mlib_ImageDivConstShift_Inp - division by a constant, with shifting
cc [ flag... ] file... –lmlib [ library... ]
#include <mlib.h>
mlib_status mlib_ImageDivConstShift_Inp(mlib_image *srcdst,
const mlib_s32 *c, mlib_s32 shift);
The mlib_ImageDivConstShift_Inp() function divides each pixel in an image by a constant value on a pixel-by-pixel basis, in place. It scales the result by a left shift and writes the result to the image on a pixel-by-pixel basis.
It uses the following equation:
srcdst[x][y][i] = srcdst[x][y][i] / c[i] * 2**shift
In the case of c[i] = 0,
srcdst[x][y][i] = 0 if srcdst[x][y][i] = 0 srcdst[x][y][i] = DATA_TYPE_MAX if srcdst[x][y][i] > 0 srcdst[x][y][i] = DATA_TYPE_MIN if srcdst[x][y][i] < 0
where DATA_TYPE is MLIB_U8, MLIB_S16, MLIB_U16, or MLIB_S32 for an image of type MLIB_BYTE, MLIB_SHORT, MLIB_USHORT, or MLIB_INT, respectively.
The function takes the following arguments:
Pointer to source and destination image.
Constant by which each pixel is divided. c[i] contains the constant for channel i.
Left shifting factor. 0 ≤ shift ≤ 31.
The function returns MLIB_SUCCESS if successful. Otherwise it returns MLIB_FAILURE.
See attributes(5) for descriptions of the following attributes:
|