Exception thrown when using DNN at Ubuntu OS

[vsolominov]

Summary of your issue

When using super resolution I get the error _FX_WINO_IBLOCK == 3 && _FX_WINO_KBLOCK == 4. The LapSRN_x2 model is used for super resolution.

There is no error on HOST = Windows 10.

Environment

What did you do when you faced the problem?

I tried using other versions of OpenCvSharp (4.9, 4.8, 4.7) and corresponding contrib versions.

Tried to find a solution to the problem on the web. One of the possible solutions was found at https://forum.opencv.org/t/exception-thrown-when-running-a-sample-using-dnn/12818. One of the answers recommends disabling winograd optimization with dnn.enableWinograd(false). However, I did not find such a method in OpenCvSharp.

Example code:

using var superResolution = new DnnSuperResImpl();
superResolution.ReadModel("LapSRN-x2.pb");
superResolution.SetModel("lapsrn", scale = 2);

var output = new Mat();
try
{
    superResolution.Upsample(input, output);
    return output;
}
catch
{
    output.Dispose();
    throw;
}

Output:

OpeCvSharp.OpenCVException: _FX_WINO_IBLOCK == 3 && _FX_WINO_KBLOCK == 4

What did you intend to be?

1. The super-resolution operation is performed without error.
2. The OpenCvSharp library provides the dnn.enableWinograd(false) method.