Visionworks output error

Robotics & Edge Computing Jetson Systems Jetson Xavier NX
1

Running the candy operation on an image ,output is not expected.

include
include “NVX/nvx.h”
include “NVX/nvx_opencv_interop.hpp”
include “opencv2/opencv.hpp”
include <glog/logging.h>
include “NVX/Utility.hpp”
//include “NVX/FrameSource.hpp”
//include “NVX/nvxcu.h”

int main(int argc, char **argv) {
FLAGS_alsologtostderr = 1;
google::InitGoogleLogging(argv[0]);
vx_context context = vxCreateContext();
// 输入
std::string sourceUri = “./rocket.jpg”;
cv::Mat cv_src = cv::imread(sourceUri, cv::IMREAD_GRAYSCALE);
vx_image source = nvx_cv::createVXImageFromCVMat(context, cv_src);
LOG(INFO) << “cv load image”;
// vx_image source = nvxio::loadImageFromFile(context, sourceUri, VX_DF_IMAGE_U8);
vx_uint32 width, height;
vxQueryImage(source, VX_IMAGE_WIDTH, &width, sizeof(width));
vxQueryImage(source, VX_IMAGE_HEIGHT, &height, sizeof(height));
//输出
cv::Mat cv_dst(cv_src.size(), CV_8UC1);
// vx_image edges = vxCreateImage(context, width, height, VX_DF_IMAGE_U8);
vx_image edges = nvx_cv::createVXImageFromCVMat(context, cv_dst);
vx_threshold hyst = vxCreateThreshold(context, VX_THRESHOLD_TYPE_RANGE, VX_TYPE_INT16);
vx_int32 lowerThresh = 230, upperThresh = 250;
vxSetThresholdAttribute(hyst, VX_THRESHOLD_THRESHOLD_LOWER,
&lowerThresh, sizeof(lowerThresh));
vxSetThresholdAttribute(hyst, VX_THRESHOLD_THRESHOLD_UPPER,
&upperThresh, sizeof(upperThresh));
LOG(INFO) << “set up threshold”;
// Finally, the VisionWorks primitives are called in immediate mode.
// Note that intermediate data objects are created as normal images.
vx_image filtered = vxCreateImage(context, width, height, VX_DF_IMAGE_U8);

vx_image equalized = vxCreateImage(context, width, height, VX_DF_IMAGE_U8);
LOG(INFO) << "ready to go.";
vxuMedian3x3(context, source, filtered);
LOG(INFO) << "done filter 3x3";
vxuEqualizeHist(context, filtered, equalized);
LOG(INFO) << "done equalize hist";
vxuCannyEdgeDetector(context, equalized, hyst, 3, VX_NORM_L1, edges);
LOG(INFO) << "done canny edge";
{
    // save
    time_t now = time(0);
    char *dt = ctime(&now);
    cv::imwrite("edge_out" + std::string(dt) + ".jpg", cv_dst);
}
vxReleaseImage(&filtered);
vxReleaseImage(&equalized);
cv_src.release();
cv_dst.release();
LOG(INFO) << "done release";
return 0;

}
edge_outTue Dec 8 07:36:57 2020 rocket
Thanks.

3

Hi,

Thanks for your feedback.
Let us check your sample and share more information later.

Thanks.

4

Hi,

We try to reproduce this issue, but the original post’s source seems incomplete and has some problems.
Could you share a complete source as well as the reproduced steps with us?

Thanks.

5

CMakeLists.txt (938 Bytes) main.cpp (2.4 KB) rocket

No missing file in original post.

6

There is no update from you for a period, assuming this is not an issue any more.
Hence we are closing this topic. If need further support, please open a new one.
Thanks

Hi,

May I know your environment setting first? Ex. JetPack version, dependencies, …
We cannot compile the above source due to a link error from NVX/Utility.hpp.

Thanks.