/concerned about your blue circle buddy! What program did you make it in, and what did you 'read' it in?
      If you made a 16bit TIFF in the prophoto rgb colour space - which is what I wanted you to do, if you don't have/use Photoshop/Lightroom then open the tiff in RT and select Prophoto as input,working and output BUT under output select Absolute Colourmetric as the rendering intent - THEN measure your blue!
      But in reality it's even worse!
      What you need to do is email me then I can send you a private video that might help with this! tuition@wildlifeinpixels.net

  • @ricardozettl6713
    @ricardozettl6713 4 ปีที่แล้ว +1

    Thank you very much for these in deep instructions, wich I never found or understood in RawPedia.
    I have to try that out to get some more experienced with this module.
    Please go on doing these tutorials, even if there is not so much public around, for the moment.
    What I always missed were profound tutorials about RawTherapee.
    I do 99% of my raw workflow in RawTherapee (see me on FLICKR). It is absolute exceptional that I go afterwards into GIMP. And if so, for other purpose than revealing. Means, with RawTherapee I am done! And very quick, even with 1.500 images.
    But: If I do so (going to GIMP via high bit TIFF), it will change me the colores. I think to remember a video, where you explain how to avoid that. Can you help me out: Which one was it?

    • @AndyAstbury
      @AndyAstbury  4 ปีที่แล้ว

      Thank you Ricardo 🍻 I detest GIMP but JUST FOR YOU I'll put it on my system and show you how to avoid the problem - GIMP by default desaturates colours and switches colour spaces on you if you are not careful!

    • @ricardozettl6713
      @ricardozettl6713 4 ปีที่แล้ว

      Oh, that´s far too much! I didn´t want to cause you so much trouble. Normally I´m done with RawTherapee. I use GIMP so seldom, that Photoshop doesn´t make any sens for me. May be your hate with GIMP comes from the former times when GIMP was kind of clumsy and did not work more than 8-bit colores. Since 1 1/2 years that has changed profoundly. Highest precision output in RawTherapee is Tiff 32-bit floating point and so does GIMP now, too. But the final Jpeg (8-bit) out of GIMP is different to the final Jpeg out of RawTherapee (example in my Flickt account, album "Valle del Yeso", las 3 pictures). I have some clues where the problem might be. Just a matter of time for investigating and trying out. I though you knew already. I have revised the case and now I think one of the problems is: It´s not enough to load a 32-bit float, you have to tell GIMP, that you want to work in that precision (menue: Image/Precision). Not every computer is capable to handle 3 pictures of 45MB Tiff 32-bit floating point at a time. I think, mine doesn´t. Confirmation pending, bevor I buy a computer that does. I haven´t checked so far, what happens with 2 RawTherapee Jpegs in and one GIMP Jpeg out. Other combinations pending for trying out. Thank you for all your efforts. I will ask the people from GIMP.

  • @alannortham255
    @alannortham255 3 ปีที่แล้ว

    I am just beginning with RAW Therapee and would like to know how to export the edited RAW file so I can import it to Affinity Photo.

    • @AndyAstbury
      @AndyAstbury  3 ปีที่แล้ว

      Hi Alan - either save the image, then open it in AP or find out what your system command line is to open AP then place that in the external editor command line box under the first tab of RT Preference - you can see me do this for Ps here th-cam.com/video/BKkp3m9ECU8/w-d-xo.html

    • @alannortham255
      @alannortham255 3 ปีที่แล้ว

      @@AndyAstbury When I try to save a file it wants so save it as ".pp3" format. I don't know what that file format is and/or it Affinity Photo will even open it. Also how can I save as a TIFF?

  • @Mike-br4tw
    @Mike-br4tw 4 ปีที่แล้ว +1

    Andy, you are always giving your best with these videos and you explain things so well. Looking at discuss.pixls.us, there seems to be many differing opinions as to which input profile to use. I went with "Camera Standard" only because I saw it being used in your videos. My old Nikon D5100 seems okay with it, but then again what do I know. Looking forward to more enlightening videos. Mike

    • @AndyAstbury
      @AndyAstbury  4 ปีที่แล้ว

      Cheers Mike🍻🍻 have to say 'be careful' over on the forum. I've been watching that thread just to see how far folk would go...and in all honesty it's bloody madness. The thread is based around the RT 'working profile' - not the 'input profile' (different beast) - and RT installs defaulted to a working profile of ProPhotoRGB.
      For those who are Lightroom users too, Lr colour management can't be changed, and is ProPhotoRGB (well, MelissaRGB in the GUI to be exact - the two are identical in all but gamma value). There are numerous reasons why the ProPhoto colourspace is used by raw converters, and one reason that it's fixed and unchangeable - so folk can't MESS SH*T UP!
      If you change the working space (the working profile) you can only change it to something as big and identical as/to ProPhoto; or something flipping smaller - and where on earth is the sense in that?
      ProPhotoRGB IS the largest industry-standard colour space in the world - anything else is either the same under another name, or smaller.
      To use a working space SMALLER than ProPhoto simply means that you are not retaining as much 'faithful' colour as your camera captured, and some of it is being dropped or altered by one rendering intent or another in order to make it all fit into said smaller space - total bloody madness.
      Of the three 'profiles' within any raw workflow by all means change the 'input' and 'output' profiles, but leave the damned 'working' profile alone - ProPhoto!
      As I'm sure you can tell, this is a 'hobby-horse' for me and something I'm likely to have a proper rant over somewhere sometime!

    • @Mike-br4tw
      @Mike-br4tw 4 ปีที่แล้ว +1

      @@AndyAstbury As per your warnings, I would not change the default working profile of ProPhotoRGB. Would using the "camera standard" input profile be okay or is that something that would require experimenting with. I just want to keep things as simple as possible. RT is complex enough. Mike

    • @AndyAstbury
      @AndyAstbury  4 ปีที่แล้ว

      Hi Mike - I was tinkering with the input profiles the other day researching for another video. You can switch the 'camera standard' to custom and load from your own camera, or even install a trial version of CapOnePro which will give you a huge folder of generic profiles for virtually every sensor on the planet that is used by photographers. You will always see a difference, sometimes for the better and sometimes for the worse. Have a play - you can't muck anything up.

    • @Mike-br4tw
      @Mike-br4tw 4 ปีที่แล้ว +1

      @@AndyAstbury Thanks, Andy! I would like to simplify the learning as much as possible. I might try the Capture one generic profiles at some point. For now, I just want to follow along with your insightful videos and learn the basics. Mike

    • @OlegKorsak
      @OlegKorsak 4 ปีที่แล้ว

      I created my own profile 👌

  • @ZafodB3
    @ZafodB3 3 ปีที่แล้ว

    ?… Somebody who years ago purchased the Adobe Creative Suite for $1200 then come upgrade time found that the upgrade was not supported for the original “Creative Suite”. The drive failed on the computer on which it was installed so when I tried to install it on a new drive and the activation server, at Adobe, no longer supported my version of the “Creative Suite”. I moved to Gimp! Now with Adobe’s subscription based method I find that, as an enthusiast, I can no longer financially justify the Use of Photoshop! Does this answer your question near the end of your video?

  • @HarensonHenao
    @HarensonHenao 3 ปีที่แล้ว

    HI Andy, thanks for this wonderful explanation about the L*a*b adjustments panel. I noticed when you switched from Snapshot2 (RGB) back to Snapshot3 (L*a*b) that the chromaticity is zero (0) I guess that's why we can see a saturation difference between both images, right? th-cam.com/video/3pxUd--zkeQ/w-d-xo.html
    Anyway, very good video, as usual, thanks again :)