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 #include "oble.h"
  43
  44 using namespace std;
  45
  46 // argument for cvFlip(src, dest, FLIP_TYPE)
  47 #define MIRROR 1
  48
  49 CvHaarClassifierCascade* load_object_detector(const char* cascade_path)
  50 {
  51         return (CvHaarClassifierCascade*)cvLoad(cascade_path);
  52 }
  53
  54 void detect_and_draw_objects(IplImage* image,
  55                 CvHaarClassifierCascade* cascade,
  56                 int do_pyramids)
  57 {
  58         IplImage* small_image = image;
  59         CvMemStorage* storage = cvCreateMemStorage(0);
  60         CvSeq* faces;
  61         int i, scale = 1;
  62
  63         /* if the flag is specified, down-scale the input image to get a
  64                  performance boost w/o loosing quality (perhaps) */
  65         if(do_pyramids)
  66         {
  67                 small_image = cvCreateImage(cvSize(image->width/2,image->height/2),
  68                                 IPL_DEPTH_8U, 3);
  69                 cvPyrDown(image, small_image, CV_GAUSSIAN_5x5);
  70                 scale = 2;
  71         }
  72
  73         /* use the fastest variant */
  74         faces = cvHaarDetectObjects(small_image, cascade, storage, 1.2, 2,
  75                         CV_HAAR_DO_CANNY_PRUNING);
  76
  77         if(0 < faces->total)
  78         {
  79                 t_current = time(NULL);
  80         }
  81
  82         /* draw all the rectangles */
  83         for(i = 0; i < faces->total; i++)
  84         {
  85                 /* extract the rectangles only */
  86                 CvRect face = *(CvRect*)cvGetSeqElem(faces, i);
  87                 CvPoint upperLeft = cvPoint(face.x * scale, face.y * scale);
  88                 CvPoint bottomRight = cvPoint((face.x + face.width) * scale,
  89                                 (face.y + face.height) * scale);
  90                 cvRectangle(image, upperLeft, bottomRight, CV_RGB(255,0,0), 3);
  91         }
  92
  93         if(small_image != image)
  94                 cvReleaseImage(&small_image);
  95         cvReleaseMemStorage(&storage);
  96 }
  97
  98 void screensave(time_t t_current)
  99 {
 100         static int last_elapse = 0;
 101         static int activated = 0;
 102         int elapse = difftime(time(NULL), t_current);
 103         int timeout = 10;
 104         if(elapse > timeout && elapse != last_elapse)
 105         {
 106                 last_elapse = elapse;
 107                 printf("elapse = %d\n", elapse);
 108                 if(!activated)
 109                 {
 110                         printf("activated\n");
 111                         activated = 1;
 112                         system("gnome-screensaver-command -a");
 113                 }
 114         }
 115         if(elapse < timeout && activated)
 116         {
 117                 printf("deactivated\n");
 118                 activated = 0;
 119                 system("gnome-screensaver-command -d");
 120         }
 121 }
 122
 123 // A Simple Camera Capture Framework.
 124 int main(int argc, char** argv)
 125 {
 126         CvHaarClassifierCascade* cascade = load_object_detector(argv[1]);
 127
 128         CvCapture* capture = cvCaptureFromCAM(CV_CAP_ANY);
 129         if(!capture) {
 130                 cerr << "ERROR: capture is NULL " << endl;
 131                 getchar();
 132                 return -1;
 133         }
 134
 135         // Create a window in which the captured images will be presented
 136         cvNamedWindow("mywindow", CV_WINDOW_AUTOSIZE);
 137
 138         IplImage* frame = cvQueryFrame(capture);
 139         if(!frame) {
 140                 cerr << "ERROR: frame is null..." << endl;
 141                 getchar();
 142                 return -1;
 143         }
 144         IplImage* mirrored =
 145                 cvCreateImage(cvGetSize(frame), frame->depth, frame->nChannels);
 146         t_current = time(NULL);
 147         // Show the image captured from the camera in the window and repeat
 148         while(1) {
 149                 // Get one frame
 150                 frame = cvQueryFrame(capture);
 151                 if(!frame) {
 152                         cerr << "ERROR: frame is null..." << endl;
 153                         getchar();
 154                         break;
 155                 }
 156
 157                 //flip the image so displayed right/left corresponds to physical right/left
 158                 cvFlip(frame, mirrored, MIRROR);
 159
 160                 detect_and_draw_objects(mirrored, cascade, 1);
 161                 cvShowImage("mywindow", mirrored);
 162                 // Do not release the frame!
 163                 screensave(t_current);
 164
 165                 //If ESC key pressed, Key=0x10001B under OpenCV 0.9.7(linux version),
 166                 //remove higher bits using AND operator
 167                 if((cvWaitKey(100) & 255) == 27) break;
 168         }
 169
 170         // Release the capture device housekeeping
 171         cvReleaseCapture(&capture);
 172         cvDestroyWindow("mywindow");
 173         cvReleaseImage(&mirrored);
 174         return 0;
 175 }