suggest add a type to imcodecs.go

[cnjack]

type FileExt string
const(
    PngFileExt FileExt = ".png"
   JPEGFileExt FileExt = ".jpg"
 ...
)
func IMEncode(fileExt string, img Mat) (buf []byte, err error) {
	cfileExt := C.CString(fileExt)
	defer C.free(unsafe.Pointer(cfileExt))

	b := C.Image_IMEncode(cfileExt, img.Ptr())
	defer C.ByteArray_Release(b)
	return toGoBytes(b), nil
}

I use IMEncode("png", img) evoke a panic

[deadprogram]

Thanks for the PR to address this, it is now in the dev branch. I will close this issue once the next release goes out.

[cnjack]

get