histogram_equalization 0.2.4

Histogram equalization
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208

use crate::clahe_impl::clahe_impl_u16;
use crate::hist_support::AheImplementation;
use crate::luv::{bgra_to_luv, luv_to_bgra, luv_to_rgb, luv_to_rgba, rgb_to_luv, rgba_to_luv};
use crate::ClaheGridSize;

/// Converts image to LUV, performs CLAHE and reverts back into RGB
///
/// # Arguments
///
/// * `threshold` - Level of clipping histogram ~[0, 10]
/// * `grid_size` - Grid for constructing histograms - default is (8,8)
/// * `bins_count` - Histogram bins, default is 128
///
/// # Panics
///
/// This function panics if the lengths of the planes or the input data are not valid based
/// on the specified width, height, and strides
pub fn clahe_luv_rgb(
    src: &[u8],
    src_stride: u32,
    dst: &mut [u8],
    dst_stride: u32,
    width: u32,
    height: u32,
    threshold: f32,
    grid_size: ClaheGridSize,
    bins_count: usize,
) {
    clahe_impl_u16::<3, 0, { AheImplementation::Clahe as u8 }>(
        src, src_stride, dst, dst_stride, width, height, threshold, grid_size, bins_count,
        rgb_to_luv, luv_to_rgb,
    );
}

/// Converts image to LUV, performs AHE and reverts back into RGB
///
/// # Arguments
///
/// * `grid_size` - Grid for constructing histograms - default is (8,8)
/// * `bins_count` - Histogram bins, default is 128
///
/// # Panics
///
/// This function panics if the lengths of the planes or the input data are not valid based
/// on the specified width, height, and strides
pub fn ahe_luv_rgb(
    src: &[u8],
    src_stride: u32,
    dst: &mut [u8],
    dst_stride: u32,
    width: u32,
    height: u32,
    grid_size: ClaheGridSize,
    bins_count: usize,
) {
    clahe_impl_u16::<3, 0, { AheImplementation::Ahe as u8 }>(
        src, src_stride, dst, dst_stride, width, height, 0f32, grid_size, bins_count, rgb_to_luv,
        luv_to_rgb,
    );
}

/// Converts image to LUV, performs CLAHE and reverts back into RGBA
///
/// # Arguments
///
/// * `threshold` - Level of clipping histogram ~[0, 10]
/// * `grid_size` - Grid for constructing histograms - default is (8,8)
/// * `bins_count` - Histogram bins, default is 128
///
/// # Panics
///
/// This function panics if the lengths of the planes or the input data are not valid based
/// on the specified width, height, and strides
pub fn clahe_luv_rgba(
    src: &[u8],
    src_stride: u32,
    dst: &mut [u8],
    dst_stride: u32,
    width: u32,
    height: u32,
    threshold: f32,
    grid_size: ClaheGridSize,
    bins_count: usize,
) {
    clahe_impl_u16::<4, 0, { AheImplementation::Clahe as u8 }>(
        src,
        src_stride,
        dst,
        dst_stride,
        width,
        height,
        threshold,
        grid_size,
        bins_count,
        rgba_to_luv,
        luv_to_rgba,
    );
}

/// Converts image to LUV, performs AHE and reverts back into RGB
///
/// # Arguments
///
/// * `grid_size` - Grid for constructing histograms - default is (8,8)
/// * `bins_count` - Histogram bins, default is 128
///
/// # Panics
///
/// This function panics if the lengths of the planes or the input data are not valid based
/// on the specified width, height, and strides
pub fn ahe_luv_rgba(
    src: &[u8],
    src_stride: u32,
    dst: &mut [u8],
    dst_stride: u32,
    width: u32,
    height: u32,
    grid_size: ClaheGridSize,
    bins_count: usize,
) {
    clahe_impl_u16::<4, 0, { AheImplementation::Ahe as u8 }>(
        src,
        src_stride,
        dst,
        dst_stride,
        width,
        height,
        0f32,
        grid_size,
        bins_count,
        rgba_to_luv,
        luv_to_rgba,
    );
}

/// Converts image to LUV, performs CLAHE and reverts back into BGRA
///
/// # Arguments
///
/// * `threshold` - Level of clipping histogram ~[0, 10]
/// * `grid_size` - Grid for constructing histograms - default is (8,8)
/// * `bins_count` - Histogram bins, default is 128
///
/// # Panics
///
/// This function panics if the lengths of the planes or the input data are not valid based
/// on the specified width, height, and strides
pub fn clahe_luv_bgra(
    src: &[u8],
    src_stride: u32,
    dst: &mut [u8],
    dst_stride: u32,
    width: u32,
    height: u32,
    threshold: f32,
    grid_size: ClaheGridSize,
    bins_count: usize,
) {
    clahe_impl_u16::<4, 0, { AheImplementation::Clahe as u8 }>(
        src,
        src_stride,
        dst,
        dst_stride,
        width,
        height,
        threshold,
        grid_size,
        bins_count,
        bgra_to_luv,
        luv_to_bgra,
    );
}

/// Converts image to LUV, performs AHE and reverts back into RGB
///
/// # Arguments
///
/// * `grid_size` - Grid for constructing histograms - default is (8,8)
/// * `bins_count` - Histogram bins, default is 128
///
/// # Panics
///
/// This function panics if the lengths of the planes or the input data are not valid based
/// on the specified width, height, and strides
pub fn ahe_luv_bgra(
    src: &[u8],
    src_stride: u32,
    dst: &mut [u8],
    dst_stride: u32,
    width: u32,
    height: u32,
    grid_size: ClaheGridSize,
    bins_count: usize,
) {
    clahe_impl_u16::<4, 0, { AheImplementation::Ahe as u8 }>(
        src,
        src_stride,
        dst,
        dst_stride,
        width,
        height,
        0f32,
        grid_size,
        bins_count,
        bgra_to_luv,
        luv_to_bgra,
    );
}