float sranges[] = {0, 256};
const float* ranges[] = {hranges, sranges};
calcHist(&hsv, 1, channels, Mat(), hist, 2, histSize, ranges, true, false);
float sranges[] = {0, 256};
const float* ranges[] = {hranges, sranges};
calcHist(&hsv, 1, channels, Mat(), hist, 2, histSize, ranges, true, false);