Amazing as always, thanks for your video! People are often scared (me included) by the set-up in using C++, this is why we need videos such as this one: simple but clear to help entry level coders in C++. It would be very nice to level it up later and see the compilation from source with submodules (e.g. like ArUco which is not included in the "vanilla" installation of OpenCV). But again, thanks for sharing!
Amazing video! I've only a question. My version of opencv is 4.5.5, so 06:44 i wrote "opencv_world455d.lib", but it gives an error: "LNK1104 - unable to open file 'opencv_world455d.lib' ". Why? what should I do? Thank you very much!
Really useful for anyone starting with OpenCV. I struggled with different guides to make it right. I also had a problem when I hovered over a function and Visual Studio froze because of the large commentary of it. You had to delete the comments to Mat to make it work.
@@NicolaiAI the only thing that was weird was if i open the environment variables from the search on the start menu, it doesnt let me edit my system paths. but a quick google and found that if you open environment variables from the system settings in the control panel it lets me edit the system paths
This didn't work until I also added the file path "C:\opencv\build\include" to (Additional Include Directories) under the C/C++ options. Almost everything was loading in before that but the INTER_NEAREST callout. 6-2022
Thank you for the tutorial. It feels like this is way too complicated for what it should be, but at least you guided me succesfully through it! I have one question though, for now it is specified in debug mode, but could I just add the file without the d for the compiler (so have both files there) and have it work for release and debug? Sounds too easy to be true though
This is unfortunately the process for visual studio and linking different libraries. I have tutorials in vs code as well where I use cmake which is much easier
@@NicolaiAI thanks! It' s also possible configure vs to create a project with the opencv library automatically? I mean without set the VC++ Directories every time?
Please provide the appropriate link to the code sample. Your link just takes everyone to your GitHub with no direction as to what repo it is stashed into. Thanks for the video Nicolai I appreciate you. Feel free to remove this if you think it's needed. No hurt feelings. ; )
Hey there, just a quick note that got me stumbling for a moment... on my just installed VS2019, I had to change my configuration to x64 as somehow the default was win32. Once I got that changed, all was well.
@@johnnymurf didnt actually know that they upgraded it to x86 in the latest update, thank you! That should only good thing, but if u need x64 u can just download a earlier version
@@NicolaiAI OK thanks very much. I'll switch to 4.2.0 to avoid any difference headaches but out of curiosity why do newer one use x86 which is 32 bit instead x64 which is 64 bit? Or have I got them mixed up?
I am not using visual code but visual studio. In visual code u would need to use something like c make and compile it urself. I have linked a guide on the discord server
Someone mentioned that the newest versions works with x86 aswell but im not sure. Or else u will have to build the library from source. I'll add this guide for installation: docs.opencv.org/master/d3/d52/tutorial_windows_install.html
Nope In python u can just pip install opencv and then import it in code as a module. The setup in python is way easier and is also the same for all IDEs
WARNING! This is only for the DEBUG version which is much much SLOWER than the release version. This video shows how to set up the release version: th-cam.com/video/unSce_GPwto/w-d-xo.html
A. The version of the dll file (he talks about it around 7 minutes) may be different, in my case it was opencv_world460d.lib. Go to C:\opencv\build\x64\vc15\lib and check. B. This tutorial still did not work for me until I've added "C:\opencv\build\x64\vc15\lib" and "C:\opencv\build\x64\vc15\bin" to Properties=>Linker=>General=>Additional Library Directories C. Adding additional directories requires restart visual studio before it takes. Good luck.
Sorry, I have a guess to your setup process. Did you use the CMAKE to generate a whole vcxproj And Build the "ALL BUILD." Porject first? I can not build the "ALL BUILD" sucessfully.
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I tried many tutorials and yours is the best and most simple. Thank you so much Nicolai!
Thanks a lot man! Really appreciate it
Thanks .
This one is so much easier then the vs-code one.
Amazing as always, thanks for your video! People are often scared (me included) by the set-up in using C++, this is why we need videos such as this one: simple but clear to help entry level coders in C++. It would be very nice to level it up later and see the compilation from source with submodules (e.g. like ArUco which is not included in the "vanilla" installation of OpenCV). But again, thanks for sharing!
Thank you very much for the kind words! Really appreciate it :)
ty bro u have no idea how much this helped
Thanks for watching! Glad it helped
Amazing video!
I've only a question. My version of opencv is 4.5.5, so 06:44 i wrote "opencv_world455d.lib", but it gives an error:
"LNK1104 - unable to open file 'opencv_world455d.lib' ". Why? what should I do?
Thank you very much!
try 450
just try restart your computer, 455 should work
Thank you so much finally worked perfectly
Great to hear man! Thanks for watching
Really useful for anyone starting with OpenCV. I struggled with different guides to make it right. I also had a problem when I hovered over a function and Visual Studio froze because of the large commentary of it. You had to delete the comments to Mat to make it work.
Thank you! Glad that it helped u 🙂
awesome tutorial! thanks so much for the easy to follow instructions. worked first try
Thanks a lot man! Appreciate it and glad that it still worked. One of my older videos now
@@NicolaiAI the only thing that was weird was if i open the environment variables from the search on the start menu, it doesnt let me edit my system paths. but a quick google and found that if you open environment variables from the system settings in the control panel it lets me edit the system paths
thank you for amazing lecture! I really appreciate itXXD
Thanks a lot for watching! Glad that u liked it
this video helped me a lot! thank you!
Thanks for watching! Glad that it could help u
Make sure that in the Properties page you have set *Platform* to "All Platforms" or x64. I had it as WIn32 by default and it didn't work.
Thanks for this tutorial.
Can you make a tutorial about how to import an image to opencv from url using curl .
Thanks for watching! I’ll look into that
This didn't work until I also added the file path "C:\opencv\build\include" to (Additional Include Directories) under the C/C++ options. Almost everything was loading in before that but the INTER_NEAREST callout.
6-2022
i followed all the steps carefully and managed to run the test program without any errors, however the image window didnt show up
Make sure the path is correct
I had annoying issue to let it work, the problem was that I link both libraries in linker of vs, instead link just the one with the 'd' for debugging.
would it be the same for opencv contrib ?
Yeah I have a mother video aswell where we build opencv with everything purse
thank you very much :)
Awesome man! Thanks for watching
Thank you for the tutorial. It feels like this is way too complicated for what it should be, but at least you guided me succesfully through it!
I have one question though, for now it is specified in debug mode, but could I just add the file without the d for the compiler (so have both files there) and have it work for release and debug?
Sounds too easy to be true though
This is unfortunately the process for visual studio and linking different libraries. I have tutorials in vs code as well where I use cmake which is much easier
i change opencv_world420d.lib to opencv_world470d.lib(because i download 4.7 latest verison) but i got an error cant find file.
When I go to the opencv's github it has really different folders now, can someone send a link to get the version of openv what he is using please?
I think I'm on 4.5.2
Hi, how i can add the xfeatures2d library?
Its the contrib module. I have a video with gpu support with OpenCV and how u Can build from source with cmake and contrib module
@@NicolaiAI thanks! It' s also possible configure vs to create a project with the opencv library automatically? I mean without set the VC++ Directories every time?
it work thank you
thanks!
Welcome!
Is it possible to create a window constructor file, with OpenCV?
why these settings changing for every new project that I am creating? I would like to keep these settings for every project hpw I can do this?
The code is leading me to the... Unresolved external error near the the cv methods / functions calls
. Which is related to the. LNK 2019 ... errors..
Please provide the appropriate link to the code sample. Your link just takes everyone to your GitHub with no direction as to what repo it is stashed into. Thanks for the video Nicolai I appreciate you. Feel free to remove this if you think it's needed. No hurt feelings. ; )
Hey there, just a quick note that got me stumbling for a moment... on my just installed VS2019, I had to change my configuration to x64 as somehow the default was win32. Once I got that changed, all was well.
Yes opencv only works with x64, which is often the configuration that causes the errors. Glad that you figured it out!
@@NicolaiAI I'm using the latest release 4.5.1 and it will only work with x86. Do you know why? Also thanks for the great tutorials.
@@johnnymurf didnt actually know that they upgraded it to x86 in the latest update, thank you! That should only good thing, but if u need x64 u can just download a earlier version
@@NicolaiAI ah right I thought it would be an issue as x86 is older no?
@@NicolaiAI OK thanks very much. I'll switch to 4.2.0 to avoid any difference headaches but out of curiosity why do newer one use x86 which is 32 bit instead x64 which is 64 bit? Or have I got them mixed up?
Where is the example code? can't find it in your github link
my visual code has different interference i can't follow along. Can you tell me which version are you using??
I am not using visual code but visual studio. In visual code u would need to use something like c make and compile it urself. I have linked a guide on the discord server
I should definitely make a video in visual code aswell! I'm on that
@@NicolaiAI okay... I get it now 😅
@@NicolaiAI thanks a lot
If I would like to create new project then I need to repeat same step every time..? If No then how to make it global?
is this working on c#?
Anyone who still has trouble, don't forget to change x86 to x64 under the solutions configuration.
Awesome! Thanks for watching
is there anyway to get opencv working for x86?
Someone mentioned that the newest versions works with x86 aswell but im not sure. Or else u will have to build the library from source. I'll add this guide for installation: docs.opencv.org/master/d3/d52/tutorial_windows_install.html
What is the most efficient way to use openCV via C# in VS 2019?
please let me know if you've found out, I'm searching for the same (for VS22).
Thank you!
You are welcome!🙂
works the same way for python?
Nope In python u can just pip install opencv and then import it in code as a module. The setup in python is way easier and is also the same for all IDEs
Why Visual studio? Has same benefits?
im sooo Cooked, i follow more than 5 tutorials and still got eror "cant open source file opencv"
god help me T_T
im soo stupid
im on release mode, but I set for only debug. dumbasshell T_T
unable to open the file onecore.lib
where is the code you said writtwn in desc?
here is the include code:
#include
#include
#include
#include
thank u so much
Thanks for watching! Glad that i could help
@@NicolaiAI
That was absolutely useful, my program doesn't work until I saw your video 🌹👌
So nice! Happy coding 💪
WARNING! This is only for the DEBUG version which is much much SLOWER than the release version.
This video shows how to set up the release version: th-cam.com/video/unSce_GPwto/w-d-xo.html
bro u didnt link anything
A. The version of the dll file (he talks about it around 7 minutes) may be different, in my case it was opencv_world460d.lib. Go to C:\opencv\build\x64\vc15\lib and check.
B. This tutorial still did not work for me until I've added "C:\opencv\build\x64\vc15\lib" and "C:\opencv\build\x64\vc15\bin" to Properties=>Linker=>General=>Additional Library Directories
C. Adding additional directories requires restart visual studio before it takes.
Good luck.
Sorry, I have a guess to your setup process.
Did you use the CMAKE to generate a whole vcxproj
And Build the "ALL BUILD." Porject first?
I can not build the "ALL BUILD" sucessfully.
you are my man, thank you
Thanks
Thank you so much.
Thanks for watching! Glad that i could help
Thanks a lot!!!
Thanks for watching! Great that it could help u
Thanks a lot!