Subhasis's profile - activity

IplImage *kinectDepthImage; kinectDepthImage = cvCreateImage( cvSize(640,480),IPL_DEPTH_16U,1);

/* Here I put the data into the Image */ //Now I want to put it into a buffer ..any of the below 2 lines gives me error cv::WImageBuffer_16u depthBufer(kinectDepthImage); or cv::WImageBuffer1_16u depthBufer(kinectDepthImage);

My error is " /opt/ros/fuerte/include/opencv2/core/wimage.hpp:243: cv::WImage<t>::WImage(IplImage*) [with T = short unsigned int, IplImage = _IplImage]: Assertion `!img || img->depth == Depth()' failed. pass1Aborted (core dumped) "

Hi All, I have an issue with running CUDA gpu on OpenCV 2.4.2. I have a 8600 GTS graphics card with CUDA enabled (v1.1). I compiled OpenCV with CUDA on. And it built binaries successfully.

I tried to run a simple code from opencv_gpu tutorial. It gives me an error as mentioned in the subject.

  try
   {
       cv::Mat src_host = cv::imread("lena.jpg", CV_LOAD_IMAGE_GRAYSCALE);
       cv::gpu::GpuMat dst, src;
       src.upload(src_host);

       cv::gpu::threshold(src, dst, 128.0, 255.0, CV_THRESH_BINARY);

       cv::Mat result_host(dst);
       cv::imshow("Result", result_host);
       cv::waitKey();
   }
   catch(const cv::Exception& ex)
   {
       std::cout << "Error: " << ex.what() << std::endl;
   }

A similar issue is posted in another thread as given below. But there has been no solution. Can anybody give am idea of what could be the problem

http://answers.opencv.org/question/2542/gpu-api-call-error-out-of-memory-in-mallocpitch/

Hi All,

OpenCV Error: No GPU support (The library is compiled without GPU support) in throw_nogpu, file /tmp/buildd/ros-fuerte-opencv2-2.4.2-0precise-20120908-1632/modules/gpu/src/precomp.hpp, line 113 terminate called after throwing an instance of 'cv::Exception' what(): /tmp/buildd/ros-fuerte-opencv2-2.4.2-0precise-20120908-1632/modules/gpu/src/precomp.hpp:113: error: (-216) The library is compiled without GPU support in function throw_nogpu

I built OpenCV WITH_CUDA on. It was built succesfully.I suppose there is some conflict between openCV from ROS and my installed ROS. I also tried to run the example after it built the binaries called ./opencv_test_gpu. It said me Ok for most of the test untill it stopped with an error as below

./opencv_test_gpu

OS: Linux 32 CUDA Driver version: 5000 CUDA Runtime version: 4020 CUDA device count: 1

Device 0: Name: GeForce 8600 GTS Compute capability version: 1.1 terminate called after throwing an instance of 'cv::Exception' what(): /home/subhasis/OpenCV-2.4.2/modules/core/src/gpumat.cpp:312: error: (-217) out of memory in function queryMemory

Segmentation fault (core dumped)

I would be greatful if someone suggests me a solution for the problem.

Thanks a lot...Your solution was helpful. Now I dont have the bad pointer issue.

Hi, I completely agree with your point about the pointer getting overwritten.As you see there are only 3 lines of code in the program and no other variable. The only thing I am unable figure out in these 3 lines of code, where exactly it occurs. If I remove the first line of the cv::mat object i dont get the bad pointer problem in release mode as well. I would really appreciate if you can give me a hint of where can this behaviour occur regarding the illegal memory overwritting

I tried to rebuild the solution with no success. If i try to put the string variable global it doesnt have any problem. But inside the same function they create problem (only in the release mode). I really am unable to figure out the reason.

I tried to rebuild the solution with no success. If i try to put the string variable global it doesnt have any problem. But inside the same function they create problem (only in the release mode). I really am unable to figure out the reason.

Hi All,

I had a problem. Basically, was little strange. I have a feeling it might be a bug in OpenCV. But not sure. The below code works only in debug mode but not in release mode (VS 2010 express edition). The problem is string variable path shows bad pointer and doesn’t assign the value as given below to it. I am using OpenCv 2.4.0.

cv::Mat testMatrix(3,3,CV_64F);
std::string path = ".\\input";
std::cout<<path ;

If I remove the first line it works fine. And this problem occurs only in release mode not in debug mode. Do you have any suggestions ?