cc [ flag... ] file... –lmlib [ library... ] #include <mlib.h> mlib_status mlib_ImageColorTrue2Index(mlib_image *dst, const mlib_image *src, const void *colormap);
The mlib_ImageColorTrue2Index() function converts a true color image to a pseudo color image with the method of finding the nearest matched lookup table entry for each pixel. The source image can be an MLIB_BYTE or MLIB_SHORT image with three or four channels. The destination must be a single-channel MLIB_BYTE or MLIB_SHORT image.
The last parameter, colormap, is an internal data structure (which includes the lookup table) for inverse color mapping. Create it by calling the mlib_ImageColorTrue2IndexInit() function.
The function takes the following arguments:
Pointer to destination or destination image.
Pointer to source or source image.
Internal data structure for inverse color mapping.
The function returns MLIB_SUCCESS if successful. Otherwise it returns MLIB_FAILURE.
See attributes(5) for descriptions of the following attributes:
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mlib_ImageColorErrorDiffusion3x3(3MLIB), mlib_ImageColorOrderedDither8x8(3MLIB), mlib_ImageColorTrue2IndexFree(3MLIB), mlib_ImageColorTrue2IndexInit(3MLIB), attributes(5)