//use the camera to aid the decision to sleep.
//Copyright 2009 Daniel Watson
/*
- use a camera to prevent screensaver
- Copyright (C) 2009 daniel watson, ozzloy@gmail.com
+ This file is part of oble.
- This program is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
+ oble is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
+ oble is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-/*
- This file is part of oble.
-
- oble is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- oble is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with oble. If not, see <http://www.gnu.org/licenses/>.
+ You should have received a copy of the GNU General Public License
+ along with oble. If not, see <http://www.gnu.org/licenses/>.
*/
#include <cv.h>
CvHaarClassifierCascade* load_object_detector(const char* cascade_path)
{
- return (CvHaarClassifierCascade*)cvLoad(cascade_path);
+ return (CvHaarClassifierCascade*)cvLoad(cascade_path);
}
void detect_and_draw_objects(IplImage* image,
- CvHaarClassifierCascade* cascade,
- int do_pyramids)
+ CvHaarClassifierCascade* cascade,
+ int do_pyramids)
{
- IplImage* small_image = image;
- CvMemStorage* storage = cvCreateMemStorage(0);
- CvSeq* faces;
- int i, scale = 1;
- static int saw_last_time = 0;
-
- /* if the flag is specified, down-scale the input image to get a
- performance boost w/o loosing quality (perhaps) */
- if(do_pyramids)
- {
- small_image = cvCreateImage(cvSize(image->width/2,image->height/2),
- IPL_DEPTH_8U, 3);
- cvPyrDown(image, small_image, CV_GAUSSIAN_5x5);
- scale = 2;
- }
+ IplImage* small_image = image;
+ CvMemStorage* storage = cvCreateMemStorage(0);
+ CvSeq* faces;
+ int i, scale = 1;
+
+ /* if the flag is specified, down-scale the input image to get a
+ performance boost w/o loosing quality (perhaps) */
+ if(do_pyramids)
+ {
+ small_image = cvCreateImage(cvSize(image->width/2,
+ image->height/2),
+ IPL_DEPTH_8U, 3);
+ cvPyrDown(image, small_image, CV_GAUSSIAN_5x5);
+ scale = 2;
+ }
+
+ /* use the fastest variant */
+ faces = cvHaarDetectObjects(small_image, cascade, storage, 1.2, 2,
+ CV_HAAR_DO_CANNY_PRUNING);
- /* use the fastest variant */
- faces = cvHaarDetectObjects(small_image, cascade, storage, 1.2, 2,
- CV_HAAR_DO_CANNY_PRUNING);
+ update_idle(faces->total);
- if(0 < faces->total)
+ /* draw all the rectangles */
+ for(i = 0; i < faces->total; i++)
+ {
+ /* extract the rectangles only */
+ CvRect face = *(CvRect*)cvGetSeqElem(faces, i);
+ CvPoint upperLeft = cvPoint(face.x * scale, face.y * scale);
+ CvPoint bottomRight = cvPoint((face.x + face.width) * scale,
+ (face.y + face.height) * scale);
+ cvRectangle(image, upperLeft, bottomRight, CV_RGB(255,0,0), 3);
+ }
+
+ if(small_image != image)
+ cvReleaseImage(&small_image);
+ cvReleaseMemStorage(&storage);
+}
+
+void update_idle(int faces_total)
+{
+ static int saw_last_time = 0;
+
+ if(0 < faces_total)
+ {
+ t_current = time(NULL);
+ if(verbose)
{
- t_current = time(NULL);
- if(verbose)
- {
- printf(":) face \n");
- }
- if(saw_last_time)
- {
- if(verbose)printf("\t\tpoking\n");
- reset_idle_time();
- system("gnome-screensaver-command --poke");
- }
- saw_last_time = 1;
+ printf(":) face \n");
}
- else
+ if(saw_last_time)
{
- saw_last_time = 0;
- if(verbose)
- {
- printf(":( no face \n");
- }
+ if(verbose)printf("\t\tpoking\n");
+ reset_idle_time();
}
-
- /* draw all the rectangles */
- for(i = 0; i < faces->total; i++)
+ saw_last_time = 1;
+ }
+ else
+ {
+ saw_last_time = 0;
+ if(verbose)
{
- /* extract the rectangles only */
- CvRect face = *(CvRect*)cvGetSeqElem(faces, i);
- CvPoint upperLeft = cvPoint(face.x * scale, face.y * scale);
- CvPoint bottomRight = cvPoint((face.x + face.width) * scale,
- (face.y + face.height) * scale);
- cvRectangle(image, upperLeft, bottomRight, CV_RGB(255,0,0), 3);
+ printf(":( no face \n");
}
+ }
- if(small_image != image)
- cvReleaseImage(&small_image);
- cvReleaseMemStorage(&storage);
}
void screensave(time_t t_current)
{
- static int last_elapse = 0;
- static int activated = 0;
- int elapse = difftime(time(NULL), t_current);
- int timeout = 10;
- if(elapse > timeout && elapse != last_elapse)
+ static int last_elapse = 0;
+ static int activated = 0;
+ int elapse = difftime(time(NULL), t_current);
+ int timeout = 10;
+ if(elapse > timeout && elapse != last_elapse)
+ {
+ last_elapse = elapse;
+ if(verbose)
{
- last_elapse = elapse;
- if(verbose)
- {
- printf("elapse = %d\n", elapse);
- }
- if(!activated)
- {
- printf("activated\n");
- activated = 1;
- system("gnome-screensaver-command -a");
- }
+ printf("elapse = %d\n", elapse);
}
- if(elapse < timeout && activated)
+ if(!activated)
{
- printf("deactivated\n");
- activated = 0;
- system("gnome-screensaver-command -d");
+ printf("activated\n");
+ activated = 1;
+ system("gnome-screensaver-command -a");
}
+ }
+ if(elapse < timeout && activated)
+ {
+ printf("deactivated\n");
+ activated = 0;
+ system("gnome-screensaver-command -d");
+ }
}
int parse_opts(int argc, char **argv)
{
- int index, c;
- opterr = 0;
- const char *options = "vc:";
- while((c = getopt(argc, argv, options)) != -1)
+ int index, c;
+ opterr = 0;
+ const char *options = "vc:\x0";
+ while((c = getopt(argc, argv, options)) != -1)
+ {
+ switch(c)
{
- switch(c)
- {
- case 'v': verbose = 1; break;
- case 'c': cascade_filename = string(optarg); break;
- case '?':
- if(optopt == 'c')
- {
- printf("option -%c requires an argument.\n", optopt);
- }
- else if(isprint (optopt))
- {
- printf("unknown option `-%c'.\n", optopt);
- }
- else
- {
- printf("unknown option char `\\x%x'.\n", optopt);
- }
- break;
- default: abort();
- }
+ case 'v': verbose = 1; break;
+ case 'c': cascade_filename = string(optarg); break;
+ case '?':
+ if(optopt == 'c')
+ {
+ printf("option -%c requires an argument.\n", optopt);
+ }
+ else if(isprint (optopt))
+ {
+ printf("unknown option `-%c'.\n", optopt);
+ }
+ else
+ {
+ printf("unknown option char `\\x%x'.\n", optopt);
+ }
+ break;
+ case '\x0': break; //ignore. not sure why this shows up. maybe zsh?
+ default: abort();
}
+ }
- for(index = optind; index < argc; index++)
- printf("Non-option arg %s\n", argv[index]);
+ for(index = optind; index < argc; index++)
+ printf("Non-option arg %s\n", argv[index]);
- if(cascade_filename == "")
- {
- printf("you must supply a filename with -c option. example:\n");
- printf(
- "%s -c %s\n",
- argv[0],
- "/usr/share/opencv/haarcascades/haarcascade_frontalface_alt.xml"
- );
- return 1;
- }
- if(verbose) printf("SILENT ALARM ACTIVATED!!!\n");
- return 0;
+ if(cascade_filename == "")
+ {
+ printf("you must supply a filename with -c option. example:\n");
+ printf(
+ "%s -c %s\n",
+ argv[0],
+ "/usr/share/opencv/haarcascades/haarcascade_frontalface_alt.xml"
+ );
+ return 1;
+ }
+ if(verbose) printf("SILENT ALARM ACTIVATED!!!\n");
+ return 0;
}
-// A Simple Camera Capture Framework.
-int main(int argc, char** argv)
+int get_frames(CvCapture* capture, CvHaarClassifierCascade* cascade)
{
- if(parse_opts(argc, argv)) return 0;
+ int got_null_frame = 0;
+ IplImage* frame = NULL;
+ get_one_frame(capture, frame);
- CvHaarClassifierCascade* cascade =
- load_object_detector(cascade_filename.c_str());
+ IplImage* mirrored =
+ cvCreateImage(cvGetSize(frame), frame->depth, frame->nChannels);
+ // Show the image captured from the camera in the window and repeat
+ while(!(got_null_frame = get_one_frame(capture, frame)))
+ {
+ //so displayed right/left corresponds to physical right/left:
+ cvFlip(frame, mirrored, MIRROR);
- CvCapture* capture = cvCaptureFromCAM(CV_CAP_ANY);
- if(!capture) {
- cerr << "ERROR: capture is NULL " << endl;
- getchar();
- return -1;
- }
+ detect_and_draw_objects(mirrored, cascade, 1);
+ cvShowImage("mywindow", mirrored);
+ // Do not release the frame!
+ //screensave(t_current);
- // Create a window in which the captured images will be presented
- cvNamedWindow("mywindow", CV_WINDOW_AUTOSIZE);
+ //If ESC key pressed, Key=0x10001B under OpenCV 0.9.7(linux version),
+ //remove higher bits using AND operator
+ if((cvWaitKey(100) & 255) == 27) break;
+ }
+ cvReleaseImage(&mirrored);
+ return got_null_frame;
+}
- IplImage* frame = cvQueryFrame(capture);
- if(!frame) {
- cerr << "ERROR: frame is null..." << endl;
- getchar();
- return -1;
- }
- IplImage* mirrored =
- cvCreateImage(cvGetSize(frame), frame->depth, frame->nChannels);
- t_current = time(NULL);
- // Show the image captured from the camera in the window and repeat
- while(1) {
- // Get one frame
- frame = cvQueryFrame(capture);
- if(!frame) {
- cerr << "ERROR: frame is null..." << endl;
- getchar();
- break;
- }
-
- //flip the image so displayed right/left corresponds to physical right/left
- cvFlip(frame, mirrored, MIRROR);
-
- detect_and_draw_objects(mirrored, cascade, 1);
- cvShowImage("mywindow", mirrored);
- // Do not release the frame!
- //screensave(t_current);
-
- //If ESC key pressed, Key=0x10001B under OpenCV 0.9.7(linux version),
- //remove higher bits using AND operator
- if((cvWaitKey(100) & 255) == 27) break;
- }
+int do_capture()
+{
+ int got_null_capture = 0;
+ CvHaarClassifierCascade* cascade =
+ load_object_detector(cascade_filename.c_str());
+
+ CvCapture* capture = cvCaptureFromCAM(CV_CAP_ANY);
+ if(!capture) {
+ cerr << "ERROR: capture is NULL " << endl;
+ return 1;
+ }
+
+ // Create a window in which the captured images will be presented
+ cvNamedWindow("mywindow", CV_WINDOW_AUTOSIZE);
+ t_current = time(NULL);
+ while(get_frames(capture, cascade))
+ {
+ cerr << "resetting capture." << endl;
+ cvReleaseCapture( &capture );
+ capture = cvCaptureFromCAM( CV_CAP_ANY );
+ if(!capture)
+ {
+ got_null_capture = 1;
+ break;
+ }
+ }
+
+ // Release the capture device housekeeping
+ if(!got_null_capture)
+ {
+ cvReleaseCapture(&capture);
+ }
+ cvDestroyWindow("mywindow");
+ return got_null_capture;
+}
+
+int get_one_frame(CvCapture* capture, IplImage* &frame)
+{
+ int got_null_frame = 0;
+ frame = cvQueryFrame(capture);
+ if(!frame)
+ {
+ cerr << "ERROR: frame is null..., trying again" << endl;
+ frame = cvQueryFrame(capture);
+ if(!frame)
+ {
+ cerr << "ERROR: frame is still null... maybe reset capture?" << endl;
+ got_null_frame = 1;
+ }
+ }
+ return got_null_frame;
+}
+
+// A Simple Camera Capture Framework.
+int main(int argc, char** argv)
+{
+ if(parse_opts(argc, argv)) return 0;
- // Release the capture device housekeeping
- cvReleaseCapture(&capture);
- cvDestroyWindow("mywindow");
- cvReleaseImage(&mirrored);
- return 0;
+ return do_capture();
}
projects / ozzloy@gmail.com / oble / blobdiff