Aly Osama's profile - activity

i know the problem i have ATI graphics card and i installed ‘libopencv-dev‘ so i need to replace it with ‘ocl-icd-libopencl1‘ , you can check this link

installing ‘libopencv-dev‘ on non nvidia graphics card messes up the drivers. As a workaround for non nvidia cards like AMD/ATI, Radeon, replace libopencv-dev below with ‘ocl-icd-libopencl1‘ which is a generic driver. Please note that I have not tried this out yet as I have no ATI/Radeon cards to test with .

i want to know what is the importance of installing libopencv-dev package on ubuntu ? if i want to build opencv from the source code ?

i try to build the master branch and i found this error what shall i do ?

Linking CXX shared library ../../lib/libopencv_imgproc.so
/usr/bin/ld: ../../../3rdparty/ippicv/unpack/ippicv_lnx/lib/ia32/libippicv.a(jmp_ippiResizeGetBufferSize_16s_as.s.o): relocation R_386_GOTOFF against undefined symbol `ippicvJumpIndexForMergedLibs' can not be used when making a shared object
/usr/bin/ld: final link failed: Bad value
collect2: error: ld returned 1 exit status
make[2]: *** [lib/libopencv_imgproc.so.3.0.0] Error 1
make[1]: *** [modules/imgproc/CMakeFiles/opencv_imgproc.dir/all] Error 2
make: *** [all] Error 2

also it didn't recognize #include "opencl_kernels_imgproc.hpp" in imgwrap.cpp

i checked it , it was CMAKE_INSTALL_PREFIX:PATH=/usr/local so it think it hit my updated libs

i try fflush(stdout) and endl but it didn't work

i want to fix a bug in function in imgproc so i try to edit source code in ( opencv/modules/imgproc/src/.. ) i write an output stream at the beginning of this function to check when i run the code if its my modified code or not

std::cout<<"My New Code"<<std::endl;

then i rebuild opencv and install it again

make 
sudo make install

when i try to use the function again , nothing appear on my screen . so how can i do this ? also if there is a good method that help me to fix any bug and see what have i changed ?

you can check the list of opencv books
if you want to learn how to deal with Java opencv you have to read this

Do you know the reason , why they didn't implement its reader , its an essential format for medical images .

could you tell us what is your problem you need to detect so we can recommend you a suitable classifier ?

the binary images is made up of uchars , so you can access any pixel in the image using this

binImage.at<uchar>(i,j)

yes , you can write flv format video using CV_FOURCC('F','L','V','1')

cvCreateVideoWriter("disparity_output.flv",CV_FOURCC('F','L','V','1') , 32, size, 0);

if it does't work you can try recompiling opencv with ffmpeg, you can check this link for more details

i want to read and view dicom images in opencv to perform medical imaging operations , how can i do that ? Thanks