From b7e484d5baf2f9173ce53595b4e06eabeb30e036 Mon Sep 17 00:00:00 2001
From: ozzloy <ozzloy@gmail.com>
Date: Sat, 7 Feb 2009 21:45:34 -0800
Subject: [PATCH] Initial commit

---
 Makefile        |  3 ++
 hello-world.cpp | 86 +++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 89 insertions(+)
 create mode 100644 Makefile
 create mode 100644 hello-world.cpp

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..3e0fc3a
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,3 @@
+
+all:
+	gcc `pkg-config --cflags opencv` -o hello-world hello-world.cpp `pkg-config --libs opencv`
diff --git a/hello-world.cpp b/hello-world.cpp
new file mode 100644
index 0000000..e9bb476
--- /dev/null
+++ b/hello-world.cpp
@@ -0,0 +1,86 @@
+#include <cv.h>
+#include <highgui.h>
+#include <stdio.h>
+
+CvHaarClassifierCascade* load_object_detector( const char* cascade_path )
+{
+	return (CvHaarClassifierCascade*)cvLoad( cascade_path );
+}
+
+void detect_and_draw_objects( IplImage* image,
+		CvHaarClassifierCascade* cascade,
+		int do_pyramids )
+{
+	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 );
+
+	/* draw all the rectangles */
+	for( i = 0; i < faces->total; i++ )
+	{
+		/* extract the rectangles only */
+		//CvRect face_rect = *(CvRect*)cvGetSeqElem( faces, i, 0 );
+		CvRect face_rect = *(CvRect*)cvGetSeqElem( faces, i);
+		cvRectangle( image, cvPoint(face_rect.x*scale,face_rect.y*scale),
+				cvPoint((face_rect.x+face_rect.width)*scale,
+					(face_rect.y+face_rect.height)*scale),
+				CV_RGB(255,0,0), 3 );
+	}
+
+	if( small_image != image )
+		cvReleaseImage( &small_image );
+	cvReleaseMemStorage( &storage );
+}
+
+// A Simple Camera Capture Framework
+int main( int argc, char** argv )
+{
+	CvHaarClassifierCascade* cascade = load_object_detector(argv[1]);
+
+	CvCapture* capture = cvCaptureFromCAM( CV_CAP_ANY );
+	if( !capture ) {
+		fprintf( stderr, "ERROR: capture is NULL \n" );
+		getchar();
+		return -1;
+	}
+
+	// Create a window in which the captured images will be presented
+	cvNamedWindow( "mywindow", CV_WINDOW_AUTOSIZE );
+
+	// Show the image captured from the camera in the window and repeat
+	while( 1 ) {
+		// Get one frame
+		IplImage* frame = cvQueryFrame( capture );
+		if( !frame ) {
+			fprintf( stderr, "ERROR: frame is null...\n" );
+			getchar();
+			break;
+		}
+
+		detect_and_draw_objects( frame, cascade, 1 );
+		cvShowImage( "mywindow", frame );
+		// Do not release the frame!
+
+		//If ESC key pressed, Key=0x10001B under OpenCV 0.9.7(linux version),
+		//remove higher bits using AND operator
+		if( (cvWaitKey(10) & 255) == 27 ) break;
+	}
+
+	// Release the capture device housekeeping
+	cvReleaseCapture( &capture );
+	cvDestroyWindow( "mywindow" );
+	return 0;
+}
-- 
2.30.2