installation error: ‘CV_LOAD_IMAGE_COLOR’ was not declared

[bbkslh]

Hi , I tried to install Caffe on Ubuntu 12.04. However I am getting the following error: 

src/caffe/layers/window_data_layer.cpp: In member function ‘virtual void caffe::WindowDataLayer<Dtype>::InternalThreadEntry()’:

src/caffe/layers/window_data_layer.cpp:230:48: error: ‘CV_LOAD_IMAGE_COLOR’ was not declared in this scope

Have you ever experienced this problem?

[Mohamed Zahoor]

Your Opencv installation has some problems...

Which version did you install?

./zahoor

[bbkslh]

I have two versions of opencv installed:  2.3 and 3 

[Friendly User]

opencv 3 is still beta and opencv 2.3 is a bit too old, use 2.4.9 ;)

[Greg Hines]

I manually changed the one line to cv::IMREAD_COLOR and am now getting the errors:
g++ .build_release/tools/extract_features.o .build_release/lib/libcaffe.a -o .build_release/tools/extract_features.bin -fPIC -DNDEBUG -O2 -DCPU_ONLY -I/usr/include/python2.7 -I/usr/lib/python2.7/dist-packages/numpy/core/include -I/usr/local/include -I.build_release/src -I./src -I./include -Wall -Wno-sign-compare -L/usr/lib -L/usr/local/lib -L/usr/lib -lglog -lgflags -lprotobuf -lleveldb -lsnappy -llmdb -lboost_system -lhdf5_hl -lhdf5 -lopencv_core -lopencv_highgui -lopencv_imgproc -lpthread -lboost_thread -lcblas -latlas
.build_release/lib/libcaffe.a(window_data_layer.o): In function `caffe::WindowDataLayer<float>::InternalThreadEntry()':
window_data_layer.cpp:(.text._ZN5caffe15WindowDataLayerIfE19InternalThreadEntryEv[_ZN5caffe15WindowDataLayerIfE19InternalThreadEntryEv]+0x35f): undefined reference to `cv::imread(cv::String const&, int)'
.build_release/lib/libcaffe.a(window_data_layer.o): In function `caffe::WindowDataLayer<double>::InternalThreadEntry()':
window_data_layer.cpp:(.text._ZN5caffe15WindowDataLayerIdE19InternalThreadEntryEv[_ZN5caffe15WindowDataLayerIdE19InternalThreadEntryEv]+0x36b): undefined reference to `cv::imread(cv::String const&, int)'
.build_release/lib/libcaffe.a(io.o): In function `caffe::ReadImageToDatum(std::string const&, int, int, int, bool, caffe::Datum*)':

Any suggestions? Having trouble building opencv 2.4.10 or I would just use that.

[Sancho McCann]

The cv::imread function was moved to the libopencv_imgcodecs library. You have to also add opencv_imgcodecs to the list of libraries in the Makefile.

See: https://github.com/BVLC/caffe/pull/1714 and https://github.com/BVLC/caffe/pull/1667 ... looks like they're working to make this all easier for us OpenCV 3 users.

[Greg Hines]

Thanks, that worked. FYI for anyone else. On line 172 of the Makefile, I added opencv_imgcodecs to the list (that line starts opencv_core).

[Anatoly Baksheev]

Right, `opencv_imgcodecs` should be added to Makefile for 3.x!  Both #1714 and #1667 fix this by adding proper includes in sources and libraries to link in CMake only.

-- Anatoly

On Wed, Feb 18, 2015 at 8:20 PM, Greg Hines <gr...@zooniverse.org> wrote:

Thanks, that worked. FYI for anyone else. On line 172 of the Makefile, I added opencv_imgcodecs to the list (that line starts opencv_core).

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[Sancho McCann]

That means you're likely compiling against opencv 3.0. The symbol "CV_LOAD_IMAGE_COLOR" has been replaced with "cv::IMREAD_COLOR". Just edit the window_data_layer.cpp file and you should be good. It's the only deprecated symbol used in Caffe.

[karina.c...@gmail.com]

"CV_LOAD_IMAGE_COLOR"  change it to "cv::IMREAD_COLOR"

[Basheer Alwaely]

I got the same issue

[Tamas Nemes]

It should be helpful if you write which OpenCV version you are using. As mentioned in the posts before, with OpenCV 3 and above the macros CV_LOAD_IMAGE_COLOR and CV_LOAD_IMAGE_GRAYSCALE were changed to "cv::IMREAD_COLOR" and "cv::IMREAD_GRAYSCALE" along with many others. I got the same issue when compiling, just go to the source files that give the error message (found in [CAFFE_ROOT]/src/caffe) and change them manually. You can search the internet for the equivalent definitions in the 3 and 4 version.

Or you could go easier and use this guide: https://qengineering.eu/install-caffe-on-ubuntu-20.04-with-opencv-4.4.html Here, it is explained step-by-step what you have to do and even provide a modified Caffe repo which was adapted to OpenCV 4, so you just have to follow the instructions. Works also with version 3.

Good luck to everyone!