1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef bim_HISTOEQ_EM_H
18#define bim_HISTOEQ_EM_H
19
20/* ---- includes ----------------------------------------------------------- */
21
22#include "b_BasicEm/Context.h"
23#include "b_ImageEm/UInt8Image.h"
24
25/* ---- related objects  --------------------------------------------------- */
26
27struct bim_UInt8Image;
28struct bts_Int16Rect;
29
30/* ---- typedefs ----------------------------------------------------------- */
31
32/* ---- constants ---------------------------------------------------------- */
33
34/* ---- external functions ------------------------------------------------- */
35
36/** Histogram equalization of image */
37void bim_UInt8Image_equalize( struct bbs_Context* cpA,
38							  struct bim_UInt8Image* imagePtrA );
39
40/** Histogram equalization using histogram generated from subregion.
41  * While the histogram is taken only in the specified sub-section of the
42  * image, the equalization, i.e. remapping of the pixel values, is
43  * performed on the whole image.
44  *
45  * @param imagePtrA    pointer to image to be equalized
46  * @param sectionPtrA  section specifying region in image where histogram is
47  *                     generated from
48  */
49void bim_UInt8Image_equalizeSection( struct bbs_Context* cpA,
50									 struct bim_UInt8Image* imagePtrA,
51									 const struct bts_Int16Rect* sectionPtrA );
52
53/* ------------------------------------------------------------------------- */
54
55#endif /* bim_HISTOEQ_EM_H */
56
57