splitLab

splitLab ( integer Input, integer Light, integer A, integer B )

Use this function to split a color image into the Lightness, Red/Green and Yellow/Blue component images according to the Lab color model. A 48-bit RGB image will be split into 16-bit grayscale components; image of any other type will be split into 8-bit grayscale components.

Parameters

Input

An integer between 0 and 116 specifying the input image frame number. A value of 0 represents the DMA memory buffer of the video device. Values in the range of 100-116 correspond to hidden frames.

Light, A, B

Integer between 1 and 116 specifying the output frame numbers for the Lightness, Red-to-green and Yellow-to blue components respectively. Values in the range of 100-116 correspond to hidden frames.

Error flags

ERR_OK

The flag set if successful.

ERR_FAILED

The flag set if failed.

Example

This set of statements changes the color tone of an RGB image by splitting it into the LAB components, offsetting all the pixels in the A component by a value of +32 and then merging the components back into an RGB image.

L=101

a=102

b=103

Off=32

setCurDir("samples")

loadIm (1,"sample14.iwd")

splitLab (1, L, a, b)

offsetIm (a, a, Off, M_CLIP)

mergeLab (L, a, b, 2)

Remark

For more information on the Lab color space see setColorSpace.