Exception raised on undecimated decomposition for large image

[wickeat]

I've encountered an exception when trying to perform swt2 or modwt2 on a large image (dimension is 23000 x 30000 pixels). Is there a limit to the allowable size of image for decomposition in the decomposition functions? Would there be a workaround to this issue?

[rafat]

Can you give more information ? Please attach a screenshot of the exception if possible.

On Mon, Jan 20, 2020, 15:25 wickeat [email protected] wrote:

I've encountered an exception when trying to perform swt2 or modwt2 on a large image (dimension is 23000 x 30000 pixels). Is there a limit to the allowable size of image for decomposition in the decomposition functions? Would there be a workaround to this issue?

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[wickeat]

The exception is Exception thrown at 0x00007FF69A74A25F in Test.exe: 0xC0000005: Access violation writing location 0x0000000000000000. occurred.

Below is a snippet of the code written.

    auto obj = wave_init("sym2"); // Initialize the wavelet

    cv::Mat doubleIn;
    cv::Mat doubleOut = cv::Mat::zeros(input.size(), CV_64F);
    input.convertTo(doubleIn, CV_64F);
    auto inp = reinterpret_cast<double*>(doubleIn.data);
    auto oup = reinterpret_cast<double*>(doubleOut.data);

    int J = 1;

    auto wt = wt2_init(obj, "modwt", doubleIn.rows, doubleIn.cols, J);

    // Perform decomposition
    auto wavecoeffs = modwt2(wt, inp);

The exception is raised at the modwt2 function.

This piece of code worked for other smaller images, but not on the big one I have tried.