a92408ab |
1 | //use the camera to aid the decision to sleep. |
2 | //Copyright 2009 Daniel Watson |
ccb0e7df |
3 | /* |
4 | use a camera to prevent screensaver |
5 | Copyright (C) 2009 daniel watson, ozzloy@gmail.com |
6 | |
7 | This program is free software: you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by |
9 | the Free Software Foundation, either version 3 of the License, or |
10 | (at your option) any later version. |
11 | |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 | GNU General Public License for more details. |
16 | |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. |
19 | */ |
a92408ab |
20 | /* |
4d640880 |
21 | This file is part of oble. |
a92408ab |
22 | |
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23 | oble is free software: you can redistribute it and/or modify |
24 | it under the terms of the GNU General Public License as published by |
25 | the Free Software Foundation, either version 3 of the License, or |
26 | (at your option) any later version. |
a92408ab |
27 | |
4d640880 |
28 | oble is distributed in the hope that it will be useful, |
29 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
30 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
31 | GNU General Public License for more details. |
a92408ab |
32 | |
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33 | You should have received a copy of the GNU General Public License |
34 | along with oble. If not, see <http://www.gnu.org/licenses/>. |
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35 | |
4d640880 |
36 | */ |
b7e484d5 |
37 | #include <cv.h> |
38 | #include <highgui.h> |
39 | #include <stdio.h> |
4d640880 |
40 | #include <iostream> |
e0c48375 |
41 | #include <time.h> |
b8b01547 |
42 | |
e0c48375 |
43 | static time_t t_last = time(NULL); |
44 | static time_t t_current = time(NULL); |
45 | static time_t t_tmp = time(NULL); |
b8b01547 |
46 | |
e0c48375 |
47 | using namespace std; |
b7e484d5 |
48 | |
0d6b136c |
49 | // argument for cvFlip(src, dest, FLIP_TYPE) |
4d640880 |
50 | #define MIRROR 1 |
0d6b136c |
51 | |
64fb0216 |
52 | CvHaarClassifierCascade* load_object_detector(const char* cascade_path) |
b7e484d5 |
53 | { |
21323a92 |
54 | return (CvHaarClassifierCascade*)cvLoad(cascade_path); |
b7e484d5 |
55 | } |
56 | |
9cd4e78c |
57 | void detect_and_draw_objects(IplImage* image, |
b7e484d5 |
58 | CvHaarClassifierCascade* cascade, |
9cd4e78c |
59 | int do_pyramids) |
b7e484d5 |
60 | { |
61 | IplImage* small_image = image; |
62 | CvMemStorage* storage = cvCreateMemStorage(0); |
63 | CvSeq* faces; |
64 | int i, scale = 1; |
65 | |
66 | /* if the flag is specified, down-scale the input image to get a |
67 | performance boost w/o loosing quality (perhaps) */ |
21323a92 |
68 | if(do_pyramids) |
b7e484d5 |
69 | { |
21323a92 |
70 | small_image = cvCreateImage(cvSize(image->width/2,image->height/2), |
71 | IPL_DEPTH_8U, 3); |
72 | cvPyrDown(image, small_image, CV_GAUSSIAN_5x5); |
b7e484d5 |
73 | scale = 2; |
74 | } |
75 | |
76 | /* use the fastest variant */ |
21323a92 |
77 | faces = cvHaarDetectObjects(small_image, cascade, storage, 1.2, 2, |
78 | CV_HAAR_DO_CANNY_PRUNING); |
b7e484d5 |
79 | |
4d640880 |
80 | if(0 < faces->total) |
b8b01547 |
81 | { |
e0c48375 |
82 | t_current = time(NULL); |
b8b01547 |
83 | } |
b8b01547 |
84 | |
b7e484d5 |
85 | /* draw all the rectangles */ |
21323a92 |
86 | for(i = 0; i < faces->total; i++) |
b7e484d5 |
87 | { |
88 | /* extract the rectangles only */ |
21323a92 |
89 | CvRect face = *(CvRect*)cvGetSeqElem(faces, i); |
79292335 |
90 | CvPoint upperLeft = cvPoint(face.x * scale, face.y * scale); |
91 | CvPoint bottomRight = cvPoint((face.x + face.width) * scale, |
92 | (face.y + face.height) * scale); |
21323a92 |
93 | cvRectangle(image, upperLeft, bottomRight, CV_RGB(255,0,0), 3); |
b7e484d5 |
94 | } |
95 | |
21323a92 |
96 | if(small_image != image) |
97 | cvReleaseImage(&small_image); |
98 | cvReleaseMemStorage(&storage); |
b7e484d5 |
99 | } |
100 | |
e0c48375 |
101 | void screensave(time_t t_current) |
b7e484d5 |
102 | { |
e0c48375 |
103 | static int last_elapse = 0; |
104 | static int activated = 0; |
105 | int elapse = difftime(time(NULL), t_current); |
106 | int timeout = 10; |
107 | if(elapse > timeout && elapse != last_elapse) |
b8b01547 |
108 | { |
e0c48375 |
109 | last_elapse = elapse; |
110 | printf("elapse = %d\n", elapse); |
111 | if(!activated) |
112 | { |
113 | printf("activated\n"); |
114 | activated = 1; |
115 | system("gnome-screensaver-command -a"); |
116 | } |
117 | } |
118 | if(elapse < timeout && activated) |
119 | { |
120 | printf("deactivated\n"); |
121 | activated = 0; |
122 | system("gnome-screensaver-command -d"); |
123 | } |
124 | } |
b8b01547 |
125 | |
e0c48375 |
126 | // A Simple Camera Capture Framework. |
127 | int main(int argc, char** argv) |
128 | { |
b7e484d5 |
129 | CvHaarClassifierCascade* cascade = load_object_detector(argv[1]); |
130 | |
21323a92 |
131 | CvCapture* capture = cvCaptureFromCAM(CV_CAP_ANY); |
132 | if(!capture) { |
4d640880 |
133 | cerr << "ERROR: capture is NULL " << endl; |
b7e484d5 |
134 | getchar(); |
135 | return -1; |
136 | } |
137 | |
138 | // Create a window in which the captured images will be presented |
21323a92 |
139 | cvNamedWindow("mywindow", CV_WINDOW_AUTOSIZE); |
b7e484d5 |
140 | |
0d6b136c |
141 | IplImage* frame = cvQueryFrame(capture); |
142 | if(!frame) { |
4d640880 |
143 | cerr << "ERROR: frame is null..." << endl; |
0d6b136c |
144 | getchar(); |
145 | return -1; |
146 | } |
b8b01547 |
147 | IplImage* mirrored = |
0d6b136c |
148 | cvCreateImage(cvGetSize(frame), frame->depth, frame->nChannels); |
e0c48375 |
149 | t_current = time(NULL); |
b7e484d5 |
150 | // Show the image captured from the camera in the window and repeat |
21323a92 |
151 | while(1) { |
b7e484d5 |
152 | // Get one frame |
0d6b136c |
153 | frame = cvQueryFrame(capture); |
21323a92 |
154 | if(!frame) { |
4d640880 |
155 | cerr << "ERROR: frame is null..." << endl; |
b7e484d5 |
156 | getchar(); |
157 | break; |
158 | } |
159 | |
21323a92 |
160 | //flip the image so displayed right/left corresponds to physical right/left |
4d640880 |
161 | cvFlip(frame, mirrored, MIRROR); |
64fb0216 |
162 | |
b8b01547 |
163 | detect_and_draw_objects(mirrored, cascade, 1); |
164 | cvShowImage("mywindow", mirrored); |
b7e484d5 |
165 | // Do not release the frame! |
e0c48375 |
166 | screensave(t_current); |
b7e484d5 |
167 | |
168 | //If ESC key pressed, Key=0x10001B under OpenCV 0.9.7(linux version), |
169 | //remove higher bits using AND operator |
e0c48375 |
170 | if((cvWaitKey(100) & 255) == 27) break; |
b7e484d5 |
171 | } |
172 | |
173 | // Release the capture device housekeeping |
21323a92 |
174 | cvReleaseCapture(&capture); |
175 | cvDestroyWindow("mywindow"); |
b8b01547 |
176 | cvReleaseImage(&mirrored); |
b7e484d5 |
177 | return 0; |
178 | } |