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                 //system("./gss-poke.py");
  81         }
  82
  83         /* draw all the rectangles */
  84         for(i = 0; i < faces->total; i++)
  85         {
  86                 /* extract the rectangles only */
  87                 CvRect face = *(CvRect*)cvGetSeqElem(faces, i);
  88                 CvPoint upperLeft = cvPoint(face.x * scale, face.y * scale);
  89                 CvPoint bottomRight = cvPoint((face.x + face.width) * scale,
  90                                 (face.y + face.height) * scale);
  91                 cvRectangle(image, upperLeft, bottomRight, CV_RGB(255,0,0), 3);
  92         }
  93
  94         if(small_image != image)
  95                 cvReleaseImage(&small_image);
  96         cvReleaseMemStorage(&storage);
  97 }
  98
  99 void screensave(time_t t_current)
 100 {
 101         static int last_elapse = 0;
 102         static int activated = 0;
 103         int elapse = difftime(time(NULL), t_current);
 104         int timeout = 10;
 105         if(elapse > timeout && elapse != last_elapse)
 106         {
 107                 last_elapse = elapse;
 108                 printf("elapse = %d\n", elapse);
 109                 if(!activated)
 110                 {
 111                         printf("activated\n");
 112                         activated = 1;
 113                         system("gnome-screensaver-command -a");
 114                 }
 115         }
 116         if(elapse < timeout && activated)
 117         {
 118                 printf("deactivated\n");
 119                 activated = 0;
 120                 system("gnome-screensaver-command -d");
 121         }
 122 }
 123
 124 // A Simple Camera Capture Framework.
 125 int main(int argc, char** argv)
 126 {
 127         CvHaarClassifierCascade* cascade = load_object_detector(argv[1]);
 128
 129         CvCapture* capture = cvCaptureFromCAM(CV_CAP_ANY);
 130         if(!capture) {
 131                 cerr << "ERROR: capture is NULL " << endl;
 132                 getchar();
 133                 return -1;
 134         }
 135
 136         // Create a window in which the captured images will be presented
 137         cvNamedWindow("mywindow", CV_WINDOW_AUTOSIZE);
 138
 139         IplImage* frame = cvQueryFrame(capture);
 140         if(!frame) {
 141                 cerr << "ERROR: frame is null..." << endl;
 142                 getchar();
 143                 return -1;
 144         }
 145         IplImage* mirrored =
 146                 cvCreateImage(cvGetSize(frame), frame->depth, frame->nChannels);
 147         t_current = time(NULL);
 148         // Show the image captured from the camera in the window and repeat
 149         while(1) {
 150                 // Get one frame
 151                 frame = cvQueryFrame(capture);
 152                 if(!frame) {
 153                         cerr << "ERROR: frame is null..." << endl;
 154                         getchar();
 155                         break;
 156                 }
 157
 158                 //flip the image so displayed right/left corresponds to physical right/left
 159                 cvFlip(frame, mirrored, MIRROR);
 160
 161                 detect_and_draw_objects(mirrored, cascade, 1);
 162                 cvShowImage("mywindow", mirrored);
 163                 // Do not release the frame!
 164                 screensave(t_current);
 165
 166                 //If ESC key pressed, Key=0x10001B under OpenCV 0.9.7(linux version),
 167                 //remove higher bits using AND operator
 168                 if((cvWaitKey(100) & 255) == 27) break;
 169         }
 170
 171         // Release the capture device housekeeping
 172         cvReleaseCapture(&capture);
 173         cvDestroyWindow("mywindow");
 174         cvReleaseImage(&mirrored);
 175         return 0;
 176 }