cc [ flag... ] file... –lmlib [ library... ]
#include <mlib.h>
mlib_status mlib_ImageThresh5(mlib_image *dst, const mlib_image *src,
const mlib_s32 *thigh, const mlib_s32 *tlow, const mlib_s32 *gray);
The mlib_ImageThresh5() function compares each pixel in the source image to two threshold values, tlow and thigh. If the pixel is in between the lower threshold value, tlow, and the higher threshold value, thigh, (inclusive on both sides), then the destination pixel is set to the value gray. Otherwise, the destination pixel is set to the value of the source pixel.
It uses the following equation:
dst[x][y][i] = src[x][y][i] if src[x][y][i] < tlow[i] dst[x][y][i] = gray[i] if tlow[i] ≤ src[x][y][i] ≤ thigh[i] dst[x][y][i] = src[x][y][i] if src[x][y][i] > thigh[i]
The function takes the following arguments:
Pointer to destination image.
Pointer to source image.
High threshold value. thigh[i] holds the high threshold for channel i.
Low threshold value. tlow[i] holds the low threshold for channel i.
Output grayscale level. gray[i] holds the output grayscale level for channel i.
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_ImageThresh1(3MLIB), mlib_ImageThresh1_Fp(3MLIB), mlib_ImageThresh1_Fp_Inp(3MLIB), mlib_ImageThresh1_Inp(3MLIB), mlib_ImageThresh2(3MLIB), mlib_ImageThresh2_Fp(3MLIB), mlib_ImageThresh2_Fp_Inp(3MLIB), mlib_ImageThresh2_Inp(3MLIB), mlib_ImageThresh3(3MLIB), mlib_ImageThresh3_Fp(3MLIB), mlib_ImageThresh3_Fp_Inp(3MLIB), mlib_ImageThresh3_Inp(3MLIB), mlib_ImageThresh4(3MLIB), mlib_ImageThresh4_Fp(3MLIB), mlib_ImageThresh4_Fp_Inp(3MLIB), mlib_ImageThresh4_Inp(3MLIB), mlib_ImageThresh5_Fp(3MLIB), mlib_ImageThresh5_Fp_Inp(3MLIB), mlib_ImageThresh5_Inp(3MLIB), attributes(5)