CODEWITHSUNDEEP
androidopencv
BlueSword
BlueSword

Reputation: 1346

Assertion error in Grabcut

I am trying to implement Grabcut in Android from reference code. But when I run the code the following error is generated.

Error:

OpenCV Error: Assertion failed (0 <= roi.x && 0 <= roi.width && roi.x + roi.width <= m.cols && 0 <= roi.y && 0 <= roi.height && roi.y + roi.height <= m.rows) in cv::Mat::Mat(const cv::Mat&, const Rect&), file /home/reports/ci/slave_desktop/50-SDK/opencv/modules/core/src/matrix.cpp, line 323

I have also read Similar article on Stackoverflow and made following changes in the code but still got the same error.

Changed Part of reference code:

private void backgroundSubtracting(Mat img, Mat background) {
    Mat firstMask = new Mat();
    Mat bgModel = new Mat();
    Mat fgModel = new Mat();
    Mat mask;
    Mat source = new Mat(1, 1, CvType.CV_8U, new Scalar(3.0));
    dst = new Mat();
    Rect rect = new Rect(318,100,513,349);  // <= Static value for checking

    Imgproc.grabCut(img, firstMask, rect, bgModel, fgModel, 1, 0 /* GC_INIT_WITH_RECT */);

PS: This is my first question so sorry if there are any mistakes in formatting.

Upvotes: 0

Views: 887

Answers (1)

double_g
double_g

Reputation: 836

In my point of view, assertion happens when grabcut rect isn't inside mat.
What is the image dimensions ?

Upvotes: 1

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