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"Why do I get 38 ?" because CV_BGR2GRAY formula conversion is here

"please suggest me compilation options" I use cmake on all platform : windows (VS2013-2015, Mingw 64), raspberry and ubuntu...

"Why do I get 38 ?" because CV_BGR2GRAY formula conversion is here

"please suggest me compilation options" I use cmake on all platform : windows (VS2013-2015, Mingw 64), raspberry and ubuntu...

and opencv version is necessary to help you more...

"Why do I get 38 ?" because CV_BGR2GRAY formula conversion is here

opencv use Blue Green Red format

310.299+0.58741 + 0.114*45 = 38.466

"please suggest me compilation options" I use cmake on all platform : windows (VS2013-2015, Mingw 64), raspberry and ubuntu...

and opencv version is necessary to help you more...

"Why do I get 38 ?" because CV_BGR2GRAY formula conversion is here

opencv use Blue Green Red format

310.299+0.58731 * 0.299+0.587 * 41 + 0.114*45 0.114 * 45 = 38.466

"please suggest me compilation options" I use cmake on all platform : windows (VS2013-2015, Mingw 64), raspberry and ubuntu...

and opencv version is necessary to help you more...