1mlib_ImageThresh1(3MLIB) mediaLib Library Functions mlib_ImageThresh1(3MLIB)
2
3
4
6 mlib_ImageThresh1 - image thresholding
7
9 cc [ flag... ] file... -lmlib [ library... ]
10 #include <mlib.h>
11
12 mlib_status mlib_ImageThresh1(mlib_image *dst, const mlib_image *src,
13 const mlib_s32 *thresh, const mlib_s32 *ghigh, const mlib_s32 *glow);
14
15
17 The mlib_ImageThresh1() function compares each pixel in the source
18 image to a threshold value. If the pixel is less than or equal to the
19 threshold value, then the destination pixel is set to the low output
20 level. If the pixel is greater than the threshold value, then the des‐
21 tination pixel is set to the high output level.
22
23
24 The data type of the destination image can be MLIB_BIT or can be the
25 same as the data type of the source image.
26
27
28 It uses the following equation:
29
30 dst[x][y][i] = glow[i] if src[x][y][i] ≤ thresh[i]
31 dst[x][y][i] = ghigh[i] if src[x][y][i] > thresh[i]
32
33
35 The function takes the following arguments:
36
37 dst Pointer to destination image.
38
39
40 src Pointer to source image.
41
42
43 thresh Threshold value. thresh[i] contains the threshold for channel
44 i.
45
46
47 ghigh High output level. ghigh[i] contains the high output level
48 for channel i.
49
50
51 glow Low output level. glow[i] contains the low output level for
52 channel i.
53
54
56 The function returns MLIB_SUCCESS if successful. Otherwise it returns
57 MLIB_FAILURE.
58
60 See attributes(5) for descriptions of the following attributes:
61
62
63
64
65 ┌─────────────────────────────┬─────────────────────────────┐
66 │ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
67 ├─────────────────────────────┼─────────────────────────────┤
68 │Interface Stability │Committed │
69 ├─────────────────────────────┼─────────────────────────────┤
70 │MT-Level │MT-Safe │
71 └─────────────────────────────┴─────────────────────────────┘
72
74 mlib_ImageThresh1_Fp(3MLIB), mlib_ImageThresh1_Fp_Inp(3MLIB),
75 mlib_ImageThresh1_Inp(3MLIB), mlib_ImageThresh2(3MLIB), mlib_ImageTh‐
76 resh2_Fp(3MLIB), mlib_ImageThresh2_Fp_Inp(3MLIB), mlib_ImageTh‐
77 resh2_Inp(3MLIB), mlib_ImageThresh3(3MLIB), mlib_ImageTh‐
78 resh3_Fp(3MLIB), mlib_ImageThresh3_Fp_Inp(3MLIB), mlib_ImageTh‐
79 resh3_Inp(3MLIB), mlib_ImageThresh4(3MLIB), mlib_ImageTh‐
80 resh4_Fp(3MLIB), mlib_ImageThresh4_Fp_Inp(3MLIB), mlib_ImageTh‐
81 resh4_Inp(3MLIB), mlib_ImageThresh5(3MLIB), mlib_ImageTh‐
82 resh5_Fp(3MLIB), mlib_ImageThresh5_Fp_Inp(3MLIB), mlib_ImageTh‐
83 resh5_Inp(3MLIB), attributes(5)
84
85
86
87SunOS 5.11 2 Mar 2007 mlib_ImageThresh1(3MLIB)