Specifications

Intel
®
Image Processing Library Reference Manual
9-16
9
RGB2YCrCb
Converts RGB images to
the YCrCb color model.
void iplRGB2YCrCb(IplImage* rgbImage , IplImage*
YCrCbImage );
rgbImage ThesourceRGBimage.
YCrCbImage The resultant YCrCb image.
Discussion
The function converts the RGB image rgbImage to the YCrCb image
YCrCbImage (via the YUV model) according to the following formulas:
Y =0.3
·R + 0.6·G + 0.1·B
U = B
- YCb=0.5·(U+1)
V = R
- YCr= V/1.6 + 0.5.
The function checks that the input image is an RGB image; it sets the
channel sequence and color model of the output image to “YCr”.
YCrCb2RGB
Converts YCrCb images
to the RGB color model.
void iplYCrCb2RGB(IplImage* YCrCbImage , IplImage*
rgbImage );
YCrCbImage The source YCrCb image.
rgbImage The resultant RGB image.
Discussion
The function converts the YCrCb image YCrCbImage to the RGB image
rgbImage . The function checks that the input image is a YCrCb image and
that the output image is RGB.