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1 | //use the camera to aid the decision to sleep. |
2 | //Copyright 2009 Daniel Watson |
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3 | /* |
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4 | This file is part of oble. |
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5 | |
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6 | oble is free software: you can redistribute it and/or modify |
7 | it under the terms of the GNU General Public License as published by |
8 | the Free Software Foundation, either version 3 of the License, or |
9 | (at your option) any later version. |
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10 | |
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11 | oble is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | GNU General Public License for more details. |
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15 | |
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16 | You should have received a copy of the GNU General Public License |
17 | along with oble. If not, see <http://www.gnu.org/licenses/>. |
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18 | |
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19 | */ |
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20 | #include <cv.h> |
21 | #include <highgui.h> |
22 | #include <stdio.h> |
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23 | #include <iostream> |
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24 | #include <time.h> |
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25 | #include <unistd.h> |
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26 | #include "oble.h" |
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27 | #include "idle_x11.h" |
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28 | |
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29 | using namespace std; |
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30 | |
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31 | static string cascade_filename = ""; |
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32 | static int verbose = 0; |
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33 | |
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34 | // argument for cvFlip(src, dest, FLIP_TYPE) |
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35 | #define MIRROR 1 |
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36 | |
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37 | CvHaarClassifierCascade* load_object_detector(const char* cascade_path) |
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38 | { |
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39 | return (CvHaarClassifierCascade*)cvLoad(cascade_path); |
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40 | } |
41 | |
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42 | void detect_and_draw_objects(IplImage* image, |
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43 | CvHaarClassifierCascade* cascade, |
44 | int do_pyramids) |
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45 | { |
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46 | IplImage* small_image = image; |
47 | CvMemStorage* storage = cvCreateMemStorage(0); |
48 | CvSeq* faces; |
49 | int i, scale = 1; |
50 | |
51 | /* if the flag is specified, down-scale the input image to get a |
52 | performance boost w/o loosing quality (perhaps) */ |
53 | if(do_pyramids) |
54 | { |
55 | small_image = cvCreateImage(cvSize(image->width/2, |
56 | image->height/2), |
57 | IPL_DEPTH_8U, 3); |
58 | cvPyrDown(image, small_image, CV_GAUSSIAN_5x5); |
59 | scale = 2; |
60 | } |
61 | |
62 | /* use the fastest variant */ |
63 | faces = cvHaarDetectObjects(small_image, cascade, storage, 1.2, 2, |
64 | CV_HAAR_DO_CANNY_PRUNING); |
65 | |
66 | update_idle(faces->total); |
67 | |
68 | /* draw all the rectangles */ |
69 | for(i = 0; i < faces->total; i++) |
70 | { |
71 | /* extract the rectangles only */ |
72 | CvRect face = *(CvRect*)cvGetSeqElem(faces, i); |
73 | CvPoint upperLeft = cvPoint(face.x * scale, face.y * scale); |
74 | CvPoint bottomRight = cvPoint((face.x + face.width) * scale, |
75 | (face.y + face.height) * scale); |
76 | cvRectangle(image, upperLeft, bottomRight, CV_RGB(255,0,0), 3); |
77 | } |
78 | |
79 | if(small_image != image) |
80 | cvReleaseImage(&small_image); |
81 | cvReleaseMemStorage(&storage); |
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82 | } |
83 | |
84 | void update_idle(int faces_total) |
85 | { |
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86 | static int saw_last_time = 0; |
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87 | |
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88 | if(0 < faces_total) |
89 | { |
90 | t_current = time(NULL); |
91 | if(verbose) |
92 | { |
93 | printf(":) face \n"); |
94 | } |
95 | if(saw_last_time) |
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96 | { |
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97 | if(verbose)printf("\t\tpoking\n"); |
98 | reset_idle_time(); |
99 | system("gnome-screensaver-command --poke"); |
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100 | } |
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101 | saw_last_time = 1; |
102 | } |
103 | else |
104 | { |
105 | saw_last_time = 0; |
106 | if(verbose) |
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107 | { |
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108 | printf(":( no face \n"); |
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109 | } |
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110 | } |
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111 | |
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112 | } |
113 | |
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114 | void screensave(time_t t_current) |
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115 | { |
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116 | static int last_elapse = 0; |
117 | static int activated = 0; |
118 | int elapse = difftime(time(NULL), t_current); |
119 | int timeout = 10; |
120 | if(elapse > timeout && elapse != last_elapse) |
121 | { |
122 | last_elapse = elapse; |
123 | if(verbose) |
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124 | { |
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125 | printf("elapse = %d\n", elapse); |
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126 | } |
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127 | if(!activated) |
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128 | { |
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129 | printf("activated\n"); |
130 | activated = 1; |
131 | system("gnome-screensaver-command -a"); |
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132 | } |
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133 | } |
134 | if(elapse < timeout && activated) |
135 | { |
136 | printf("deactivated\n"); |
137 | activated = 0; |
138 | system("gnome-screensaver-command -d"); |
139 | } |
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140 | } |
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141 | |
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142 | int parse_opts(int argc, char **argv) |
143 | { |
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144 | int index, c; |
145 | opterr = 0; |
146 | const char *options = "vc:\x0"; |
147 | while((c = getopt(argc, argv, options)) != -1) |
148 | { |
149 | switch(c) |
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150 | { |
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151 | case 'v': verbose = 1; break; |
152 | case 'c': cascade_filename = string(optarg); break; |
153 | case '?': |
154 | if(optopt == 'c') |
155 | { |
156 | printf("option -%c requires an argument.\n", optopt); |
157 | } |
158 | else if(isprint (optopt)) |
159 | { |
160 | printf("unknown option `-%c'.\n", optopt); |
161 | } |
162 | else |
163 | { |
164 | printf("unknown option char `\\x%x'.\n", optopt); |
165 | } |
166 | break; |
167 | case '\x0': break; //ignore. not sure why this shows up. maybe zsh? |
168 | default: abort(); |
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169 | } |
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170 | } |
171 | |
172 | for(index = optind; index < argc; index++) |
173 | printf("Non-option arg %s\n", argv[index]); |
174 | |
175 | if(cascade_filename == "") |
176 | { |
177 | printf("you must supply a filename with -c option. example:\n"); |
178 | printf( |
179 | "%s -c %s\n", |
180 | argv[0], |
181 | "/usr/share/opencv/haarcascades/haarcascade_frontalface_alt.xml" |
182 | ); |
183 | return 1; |
184 | } |
185 | if(verbose) printf("SILENT ALARM ACTIVATED!!!\n"); |
186 | return 0; |
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187 | } |
188 | |
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189 | int get_frames(CvCapture* capture, CvHaarClassifierCascade* cascade) |
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190 | { |
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191 | int got_null_frame = 0; |
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192 | IplImage* frame = NULL; |
193 | get_one_frame(capture, frame); |
194 | |
195 | IplImage* mirrored = |
196 | cvCreateImage(cvGetSize(frame), frame->depth, frame->nChannels); |
197 | // Show the image captured from the camera in the window and repeat |
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198 | while(!(got_null_frame = get_one_frame(capture, frame))) |
199 | { |
200 | //so displayed right/left corresponds to physical right/left: |
201 | cvFlip(frame, mirrored, MIRROR); |
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202 | |
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203 | detect_and_draw_objects(mirrored, cascade, 1); |
204 | cvShowImage("mywindow", mirrored); |
205 | // Do not release the frame! |
206 | //screensave(t_current); |
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207 | |
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208 | //If ESC key pressed, Key=0x10001B under OpenCV 0.9.7(linux version), |
209 | //remove higher bits using AND operator |
210 | if((cvWaitKey(100) & 255) == 27) break; |
211 | } |
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212 | cvReleaseImage(&mirrored); |
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213 | return got_null_frame; |
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214 | } |
215 | |
216 | int do_capture() |
217 | { |
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218 | int got_null_capture = 0; |
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219 | CvHaarClassifierCascade* cascade = |
220 | load_object_detector(cascade_filename.c_str()); |
221 | |
222 | CvCapture* capture = cvCaptureFromCAM(CV_CAP_ANY); |
223 | if(!capture) { |
224 | cerr << "ERROR: capture is NULL " << endl; |
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225 | return 1; |
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226 | } |
227 | |
228 | // Create a window in which the captured images will be presented |
229 | cvNamedWindow("mywindow", CV_WINDOW_AUTOSIZE); |
230 | t_current = time(NULL); |
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231 | while(get_frames(capture, cascade)) |
232 | { |
233 | cerr << "resetting capture." << endl; |
234 | cvReleaseCapture( &capture ); |
235 | capture = cvCaptureFromCAM( CV_CAP_ANY ); |
236 | if(!capture) |
237 | { |
238 | got_null_capture = 1; |
239 | break; |
240 | } |
241 | } |
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242 | |
243 | // Release the capture device housekeeping |
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244 | if(!got_null_capture) |
245 | { |
246 | cvReleaseCapture(&capture); |
247 | } |
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248 | cvDestroyWindow("mywindow"); |
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249 | return got_null_capture; |
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250 | } |
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251 | |
252 | int get_one_frame(CvCapture* capture, IplImage* &frame) |
253 | { |
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254 | int got_null_frame = 0; |
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255 | frame = cvQueryFrame(capture); |
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256 | if(!frame) |
257 | { |
258 | cerr << "ERROR: frame is null..., trying again" << endl; |
259 | frame = cvQueryFrame(capture); |
260 | if(!frame) |
261 | { |
262 | cerr << "ERROR: frame is still null... maybe reset capture?" << endl; |
263 | got_null_frame = 1; |
264 | } |
265 | } |
266 | return got_null_frame; |
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267 | } |
268 | |
269 | // A Simple Camera Capture Framework. |
270 | int main(int argc, char** argv) |
271 | { |
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272 | if(parse_opts(argc, argv)) return 0; |
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273 | |
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274 | return do_capture(); |
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275 | } |