Sample 13 AccessViolationException

[obie73]

When run line 31

extractor.Compute(img1, ref keypoints1, descriptors1);

Throw an AccessViolationException

I updated packages via nuget. Does not fix problem.

Thanks for your work!

[VahidN]

I think you should follow this issue here

[obie73]

The solution of this link does not fix the issue :(

[nccwarp9]

same here, I get System.AccessViolationException: 'Attempted to read or write protected memory. This is often an indication that other memory is corrupt.' at
extractor.Compute(img1, ref keypoints1, descriptors1);

[gerwalk]

+1

[ INFO:0] Initialize OpenCL runtime...

Unhandled Exception: System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
   at OpenCvSharp.NativeMethods.features2d_Feature2D_compute1(IntPtr obj, IntPtr image, IntPtr keypoints, IntPtr descriptors)

[gerwalk]

Fixed:
Change the extractor from type BRIEF to FREAK on line 28:

var extractor = FREAK.Create();