mlib_ImageThresh4_Fp(3MLIBmediaLib Library Functionmlib_ImageThresh4_Fp(3MLIB)NAMEmlib_ImageThresh4_Fp - image thresholding
SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ]
#include <mlib.h>
mlib_status mlib_ImageThresh4_Fp(mlib_image *dst, const mlib_image *src,
const mlib_d64 *thigh, const mlib_d64 *tlow, const mlib_d64 *ghigh,
const mlib_d64 *glow);
DESCRIPTION
The mlib_ImageThresh4_Fp() function compares each pixel in the source
image to two threshold values, tlow and thigh. If the pixel is less
than the lower threshold value, tlow, then the destination pixel is set
to the lower output level, glow. If the pixel is greater than the
higher threshold value, thigh, then the destination pixel is set to the
higher output level, ghigh. Otherwise, the destination pixel is set to
the value of the source pixel.
It uses the following equation:
dst[x][y][i] = glow[i] if src[x][y][i] < tlow[i]
dst[x][y][i] = src[x][y][i] if tlow[i] ≤ src[x][y][i] ≤ thigh[i]
dst[x][y][i] = ghigh[i] if src[x][y][i] > thigh[i]
PARAMETERS
The function takes the following arguments:
dst Pointer to destination image.
src Pointer to source image.
thigh High threshold value. thigh[i] holds the high threshold for
channel i.
tlow Low threshold value. tlow[i] holds the low threshold for
channel i.
ghigh High output grayscale level. ghigh[i] holds the high output
grayscale level for channel i.
glow Low output grayscale level. glow[i] holds the low output
grayscale level for channel i.
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 ALSOmlib_ImageThresh1(3MLIB), mlib_ImageThresh1_Fp(3MLIB), mlib_ImageTh‐
resh1_Fp_Inp(3MLIB), mlib_ImageThresh1_Inp(3MLIB), mlib_ImageTh‐
resh2(3MLIB), mlib_ImageThresh2_Fp(3MLIB), mlib_ImageTh‐
resh2_Fp_Inp(3MLIB), mlib_ImageThresh2_Inp(3MLIB), mlib_ImageTh‐
resh3(3MLIB), mlib_ImageThresh3_Fp(3MLIB), mlib_ImageTh‐
resh3_Fp_Inp(3MLIB), mlib_ImageThresh3_Inp(3MLIB), mlib_ImageTh‐
resh4(3MLIB), mlib_ImageThresh4_Fp_Inp(3MLIB), mlib_ImageTh‐
resh4_Inp(3MLIB), mlib_ImageThresh5(3MLIB), mlib_ImageTh‐
resh5_Fp(3MLIB), mlib_ImageThresh5_Fp_Inp(3MLIB), mlib_ImageTh‐
resh5_Inp(3MLIB), attributes(5)SunOS 5.10 2 Mar 2007 mlib_ImageThresh4_Fp(3MLIB)
