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i convert image to HSV after it i make the threshold the yellow color so the code is
cvInRangeS(imgHSV, cvScalar(112, 100, 100), cvScalar(124, 255, 255), imgThreshed);
but it doesn’t work always give me black image .
You should try this tutorial for “tracking yellow objects”.
It gives a HSV range of
cvInRangeS(imgHSV, cvScalar(20, 100, 100), cvScalar(30, 255, 255), imgThreshed)for yellow object.If you have any doubt on selecting color, try this : http://www.yafla.com/yaflaColor/ColorRGBHSL.aspx