challenge-bot.com Git - ozzloy@gmail.com/oble/blob - oble.cpp

   1 //use the camera to aid the decision to sleep.
   2 //Copyright 2009 Daniel Watson
   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 */
  20 /*
  21          This file is part of oble.
  22
  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.
  27
  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.
  32
  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/>.
  35
  36 */
  37 #include <cv.h>
  38 #include <highgui.h>
  39 #include <stdio.h>
  40 #include <iostream>
  41 #include <time.h>
  42
  43 static time_t t_last = time(NULL);
  44 static time_t t_current = time(NULL);
  45 static time_t t_tmp = time(NULL);
  46
  47 using namespace std;
  48
  49 // argument for cvFlip(src, dest, FLIP_TYPE)
  50 #define MIRROR 1
  51
  52 CvHaarClassifierCascade* load_object_detector(const char* cascade_path)
  53 {
  54         return (CvHaarClassifierCascade*)cvLoad(cascade_path);
  55 }
  56
  57 void detect_and_draw_objects(IplImage* image,
  58                 CvHaarClassifierCascade* cascade,
  59                 int do_pyramids)
  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) */
  68         if(do_pyramids)
  69         {
  70                 small_image = cvCreateImage(cvSize(image->width/2,image->height/2),
  71                                 IPL_DEPTH_8U, 3);
  72                 cvPyrDown(image, small_image, CV_GAUSSIAN_5x5);
  73                 scale = 2;
  74         }
  75
  76         /* use the fastest variant */
  77         faces = cvHaarDetectObjects(small_image, cascade, storage, 1.2, 2,
  78                         CV_HAAR_DO_CANNY_PRUNING);
  79
  80         if(0 < faces->total)
  81         {
  82                 t_current = time(NULL);
  83         }
  84
  85         /* draw all the rectangles */
  86         for(i = 0; i < faces->total; i++)
  87         {
  88                 /* extract the rectangles only */
  89                 CvRect face = *(CvRect*)cvGetSeqElem(faces, i);
  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);
  93                 cvRectangle(image, upperLeft, bottomRight, CV_RGB(255,0,0), 3);
  94         }
  95
  96         if(small_image != image)
  97                 cvReleaseImage(&small_image);
  98         cvReleaseMemStorage(&storage);
  99 }
 100
 101 void screensave(time_t t_current)
 102 {
 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)
 108         {
 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 }
 125
 126 // A Simple Camera Capture Framework.
 127 int main(int argc, char** argv)
 128 {
 129         CvHaarClassifierCascade* cascade = load_object_detector(argv[1]);
 130
 131         CvCapture* capture = cvCaptureFromCAM(CV_CAP_ANY);
 132         if(!capture) {
 133                 cerr << "ERROR: capture is NULL " << endl;
 134                 getchar();
 135                 return -1;
 136         }
 137
 138         // Create a window in which the captured images will be presented
 139         cvNamedWindow("mywindow", CV_WINDOW_AUTOSIZE);
 140
 141         IplImage* frame = cvQueryFrame(capture);
 142         if(!frame) {
 143                 cerr << "ERROR: frame is null..." << endl;
 144                 getchar();
 145                 return -1;
 146         }
 147         IplImage* mirrored =
 148                 cvCreateImage(cvGetSize(frame), frame->depth, frame->nChannels);
 149         t_current = time(NULL);
 150         // Show the image captured from the camera in the window and repeat
 151         while(1) {
 152                 // Get one frame
 153                 frame = cvQueryFrame(capture);
 154                 if(!frame) {
 155                         cerr << "ERROR: frame is null..." << endl;
 156                         getchar();
 157                         break;
 158                 }
 159
 160                 //flip the image so displayed right/left corresponds to physical right/left
 161                 cvFlip(frame, mirrored, MIRROR);
 162
 163                 detect_and_draw_objects(mirrored, cascade, 1);
 164                 cvShowImage("mywindow", mirrored);
 165                 // Do not release the frame!
 166                 screensave(t_current);
 167
 168                 //If ESC key pressed, Key=0x10001B under OpenCV 0.9.7(linux version),
 169                 //remove higher bits using AND operator
 170                 if((cvWaitKey(100) & 255) == 27) break;
 171         }
 172
 173         // Release the capture device housekeeping
 174         cvReleaseCapture(&capture);
 175         cvDestroyWindow("mywindow");
 176         cvReleaseImage(&mirrored);
 177         return 0;
 178 }