[Question] Will the `Mat` implicit convert to `InputArray` cause memory leak?

[GF-Huang]

Summary of your issue

Such like this, the mat2 implicit convert to MatchTemplate first parameter InputArray:

mat1.MatchTemplate(mat2, xxx);

Environment

Win11 22H2 .NET 7.

[shimat]

The implicit conversion from Mat to InputArray allocates a small amount of memory space that is difficult to free by GC. (I believe this is a design error in the current OpenCvSharp.)

A good way to deal with this problem is to frequently call GC.Collect();. Alternatively, I recommend the following:

using var src = InputArray.Create(mat1);
using var dst = OutputArray.Create(mat2);
using var xxx_ = InputArray.Create(xxx);
Cv2.MatchTemplate(src, dst, xxx_);

[stale[bot]]

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