// need to return positive or negative
void initCaptureFiles( int argc, char *argv[], CvCapture **capture, CvCapture **stereoCapture, int *webcamRun, int *enable3D ) {
if( argc < 3 ) {;
printf("Incorrect arguments:\n");
printf("Webcam: mainTracker mean.xml cov.xml\n");
printf("2D video: mainTracker mean.xml cov.xml video.avi");
printf("3D video: mainTracker mean.xml cov.xml video.avi stereo.avi\n");
exit(1);
}
char locationVideoActual[300];
char locationVideoStereo[300];
if( argc == 3 ) {
printf("Running on webcam\n");
*webcamRun = 1;
} else if( argc == 4 ) {
strncpy( locationVideoActual, argv[3], 300 );
} else if( argc == 5 ) {
strncpy( locationVideoActual, argv[3], 300 );
strncpy( locationVideoStereo, argv[4], 300 );
} else {
printf("Incorrect arguments:\n");
printf("Webcam: mainTracker mean.xml cov.xml\n");
printf("2D video: mainTracker mean.xml cov.xml video.avi");
printf("3D video: mainTracker mean.xml cov.xml video.avi stereo.avi\n");
exit(1);
}
if( *webcamRun ) {
*capture = cvCaptureFromCAM(0);
*stereoCapture = cvCreateFileCapture( "nonexistantfile.avi" );
} else {
*capture = cvCreateFileCapture( locationVideoActual );
*stereoCapture = cvCreateFileCapture( locationVideoStereo );
}
if ( !*capture ) {
fprintf( stderr, "Cannot open regular video file\n" );
exit(1);
} else {
fprintf( stderr, "\nRegular video loaded ok\n" );
}
if ( *stereoCapture ) {
printf("Depth file found, enabling 3D tracking\n");
*enable3D = 1;
} else {
fprintf( stderr, "Could not open depth file, using 2D tracking" );
*enable3D = 0;
}
}
void test() {
CvCapture *capture = cvCreateFileCapture("D:\\²âÊÔÊÓƵ\\1344.avi");
int frameWidth = cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_WIDTH);
int frameHeight = cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_HEIGHT);
codeBook *cb = new codeBook[frameWidth * frameHeight];
memset(cb, 0, frameWidth * frameHeight * sizeof(codeBook));
unsigned int bound[3] = { 10 ,10,10 };
int minMod[3] = { 10 ,10,10 };
int maxMod[3] = { 10 ,10,10 };
IplImage *frame[1000];
for (int i = 0; i < 1000; i++) {
frame[i] = cvCreateImage(cvSize(frameWidth, frameHeight), 8, 3);
cvCopy(cvQueryFrame(capture), frame[i]);
}
for (int i = 0; i < frameWidth * frameHeight; i++) {
for (int j = 0; j < 1000; j++) {
UpdateCodeBook((unsigned char*)frame[j]->imageData + i * 3, cb[i], bound, 3);
}
}
IplImage *mask = cvCreateImage(cvSize(frameWidth, frameHeight), 8, 1);
for (int i = 0; i < 1000; i++) {
for (int j = 0; j < frameWidth * frameHeight; j++) {
mask->imageData[j] = BackgroundDiff((unsigned char*)frame[i]->imageData + j * 3, cb[j], 3, minMod, maxMod);
}
FindConnectedComponents(mask);
cvShowImage("1", mask);
cvShowImage("2", frame[i]);
cvWaitKey(30);
}
}
//Initialize capture from avi
int initVideoCapture(char* video_path)
{
capture = cvCreateFileCapture(video_path);
frames = (int) cvGetCaptureProperty(
capture,
CV_CAP_PROP_FRAME_COUNT
);
// writer = cvCreateVideoWriter(
// "my_video.avi",
// CV_FOURCC('P','I','M','1'),
// 30,
// size,
// isColor
// );
printf("no of frames = %d", frames);
if( !frames )
{
fprintf(stderr, "failed to initialize camera capture\n");
return 0;
}
return 1;
}
//--------------------------------------------------------------------------------------
// Name: CVInit()
// Desc: Initializate OpenCV
//--------------------------------------------------------------------------------------
bool GLCVUtils::CVInit (int mode)
{
if (mode == VIDEO_FILE)
{
capture = cvCreateFileCapture ("Ratatouille.avi");
if (! capture) printf ("\n\n\nerror creating file capture\n\n\n");
}
else if (mode == CAMERA)
{
// create capture
capture = cvCreateCameraCapture (0);
if (! capture)
{
printf ("\nError creating capture");
return false;
}
// sets camera (hardware) resolution
cvSetCaptureProperty (capture, CV_CAP_PROP_FRAME_WIDTH, TEXTURE_W);
cvSetCaptureProperty (capture, CV_CAP_PROP_FRAME_HEIGHT, TEXTURE_H);
}
else
{
printf ("\nWrong Mode");
}
return true;
}
int main(int argc, char* argv[]) {
const char* filename = "./test.avi";
if(argc > 1) {
filename = argv[1];
}
CvCapture* cap = cvCreateFileCapture(filename);
if(cap == NULL) {
printf("open camera failed!\n");
return -1;
}
cvSaveImage("video.jpg", cvQueryFrame(cap));
const char* winName = "Go-OpenCV";
cvNamedWindow(winName, 1);
for(;;) {
IplImage* img = cvQueryFrame(cap);
cvShowImage(winName, img);
if(cvWaitKey(50) == 27) {
break;
}
}
cvDestroyWindow(winName);
cvReleaseCapture(&cap);
return 0;
}
int readVideoWithATrackbar(char *fileName)
{
cvNamedWindow( "win_1", CV_WINDOW_AUTOSIZE );
g_capture = cvCreateFileCapture( fileName );
int frames = (int) cvGetCaptureProperty(
g_capture,
CV_CAP_PROP_FRAME_COUNT
);
if( frames != 0 ) {
cvCreateTrackbar(
"Position",
"win_1",
&g_slider_position,
frames,
onTrackbarSlide
);
}
IplImage* frame;
while (1) {
frame = cvQueryFrame( g_capture );
if ( !frame ) {
break;
}
cvShowImage( "win_1", frame );
char c = cvWaitKey(33);
if ( c == 27 ) {
break;
}
}
return (0);
}
int main(int argc, const char * argv[]) {
CvCapture* capture = cvCreateFileCapture( argv[1] );
if (!capture) return -1;
IplImage* bgr_frame = cvQueryFrame( capture );
double fps = cvGetCaptureProperty( capture , CV_CAP_PROP_FPS );
CvSize size = cvSize(
(int)cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_WIDTH),
(int)cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_HEIGHT)
);
CvVideoWriter* writer = cvCreateVideoWriter( argv[2], CV_FOURCC('M', 'J', 'P', 'G'), fps, size);
IplImage* logpolar_frame = cvCreateImage(size, IPL_DEPTH_8U, 3);
while ( (bgr_frame = cvQueryFrame(capture)) != NULL ) {
cvLogPolar(bgr_frame, logpolar_frame,
cvPoint2D32f(bgr_frame->width/2, bgr_frame->height/2),
40,
CV_INTER_LINEAR+CV_WARP_FILL_OUTLIERS );
cvWriteFrame(writer, logpolar_frame);
}
cvReleaseVideoWriter( &writer );
cvReleaseImage( &logpolar_frame );
cvReleaseCapture( &capture );
return 0;
}
int main(int argc, char * const argv[])
{
/* Initialize the camera */
CvCapture *CamCapture = 0;
CamCapture = cvCreateFileCapture("http://192.168.2.135:81/videostream.asf?user=viki&pwd=viki&resolution=640*480");
if (!CamCapture)
{printf("IP Cam not ready\n");
return -1;}
/* initialize video writer */
CvVideoWriter *IPCamWriter = 0;
CvSize size;
size.width = 640;
size.height = 480;
IPCamWriter = cvCreateVideoWriter("/home/viki/Videos/IPCamOut.avi", CV_FOURCC('D','I','V','X'), 4, size, 1); //needs time index in naming
/* time */
time_t current_time;
current_time = time (NULL);
long int stop_time = current_time + 10;
/* main loop */
while( current_time < stop_time )
{
/* write image to file */
cvWriteFrame(IPCamWriter, cvQueryFrame( CamCapture ));
}
/* Clean up memory */
cvReleaseCapture ( &CamCapture );
cvReleaseVideoWriter(&IPCamWriter);
}
VideoCapture::VideoCapture(std::string _path_to_video,
int32_t _snapshot_delay)
: capture_frame(nullptr), frame(nullptr), path_to_video(_path_to_video), snapshot_delay(_snapshot_delay), window_name("Capture"), btv_sr(nullptr)
{
capture_frame = cvCreateFileCapture(path_to_video.c_str());
btv_sr = new NS_SuperResolution::SuperResolution();
}
int main( int argc, char** argv ) {
if (argc == 1) {
std::cout << "ERROR: missing filename" << std::endl;
return -1;
}
cvNamedWindow( "Video Capture", CV_WINDOW_AUTOSIZE );
//CvCapture* capture = cvCaptureFromAVI( argv[1] ); // either one will work
CvCapture* capture = cvCreateFileCapture( argv[1] );
if (capture == NULL) {
std::cout << "ERROR: can not open file " << argv[1] << std::endl;
return -1;
}
IplImage* frame;
while(1) {
frame = cvQueryFrame( capture );
if( !frame ) break;
cvShowImage( "Video Capture", frame );
char c = cvWaitKey(33);
if( c == 27 ) break;
}
cvReleaseCapture( &capture );
cvDestroyWindow( "Video Capture" );
}
int main( int argc, char** argv ) {
cvNamedWindow( "Example3", CV_WINDOW_AUTOSIZE );
g_capture = cvCreateFileCapture( argv [1] );
int frames = (int) cvGetCaptureProperty(
g_capture,
CV_CAP_PROP_FRAME_COUNT
);
if( frames!= 0 ) {
cvCreateTrackbar(
"Position",
"Example3",
&g_slider_position,
frames,
onTrackbarSlide
);
}
IplImage* frame;
while(1) {
frame = cvQueryFrame( g_capture );
if( !frame ) break;
cvShowImage( "Example3", frame );
char c = cvWaitKey(33);
if( c == 27 ) break;
}
cvReleaseCapture( &g_capture );
cvDestroyWindow( "Example3" );
return(0);
}
int main(int argc, char** argv){
// Example2という名前のウィンドウを作成する
cvNamedWindow("Example2", CV_WINDOW_AUTOSIZE);
// ビデオファイルからフレームを扱えるように準備する
CvCapture *capture = cvCreateFileCapture(argv[1]);
IplImage *frame;
// ビデオファイルをループして表示する
while(1){
// ビデオファイルからフレームを読み出す
frame = cvQueryFrame(capture);
if(!frame){
break;
}
// Example2のウィンドウにフレームを表示する
cvShowImage("Example2", frame);
// 33ミリ秒キー入力を待つ
char c = cvWaitKey(33);
// エスケープキーが押されればループを抜ける
if(c == 27){
break;
}
}
// CvCapture変数を解放する
cvReleaseCapture(&capture);
// ウィンドウを閉じる
cvDestroyWindow("Example2");
return 0;
}
void THISCLASS::OnStart() {
// Open file
wxString filename_string = GetConfigurationString(wxT("File"), wxT(""));
wxFileName filename = mCore->GetProjectFileName(filename_string);
if (! filename.FileExists()) {
wxString msg = wxT("The avi file does not exist: ");
msg << filename_string;
AddError(msg);
return;
}
if (filename.IsOk()) {
mCapture = cvCreateFileCapture(filename.GetFullPath().mb_str(wxConvFile));
}
// Error? Check whether the file exists or not, to give an appropriate error message to the user
if (mCapture == NULL) {
std::fstream f;
f.open(filename.GetFullPath().mb_str(wxConvFile));
if (f.is_open()) {
f.close();
AddError(wxT("Can open the AVI file as a file, but not with OpenCV."));
return;
} else {
AddError(wxT("Cannot open AVI file: permissions problem or something?"));
return;
}
}
// Reset to first frame
cvSetCaptureProperty(mCapture, CV_CAP_PROP_POS_FRAMES, 0);
}
void Kalman_Filter::video_extraction()
{
cvNamedWindow( "video", CV_WINDOW_AUTOSIZE );
CvCapture* capture = cvCreateFileCapture( "fi-br-m1.avi" );
IplImage* frame;
int frameNo = 0;
while(1)
{
frame = cvQueryFrame( capture );
if (frameNo == 0) cvSaveImage("model.png", frame, 0);
if (frameNo == 30) cvSaveImage("data.png", frame, 0);
if( !frame ) break;
cvShowImage( "video", frame );
char c = cvWaitKey(33);
if( c == 27 ) break;
frameNo++;
}
cvReleaseCapture( &capture );
cvDestroyWindow( "video" );
}
int main(int argc, char** argv) {
CvCapture* capture = 0;
IplImage* input = 0;
IplImage* output = 0;
int tick = 0, prev_tick = 0;
double now = 0.0;
CvFont font;
char buffer[256];
const char* windowName = "median";
if (argc == 1 || (argc == 2 && strlen(argv[1]) == 1 && isdigit(argv[1][0]))) {
capture = cvCreateCameraCapture(argc == 2 ? argv[1][0] - '0' : 0);
} else if (argc == 2) {
capture = cvCreateFileCapture(argv[1]);
}
if (!capture) {
fprintf(stderr, "ERROR: capture is NULL \n");
return (-1);
}
cvNamedWindow(windowName, CV_WINDOW_AUTOSIZE);
cvInitFont(&font, CV_FONT_HERSHEY_SIMPLEX, 1.0, 1.0, 0.0, 1, 0);
input = cvQueryFrame(capture);
if (!input) {
fprintf(stderr, "Could not query frame...\n");
return (-1);
}
output = cvCreateImage(cvSize(input->width, input->height), IPL_DEPTH_8U, 3);
while (1) {
input = cvQueryFrame(capture);
if (!input) {
fprintf(stderr, "Could not query frame...\n");
break;
}
process(input, output);
sprintf(buffer, "%3.1lfms", now / 1000);
cvPutText(output, buffer, cvPoint(50, 150), &font, CV_RGB(255, 0, 0));
cvShowImage(windowName, output);
//If a certain key pressed
if (cvWaitKey(10) >= 0) {
break;
}
tick = cvGetTickCount();
now = (tick - prev_tick) / cvGetTickFrequency();
prev_tick = tick;
}
cvReleaseImage(&output);
cvReleaseCapture(&capture);
cvDestroyWindow(windowName);
return 0;
}
void the_project::project_init()
{
car_of_pro = new the_car();
//camera 480*640
for_cam = cvCreateCameraCapture(1);
for_video = cvCreateFileCapture("test.avi");
image_size = cvSize(cvGetCaptureProperty(for_cam,3),cvGetCaptureProperty(for_cam,4));
wr1 = cvCreateVideoWriter("record_ori.avi",CV_FOURCC('X','V','I','D') ,15,image_size);
wr2 = cvCreateVideoWriter("record_cha.avi",CV_FOURCC('X','V','I','D') ,15,image_size);
newpoints[0]=cvPoint2D32f(0,0);
newpoints[1]=cvPoint2D32f(0,image_size.height);
newpoints[2]=cvPoint2D32f(image_size.width,image_size.height);
newpoints[3]=cvPoint2D32f(image_size.width,0);
red_min=200;
rg_max=100;
rb_max=100;
green_min=200;
gb_max=100;
gr_max=100;
}
int main( int argc, char** argv ) {
// CAPTURE VIDEO
CvCapture* capture;
capture = cvCreateFileCapture("trafficDay.avi");
if( capture == NULL ) {
fprintf (stderr, "cannot open file\n");
exit(1);
}
// ALLOCATE SPACE FOR IplImage STRUCTURES.
// DEFAULT ONE FROM VIDEO.
IplImage *big_frame = cvQueryFrame(capture);
IplImage *frame = cvCreateImage (cvSize(DEFAULT_SIZE(0), DEFAULT_SIZE(1)), big_frame->depth, big_frame->nChannels);
IplImage *last_frame = cvCreateImage (cvSize(DEFAULT_SIZE(0), DEFAULT_SIZE(1)), big_frame->depth, big_frame->nChannels);
IplImage *diff = cvCreateImage (cvSize(DEFAULT_SIZE(0), DEFAULT_SIZE(1)), big_frame->depth, big_frame->nChannels);
cvResize (big_frame, last_frame, CV_INTER_LINEAR );
// CREATE WINDOWS AND LOCATE THEM TO TOP LEFT OF THE SCREEN
cvNamedWindow( "Video", CV_WINDOW_AUTOSIZE);
cvNamedWindow( "Difference", CV_WINDOW_AUTOSIZE);
cvMoveWindow ("Video", 100, 0);
cvMoveWindow ("Difference", 100, 500);
// MAIN LOOP
while((big_frame = cvQueryFrame (capture)) != NULL) {
// RESIZE IMAGE FROM VIDEO
cvResize (big_frame, frame, CV_INTER_LINEAR );
// SHOW CAPTURED AND RESIZED IMAGE
cvShowImage("Video", frame);
// COMPUTE AND SWOW DIFFERENCE
cvSub (frame, last_frame, diff, NULL);
cvShowImage("Difference", diff);
// WAIT FOR BREAK AND TO ADJUST FPS
char c = cvWaitKey(50);
if(c == 27) break;
// UPDATE LAST FRAME
cvCopy (frame, last_frame, NULL);
}
//RELEASE IMAGE STRUCTURES
cvReleaseImage (&last_frame);
cvReleaseImage (&frame);
cvReleaseImage (&diff);
// RELEASE CAPTURE
cvReleaseCapture(&capture);
// DESTROY WINDOWS
cvDestroyWindow("Video");
cvDestroyWindow("Difference");
return 0;
}
//----------------------------------------------------------------------------------------------------
BOOL CMyVideoOpenCV::CaptureVideoFile(CString szFileName)
{
SetVideoType(VIDEO_FILE);
SetFileName(szFileName);
m_pCapture = cvCreateFileCapture(szFileName);
if(!m_pCapture) return FALSE;
return TRUE;
}
bool VideoCapture::open(const String& filename)
{
if (isOpened()) release();
icap = IVideoCapture_create(filename);
if (!icap.empty())
return true;
cap.reset(cvCreateFileCapture(filename.c_str()));
return isOpened();
}
void FaceDetect::detectVideo(const char* videoFile) {
CvCapture* capture = cvCreateFileCapture(videoFile);
cv::Mat frame;
while(true) {
frame = cvQueryFrame(capture);
if(frame.empty())
break;
detect(frame);
}
}
CvCapture* ipGetCapture(char* Filename)
{
CvCapture* capture = cvCreateFileCapture(Filename);
if( !capture )
{
fprintf( stderr, "ERROR: capture is NULL \n" );
//return -1;
}
return capture;
}
mvCamera:: mvCamera (const char* video_file) :
bin_resize ("mvCamera - resize"),
bin_getFrame ("mvCamera - getFrame")
{
unsigned width, height;
read_common_mv_setting ("IMG_WIDTH_COMMON", width);
read_common_mv_setting ("IMG_HEIGHT_COMMON", height);
_capture = cvCreateFileCapture (video_file);
_imgResized = mvGetScratchImage_Color();
}
Camera::Camera(const char* filename,
const char* homographyFile,
const char* inverseFile)
{
if((capture = cvCreateFileCapture(filename)) == NULL)
{
printf("Error creating file capture for file %s\n", filename);
}
loadHomography(homographyFile, inverseFile);
getCameraProperties();
}
//------------------------------------------------------------------------------
void OgreVideoTexture::_initCapture()
{
mCvCapture = cvCreateFileCapture(mVideoFileName.c_str());
mFrameCount = cvGetCaptureProperty(mCvCapture, CV_CAP_PROP_FRAME_COUNT);
// skip first frame
cvGrabFrame(mCvCapture);
mCurrentFrameIndex++;
_logMessage("openned " + mVideoFileName);
}
/** Permet de choisir le fichier à lire, et déclenche la lecture */
void Ui_MainWindow::select_file(){
QString filename = QFileDialog::getOpenFileName(this,tr("OpenImage"), "/home");
if (filename != NULL) {
killTimer(timer_id);
QByteArray filename_array = filename.toLatin1();
const char* filename_string = filename_array.data();
source = cvCreateFileCapture(filename_string);
assert(source);
timer_id = startTimer(1);
}
return;
}
int main( int argc, char** argv )
{
int frameNum = 0;
printf("Debug 00\n");
char* video = argv[1];
printf("Debug 11 %s \n",argv[1]);
capture = cvCreateFileCapture(video);
if( !capture ) {
printf( "Could not initialize capturing..\n" );
return -1;
}
if( show == 1 )
cvNamedWindow( "Video", 0 );
while( true ) {
IplImage* frame = 0;
int i, j, c;
// get a new frame
frame = cvQueryFrame( capture );
if( !frame ) {
printf("debug 0");
break;
}
if( !image ) {
printf("debug 1");
image = cvCreateImage( cvSize(frame->width,frame->height), 8, 3 );
image->origin = frame->origin;
}
cvCopy( frame, image, 0 );
if( show == 1 ) {
printf("debug 2");
cvShowImage( "Video", image);
c = cvWaitKey(3);
if((char)c == 27) break;
}
std::cerr << "The " << frameNum << "-th frame" << std::endl;
frameNum++;
}
if( show == 1 )
cvDestroyWindow("Video");
return 0;
}
int main( int argc, char** argv){
IplImage *frame;
int key;
/* supply the AVI file to play */
assert( argc == 2 );
/* load the AVI file */
CvCapture *capture = cvCreateFileCapture(argv[1]) ; //cvCaptureFromAVI( argv[1] );
/* always check */
if( !capture ) {
printf("ERROR: capture == NULL \n");
return 1;
}
/* get fps, needed to set the delay */
int fps = ( int )cvGetCaptureProperty( capture, CV_CAP_PROP_FPS );
int frameH = (int) cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_HEIGHT);
int frameW = (int) cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_WIDTH);
/* display video */
cvNamedWindow( "video", CV_WINDOW_AUTOSIZE );
while( key != 'q' ) {
double t1=(double)cvGetTickCount();
/* get a frame */
frame = cvQueryFrame( capture );
double t2=(double)cvGetTickCount();
printf("time: %gms fps: %.2g\n",(t2-t1)/(cvGetTickFrequency()*1000.), 1000./((t2-t1)/(cvGetTickFrequency()*1000.)));
/* always check */
if( !frame ) break;
/* display frame */
cvShowImage( "video", frame );
/* quit if user press 'q' */
key = cvWaitKey( 1000 / fps );
}
/* free memory */
cvReleaseCapture( &capture );
cvDestroyWindow( "video" );
return 0;
}
static int l_initCam(lua_State *L) {
// args
int width = lua_tonumber(L, 2);
int height = lua_tonumber(L, 3);
// max allocs ?
if (fidx == MAXIDX) {
perror("max nb of devices reached...\n");
}
// if number, open a camera device
if (lua_isnumber(L, 1)) {
printf("initializing camera\n");
const int idx = lua_tonumber(L, 1);
capture[fidx] = cvCaptureFromCAM(idx);
if( capture[fidx] == NULL ) {
perror("could not create OpenCV capture");
}
// sleep(2);
//cvSetCaptureProperty(capture[fidx], CV_CAP_PROP_FRAME_WIDTH, width);
//cvSetCaptureProperty(capture[fidx], CV_CAP_PROP_FRAME_HEIGHT, height);
frame[fidx] = cvQueryFrame ( capture[fidx] );
int tries = 10;
while ((!frame[fidx] || frame[fidx]->height != height || frame[fidx]->width != width) && tries>0) {
frame[fidx] = cvQueryFrame ( capture[fidx] );
tries--;
sleep(1);
}
if ( frame[fidx] == NULL ) {
perror("failed OpenCV test capture");
}
if(frame[fidx]->depth != IPL_DEPTH_8U) {
perror("initCam: opencv supported for 8-bit unsigned capture only");
}
printf("camera initialized\n");
} else {
// open a file;
const char *file = lua_tostring(L, 1);
printf("initializing frame grabber on file: %s\n", file);
capture[fidx] = cvCreateFileCapture(file);
if( capture[fidx] == NULL ) {
perror("could not create OpenCV capture");
}
}
// next
lua_pushnumber(L, fidx);
fidx ++;
return 0;
}
int main( int argc, char* argv[] ) {
CvCapture* capture = NULL;
if (argc >= 2) {
capture = cvCreateFileCapture( argv[1] );
} else {
capture = cvCreateCameraCapture( 0 );
}
cvNamedWindow( "Original", CV_WINDOW_AUTOSIZE );
cvNamedWindow( "Grayscale", CV_WINDOW_AUTOSIZE );
cvNamedWindow( "Canny edge detection", CV_WINDOW_AUTOSIZE );
IplImage* frame = NULL;
IplImage* frame_gray = NULL;
IplImage* frame_edges = NULL;
while (1) {
frame = cvQueryFrame(capture);
if (!frame) break;
cvShowImage( "Original", frame );
// Turn to grayscale;
frame_gray = cvCreateImage( cvGetSize(frame), frame->depth, 1 );
cvCvtColor(frame, frame_gray, CV_RGB2GRAY);
cvSmooth( frame_gray, frame_gray, CV_GAUSSIAN, 5); // TODO: is this really necessary???
cvShowImage( "Grayscale", frame_gray );
// Perform Canny edge detection;
frame_edges = cvCreateImage( cvGetSize(frame), frame->depth, 1 );
cvCanny( frame_gray, frame_edges, 10, 100, 3 );
cvShowImage( "Canny edge detection", frame_edges );
char c = cvWaitKey(33);
if ( c == 27 ) break;
}
cvReleaseImage( &frame );
cvReleaseImage( &frame_gray );
cvReleaseImage( &frame_edges );
cvReleaseCapture( &capture );
cvDestroyWindow( "Original" );
cvDestroyWindow( "Grayscale" );
cvDestroyWindow( "Canny edge detection" );
return 0;
}
int main( int argc, char** argv ) {
// create a window with appropriate size. Windows name is determined by file name
// supplied as an argument
cvNamedWindow( argv[1], CV_WINDOW_AUTOSIZE );
// open video
g_capture = cvCreateFileCapture( argv[1] );
// set read position in units of frames and retrieve total number of frames
int frames = (int) cvGetCaptureProperty(
g_capture,
CV_CAP_PROP_FRAME_COUNT
);
// do not create treackbar if video does not include an information
// about number of frames
if( frames!=0 ) {
cvCreateTrackbar(
"Position",
argv[1],
&g_slider_position,
frames,
onTrackbarSlide
);
}
// display video frame by frame
IplImage* frame;
while(1) {
frame = cvQueryFrame( g_capture );
if( !frame ) break;
cvShowImage( argv[1], frame );
// set trackbar to a current frame position
cvSetTrackbarPos("Position", argv[1], g_slider_position);
g_slider_position++;
char c = cvWaitKey(33);
// quit if ESC is pressed
if( c == 27 ) break;
}
// free memory
cvReleaseCapture( &g_capture );
cvDestroyWindow( argv[1] );
return(0);
}