Opencv: Converting hue image to RGB image

Question

I am trying to show the hue component of the image from my webcam. I have split apart the image into the hue component but I can't figure out how to show the hue component as the pure colors. For example if one pixel of the image was B=189 G=60 R=60 then in HSV, H=0. I don't want the draw image to be the the gray values of hue but the RGB equivalent of the hue or H=0 -> B=0 G=0 R=255

IplImage *image, *imageHSV, *imageHue;
image = cvQueryFrame(capture); //image from webcam
imageHSV = cvCreateImage( cvGetSize(image), IPL_DEPTH_8U, 3 );
imageHue = cvCreateImage( cvGetSize(image), IPL_DEPTH_8U, 1 );
cvCvtColor( image, imageHSV, CV_BGR2HSV );
cvSplit( imageHSV, imageHue, 0, 0, 0 );

I have a feeling there is a simple solution so any help is appreciated.

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zerm zerm · Accepted Answer · 2010-06-11T06:44:54

If I understand you correctly, you want to "correctly" visualize just the Hue component. You can create another imageSat and imageVal, one-channel each and filled with 255 (maximum). Then cvMerge your imageHue with the other two, to create a new HSV image, and convert that back to RGB/BGR for final display.

Opencv: Converting hue image to RGB image

1 Answers