c# 4.0 - cveCvtColor causing error OpenCV: u->origdata == data -


i doing face detection using emgu cv in c#.net v4.0, below code code detection.

image<bgr, byte> imageframe = new image<bgr, byte>(currentimg); rectangle[] facesdetected; using (umat ugray = new umat()) {     cvinvoke.cvtcolor(imageframe, ugray, emgu.cv.cvenum.colorconversion.bgr2gray);     cvinvoke.equalizehist(ugray, ugray);     facesdetected = evidencelibrary.face.detectmultiscale(ugray, 1.2, 4, new size(20, 20)); } ...

full stack trace is:

29/3/2017 12:04:46.132 pm: opencv: u->origdata == data :cvecvtcolor(0,0) stacktrace::    @ emgu.cv.cvinvoke.cverrorhandler(int32 status, intptr funcname, intptr errmsg, intptr filename, int32 line, intptr userdata)    @ emgu.cv.cvinvoke.cvecvtcolor(intptr src, intptr dst, colorconversion code, int32 dstcn)    @ emgu.cv.cvinvoke.cvtcolor(iinputarray src, ioutputarray dst, colorconversion code, int32 dstcn)    @ evidencerepository.camerapreview.currentimage() inner exception as:

according stacktrace causing issue @ line cvinvoke.cvtcolor(imageframe, ugray, emgu.cv.cvenum.colorconversion.bgr2gray);. searching cause of long time without success.

interesting exception occurring on 1 machine having windows 10 64 bit os. on other testing machine (same os) working well.

i have checked display drivers , latest version of it.


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