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What is noise in photography?
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- เผยแพร่เมื่อ 24 พ.ย. 2019
- What is noise in photography? Today I give a brief explanation about noise and when you might get it in your photographs.
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Great explanation! I’m new to the photography world and looking to learn something new everyday, you delivered that for me today!
Welcome to the club Miguel!
Photography can be frustrating at first but it is a lot of fun once you get the hang of it!!
I also have this playlist for all of my short tutorials and explanations that you might like to save: th-cam.com/video/ZLNrRS9LRd4/w-d-xo.html
Once you click on it, the list on the right hand side is in alphabetical order, to make it easier for you to find what you want to learn about ... and if you can't find it, let me know and I'll see if I can help!
Thanks for watching 😁👍
Wonderfully made video. Clearly illustrated with complete understanding. Thank you for the bonus video.
Thanks so much Lance, much appreciated...and glad you liked the bonus video!! 😁👍
This is something that took me some experimentation with a while back. For a while, I was underexposing everything and didn't understand why parts of my image had what appeared to be noise to me when recovering in Lightroom. Now I try to nail my exposure a little better, even if that means coming off of 100 ISO. I feel like I have cleaner images. Just because you can underexpose and recover, doesn't mean you always should. That was my takeaway. Thanks for the reminder, Mike.
Awesome! And that's a great takeaway!! Nowadays it is not so important to keep it on iso 100. It will give you the cleanest image when the exposure is good, but I'll bump mine up to iso 2000 before worrying too much with my own photos. On a photoshoot, I've pushed it to 2000 for online work but for printing work, I'll always keep it as low as possible and break out the tripod whenever possible. 😁👍
Explained clearly about noise. Great video.
Thanks so much Ravi!! 😁👍
Great video. I'll be showing this to my daughter!
Awesome! That's great, and that's the idea of these videos, little quick bits of information for people to learn who might be ok photographers but need to fill in the gaps ... and also for complete beginners to learn in manageable chunks!
Thanks Michael! 😁👍
So informative. Absolutely love it. Thank you.
Great to hear it has helped!
Thanks for watching 😁👍
Thank you so much for your video! 😊💐
No worries, Thanks for watching 😁👍
As always, clear and concise explanation. I really enjoy the weekly (or in this case twice a week) tips so please keep them coming! Do you think you could do a tutorial on the different options within a picture profile on the Sony a7iii. I know you have covered which settings you choose, but I would love to understand what the reasoning is behind selecting the different options (e.g. knee, gamma, colour mode).
Thanks so much Daniel!!
I actually use the sony pro colour eosHD.com pack as its really easy instead of worrying too much about knee, elbow, gamma, etc. So my knowledge isn't that good on all that stuff...If you go over to Andrew's website at eosHD, he's got a lot more knowledge about this than me.
I hope that helps dude. 👍
@@mikesphotography cheers Mike! I'll check it out!
Nice and clear explanation, Mike ( no pun intended!) Ha, ha - thanks for justifying my recent purchase of the Sony 24 f1.4 GM lens. Yes, I have been trying it out on night shots in the city! I am experimenting with manually dialling in ISO instead of having it on Auto for cleaner images.
Haha! Awesome!! It is a fantastic lens isn't it, I used one last month and I am so tempted to sell my batis 25mm and get the 24mm GM.
That's great to hear you're experimenting with manually dealing in the ISO...its a great step to make and will really help your photography in the long run...and if it all starts getting a bit hectic, you know you can always switch back to Auto ISO.
How are you getting on with night city photography?
Thank you so much...
And thank you for watching 😁👍
Cheers Mike! You mentioned it, but I'm going to pile in on top and repeat it. In the fight against noise you should really consider doing an entire video on the importance of getting the exposure right in the first place. I do primarily wildlife photography and live in the Pacific Northwet (Seattle, US) where it's overcast ~8+ months of the year. Low light and high shutter speeds do not play well. When I started I made the boneheaded, dumb mistake of " *I'll keep my ISO low to avoid noise!* " -- which predictably lead to thousands of completely unusable, underexposed shots with *terrible* noise despite having low-ish ISO. I used to believe anything above ISO 1000 would just be waste of time because of the noise - which is totally untrue. It took the longest time for me to make the connection between proper exposure and noise levels (I can be pretty dumb when I set my mind to it) Once I did make the connection though I stopped living in fear of high ISO and instead became terrified of underexposing my shots. Learn to love the histogram, push your exposures to the right, and high ISO noise becomes almost trivial to handle in post. I've got shots now with ISO levels above 10k that are entirely usable. There's noise in them of course, but so long as the exposure is correct that noise is entirely manageable in post... something I thought was damn near *impossible*
Most definitely, it's got a lot to do with the signal to noise ratio...you get a good signal and like you said, you can get some great images with much higher ISOs.
I definitely have a video planned on this subject coming soon. It's really interesting and good to know about to gain a much better understanding of the camera in your hands!
Happy New Year 👍
I wonder when AI will get amazing at predicting and eliminating/ minimizing noise. I think if we can take 720p signals and bump them to 4K pretty reliably, i bet similar scenarios could drastically reduce noise. I'm so excited for the future!
To be honest when an image gets pixely up close I like the noise
THANK you so much for this video and please make a video on smartphone photo . all things covered like, what is the underexposed photo and everything in the smartphone camera and photos. please. BY THE WAY. YOU GOT A SUBSCRIBER HERE :)
Thanks so much for liking, commenting and subscribing Paavan!
And thanks for the request, I'll see what I can do. 😁👍
THANK YOU VERY MUCH
No worries, Thanks for watching 😁👍
Thanks mate :)
No worries, thanks for watching! 😁👍
👍Super high “signal to noise” ratio in vid content, Mike!😁 Great image “so what factor” examples, and TV static meme (nice effect). Wonder how many viewers recall those sets. (AM radio “static” is another analogy I hear sometimes, where cam electronics and natural background RF signals are picked up by sensor.) Would noise reduction techniques apply equally to “color noise” in a photo, or is that something different?
Haha! Thanks dude!! That's a good point...I don't think many would recall those old TV sets...
The colour noise slider in Lightroom is actually quite effective and is in the same Detail panel as the luminance slider. From my slapdash knowledge on the subject of noise, I think it is pretty much the same, just a variation in the RGB levels for each block causing the colour noise to show up.
👍
Nice video, Mike. One question: in situations with a high dynamic range, like a landscape with a white sky or a room with a white window, what do you do? Do you spot-expose for the highlights, accepting the trade- off of some noise when you recover the shadows, or do you matrix-expose, accepting patches of blown-out highlights? Or do you always bracket the exposure in these situations and combine them in post-production? From my experience if you don't want to take multiple exposures it's probably better to expose for the highlights, and then maybe use exposure compensation for just underexposing them of 1/3 of a stop, what do you think?
Good question Paolo!
I’d normally exposure bracket when the dynamic range is larger than the camera can handle. But if you don’t want to do this, the best way is to expose your shots so your highlights are safe. I’d expose to the right and make sure the highlights are not clipping. It’s easier to pull detail out of the shadows than to recover blown out highlights. 👍
thanks Mike! it is as I thought .... by the way, in my previous message I meant "overexposing them by 1/3 of a shot".....
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Nice informative video.
Do you know how ISO noise is measured by camera manufacturers? Is the ISO objectively measured?
Thank you.
Thanks Paul, I think it used to be more standardised with film but apparently cameras are all over the place these days. Tony Northrup did a video on it a while back and it's quite interesting: th-cam.com/video/QVuI89YWAsw/w-d-xo.html
I hope that helps. 👍
So if my image looks normal when not zoom in, but after i really zoom in there is lot grain is that still count noise?
Yep, that is noise. 👍
Nice 👍
Thanks Muni!! 😁👍
My images are full of noise even with Sony a7iii
That sucks...what mode do you normally shoot in and are you normally in bright conditions or dark and dingy conditions? ... and are you a pixel peeper!? 😁
Mike Smith I have no clue what u just said 😬
Mike Smith I do it in manual mode for astro photo at iso 3000 , 6000 1500 still loads of noise
Mike Smith where I stay there is loads of light pollution
Haha!! No worries...pixel peepers are generally people who zoom in and analyze their images at 100% magnification looking at all of the little pixels noticing all of the imperfections...most viewers wouldn't look at the image like this and would just look at it as a whole. 😃
In astrophotography, you will get noise as there isn't much light about to start with and the signal to noise ratio would be low (the more light there is for your camera to soak up, the better the image will be as the exposure will drown out the background noise). There are two ways around this. You can either buy a tracker to get longer exposures, or you can stack your shots to reduce noise with programs like starry landscape stacker.
I did a video on stacking not so long ago: th-cam.com/video/rEU9kPCwotM/w-d-xo.html&t
I hope that helps. 👍