mlib_ImageColorErrorDiffusion3x3(3MLIB)

Name

mlib_ImageColorErrorDiffusion3x3 - true color to indexed color conversion using error diffusion

Synopsis

cc [ flag... ] file... –lmlib [ library... ]
#include <mlib.h>

mlib_status mlib_ImageColorErrorDiffusion3x3(mlib_image *dst,
     const mlib_image *src, const mlib_s32 *kernel, mlib_s32 scale,
     const void *colormap);

Description

The mlib_ImageColorErrorDiffusion3x3() function converts a true color image to a pseudo color image with the method of error diffusion dithering. 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 for inverse color mapping. Create it by calling the mlib_ImageColorTrue2IndexInit() function.

Parameters

The function takes the following arguments:

dst

Pointer to destination or destination image.

src

Pointer to source or source image.

kernel

Pointer to the 3x3 error-distribution kernel, in row major order.

scale

The scaling factor for kernel to convert the input integer coefficients into floating-point coefficients:

floating-point coefficient = integer coefficient * \
2**(-scale)

colormap

Internal data structure for inverse color mapping.

Return Values

The function returns MLIB_SUCCESS if successful. Otherwise it returns MLIB_FAILURE.

Attributes

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE ATTRIBUTE VALUE Interface Stability Committed MT-Level MT-Safe

See also

mlib_ImageColorOrderedDither8x8(3MLIB), mlib_ImageColorTrue2Index(3MLIB), mlib_ImageColorTrue2IndexFree(3MLIB), mlib_ImageColorTrue2IndexInit(3MLIB), attributes (5)