1 | /* |
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2 | Copyright (C) 2006 Pedro Felzenszwalb |
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3 | |
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4 | This program is free software; you can redistribute it and/or modify |
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5 | it under the terms of the GNU General Public License as published by |
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6 | the Free Software Foundation; either version 2 of the License, or |
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7 | (at your option) any later version. |
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8 | |
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9 | This program is distributed in the hope that it will be useful, |
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10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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12 | GNU General Public License for more details. |
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13 | |
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14 | You should have received a copy of the GNU General Public License |
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15 | along with this program; if not, write to the Free Software |
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16 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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17 | */ |
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18 | |
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19 | /* some image utilities */ |
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20 | |
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21 | #ifndef IMUTIL_H |
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22 | #define IMUTIL_H |
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23 | |
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24 | #include "image.h" |
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25 | #include "misc.h" |
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26 | |
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27 | /* compute minimum and maximum value in an image */ |
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28 | /*template <class T> |
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29 | void min_max(image<T> *im, T *ret_min, T *ret_max) { |
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30 | int width = im->width(); |
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31 | int height = im->height(); |
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32 | |
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33 | T min = imRef(im, 0, 0); |
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34 | T max = imRef(im, 0, 0); |
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35 | for (int y = 0; y < height; y++) { |
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36 | for (int x = 0; x < width; x++) { |
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37 | T val = imRef(im, x, y); |
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38 | if (min > val) |
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39 | min = val; |
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40 | if (max < val) |
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41 | max = val; |
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42 | } |
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43 | } |
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44 | |
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45 | *ret_min = min; |
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46 | *ret_max = max; |
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47 | } |
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48 | */ |
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49 | void min_max(imagef *im, float *ret_min, float *ret_max) { |
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50 | int width = im->w; |
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51 | int height = im->h; |
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52 | |
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53 | float min = imRef(im, 0, 0); |
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54 | float max = imRef(im, 0, 0); |
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55 | for (int y = 0; y < height; y++) { |
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56 | for (int x = 0; x < width; x++) { |
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57 | float val = imRef(im, x, y); |
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58 | if (min > val) |
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59 | min = val; |
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60 | if (max < val) |
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61 | max = val; |
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62 | } |
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63 | } |
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64 | |
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65 | *ret_min = min; |
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66 | *ret_max = max; |
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67 | } |
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68 | |
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69 | |
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70 | /* threshold image */ |
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71 | /* |
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72 | template <class T> |
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73 | image<uchar> *threshold(image<T> *src, int t) { |
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74 | int width = src->width(); |
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75 | int height = src->height(); |
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76 | image<uchar> *dst = new image<uchar>(width, height); |
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77 | |
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78 | for (int y = 0; y < height; y++) { |
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79 | for (int x = 0; x < width; x++) { |
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80 | imRef(dst, x, y) = (imRef(src, x, y) >= t); |
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81 | } |
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82 | } |
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83 | |
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84 | return dst; |
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85 | } |
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86 | */ |
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87 | /* |
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88 | image<uchar> *threshold(image<T> *src, int t) { |
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89 | int width = src->width(); |
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90 | int height = src->height(); |
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91 | image<uchar> *dst = new image<uchar>(width, height); |
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92 | |
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93 | for (int y = 0; y < height; y++) { |
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94 | for (int x = 0; x < width; x++) { |
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95 | imRef(dst, x, y) = (imRef(src, x, y) >= t); |
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96 | } |
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97 | } |
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98 | |
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99 | return dst; |
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100 | } |
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101 | */ |
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102 | #endif |
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103 | |
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