man pages section 3: Multimedia Library Functions

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Updated: July 2014
 
 

mlib_ImageMean_Fp (3MLIB)

Name

mlib_ImageMean_Fp - image mean

Synopsis

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

mlib_status mlib_ImageMean_Fp(mlib_d64 *mean, const mlib_image *img);

Description

The mlib_ImageMean_Fp() function computes the mean value of all the pixels in the image.

It uses the following equation:

            1     w-1 h-1
mean[i] = ----- * SUM SUM img[x][y][i]
           w*h    x=0 y=0

Parameters

The function takes the following arguments:

mean

Pointer to mean array, where length is the number of channels in the image. mean[i] contains the mean of channel i.

img

Pointer to an image.

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_ImageMean(3MLIB), mlib_ImageStdDev(3MLIB), mlib_ImageStdDev_Fp(3MLIB), attributes(5)