man pages section 3: Multimedia Library Functions

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Updated: July 2014
 
 

mlib_ImageColorRGB2Mono_Fp(3MLIB)

Name

mlib_ImageColorRGB2Mono_Fp - RGB to monochrome conversion

Synopsis

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

mlib_status mlib_ImageColorRGB2Mono_Fp(mlib_image *dst,
     const mlib_image *src, const mlib_d64 *weight);

Description

The mlib_ImageColorRGB2Mono_Fp() function performs a conversion from a red/green/blue to a monochromatic image. The source image must be a three-channel image. The destination image must be a single-channel image.

It uses the following equation:

dst[x][y][0] = weight[0]*src[x][y][0] +
               weight[1]*src[x][y][1] +
               weight[2]*src[x][y][2]

Parameters

The function takes the following arguments:

dst

Pointer to destination image.

src

Pointer to source image.

weight

Array of three blending coefficients. It is recommended that these sum to 1.0, but it is not required.

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_ImageColorRGB2CIEMono(3MLIB), mlib_ImageColorRGB2CIEMono_Fp(3MLIB), mlib_ImageColorRGB2Mono(3MLIB), attributes(5)