output.png is an Empty Image

[noayed]

I've compiled the stereo model, and ran the following command:
./stereo_img --im0 ../data/im0.png --im1 ../data/im1.png
The output.png image I got is empty (zeros only), and the output.pfm contains non-zero values - possibly some version of the original image (screenshot below).
Do you have any idea what could be the problem?

Output of the make command:

COMPILER FLAGS:
-- CMAKE_BUILD_TYPE: Release
-- BUILD_SHARED_LIBS: ON
-- CMAKE_C_FLAGS= -fopenmp
-- CMAKE_CXX_FLAGS = -fopenmp -std=c++11 -fPIC -fmax-errors=3 -fpermissive -ggdb -Wunused-result -Wno-unused-variable -Wno-unused-value -Wno-unused-but-set-variable -Wdisabled-optimization -Wdiv-by-zero -Wc++11-compat -Wno-float-equal -O2 -DPARALLEL -ffast-math -DNDEBUG
-- CMAKE_CXX_FLAGS_RELEASE = -O3 -DNDEBUG
-- CUDA_NVCC_FLAGS= -arch=sm_30;-expt-extended-lambda;-ftemplate-backtrace-limit=2;-lineinfo;-std=c++11;-Xcompiler=-Wno-sign-compare;-O2;-keep;-src-in-ptx;-DNDEBUG;-Xptxas=-warn-lmem-usage;-Xptxas=-warn-spills
-- CUDA_PROPAGATE_HOST_FLAGS= OFF
-- COMPILE_DEFINITIONS =
-- Imageutilities requested components: iucore;iuio;iumath
-- ImageUtilities using iuio, adding OpenCV as dependency
-- Found OpenCV: /usr/local (found version "3.4.0") found components: opencv_core opencv_highgui
Enabling fixes for OpenCV >= 3
-- Found OpenCV: /usr/local (found version "3.4.0") found components: opencv_videoio opencv_core opencv_imgcodecs opencv_imgproc opencv_highgui
-- Found Imageutilities: /home/administrator/cnn-crf-stereo/dependencies/imageutilities/lib /home/administrator/cnn-crf-stereo/dependencies/imageutilities/include;/usr/local/cuda-9.0/samples/common/inc
-- dir1='/usr/include'
-- dir1='/usr/include/OpenEXR'
COMPILER FLAGS:
-- CMAKE_CXX_FLAGS= -fopenmp -std=c++11 -fPIC -fmax-errors=3 -fpermissive -ggdb -Wunused-result -Wno-unused-variable -Wno-unused-value -Wno-unused-but-set-variable -Wdisabled-optimization -Wdiv-by-zero -Wc++11-compat -Wno-float-equal -O2 -DPARALLEL -ffast-math -DNDEBUG --std=c++11
-- CUDA_NVCC_FLAGS= -arch=sm_30;-expt-extended-lambda;-ftemplate-backtrace-limit=2;-lineinfo;-std=c++11;-Xcompiler=-Wno-sign-compare;-O2;-keep;-src-in-ptx;-DNDEBUG;-Xptxas=-warn-lmem-usage;-Xptxas=-warn-spills
-- CUDA_PROPAGATE_HOST_FLAGS= OFF
-- Boost version: 1.59.0
-- Found the following Boost libraries:
-- program_options
-- filesystem
-- system
link dirs /home/administrator/cnn-crf-stereo/dependencies/imageutilities/lib/libiucore.so;/home/administrator/cnn-crf-stereo/dependencies/imageutilities/lib/libiuio.so;/home/administrator/cnn-crf-stereo/dependencies/imageutilities/lib/libiumath.so;/usr/local/cuda-9.0/lib64/libcufft.so;/usr/lib/x86_64-linux-gnu/libHalf.so;/usr/lib/x86_64-linux-gnu/libIex.so;/usr/lib/x86_64-linux-gnu/libIlmImf.so;/usr/lib/x86_64-linux-gnu/libIlmThread.so;/usr/lib/x86_64-linux-gnu/libImath.so;opencv_core;opencv_highgui;opencv_videoio;opencv_core;opencv_imgcodecs;opencv_imgproc;opencv_highgui;opencv_core;opencv_highgui;opencv_videoio;opencv_core;opencv_imgcodecs;opencv_imgproc;opencv_highgui;/home/administrator/cnn-crf-stereo/stereo/../dependencies/slackprop/lib/libslack_prop.so;cnpy
-- Configuring done
-- Generating done
-- Build files have been written to: /home/administrator/cnn-crf-stereo/build
[ 5%] Linking CXX shared library libcudnn_stereo.so
[ 68%] Built target cudnn_stereo
[ 73%] Linking CXX shared library libstereo.so
[ 89%] Built target stereo
[ 94%] Linking CXX executable stereo_img
[100%] Built target stereo_img

Thanks!

[noayed]

Also, when trying to evaluate results on middlebury images, I get the following results:

$ python compute_numbers_middlebury.py
Compute results for CNN3 ...
Q 4.0
Compute results for CNN3CRF ...
Q 4.0
Compute results for CNN3CRFJOINT ...
Q 4.0
Compute results for CNN3CRFFULL ...
Q 4.0
Compute results for CNN7 ...
Q 4.0
Compute results for CNN7CRF ...
Q 4.0
Compute results for CNN7CRFJOINT ...
Q 4.0
Compute results for CNN7CRFFULL ...
Q 4.0
CNN3 23.888
CNN3CRF 100.0
CNN3CRFJOINT 100.0
CNN3CRFFULL 100.0
CNN7 18.578
CNN7CRF 100.0
CNN7CRFJOINT 100.0
CNN7CRFFULL 100.0

So it looks like the problem might be in the CRF part..

[pknoebelreiter]

If the output is a zero-only image, then there is a CUDA problem. Since the CNN-only part seems to work in your case the problem is likely in the CRF as you said. The project is tested only with CUDA 8.0, hence I think your CUDA version 9.0 is the problem. I will investigate this problem in more detail.

[grandyang]

Got the same issue, empty output.png.

I am using Cuda 9.2.

[pknoebelreiter]

Only CUDA 8.0 works for the CRF part.