add a contour detector that sends all detected contours

svn path=/trunk/externals/pix_opencv/; revision=16265

3 files changed, 705 insertions, 0 deletions

diff --git a/pix_opencv_contours-help.pd b/pix_opencv_contours-help.pd
new file mode 100644
index 0000000..895cb9c
--- /dev/null
+++ b/pix_opencv_contours-help.pd
@@ -0,0 +1,453 @@
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+#X text 11 60 Description: finds contours;
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diff --git a/pix_opencv_contours.cpp b/pix_opencv_contours.cpp
new file mode 100644
index 0000000..0632c57
--- /dev/null
+++ b/pix_opencv_contours.cpp
@@ -0,0 +1,178 @@
+////////////////////////////////////////////////////////
+//
+// GEM - Graphics Environment for Multimedia
+//
+// zmoelnig@iem.kug.ac.at
+//
+// Implementation file
+//
+//    Copyright (c) 1997-2000 Mark Danks.
+//    Copyright (c) Günther Geiger.
+//    Copyright (c) 2001-2002 IOhannes m zmoelnig. forum::für::umläute. IEM
+//    Copyright (c) 2002 James Tittle & Chris Clepper
+//    For information on usage and redistribution, and for a DISCLAIMER OF ALL
+//    WARRANTIES, see the file, "GEM.LICENSE.TERMS" in this distribution.
+//
+/////////////////////////////////////////////////////////
+// based on code written by Lluis Gomez i Bigorda ( lluisgomez _at_ hangar _dot_ org ) (pix_opencv)
+// Template for pix_opencv class
+
+#include "pix_opencv_contours.h"
+#include <stdio.h>
+#include <RTE/MessageCallbacks.h>
+
+
+CPPEXTERN_NEW(pix_opencv_contours)
+
+/////////////////////////////////////////////////////////
+//
+// pix_opencv_contours
+//
+/////////////////////////////////////////////////////////
+// Constructor
+//
+/////////////////////////////////////////////////////////
+pix_opencv_contours :: pix_opencv_contours() : m_area_threshold(30)
+{ 
+	m_dataout_middle = outlet_new(this->x_obj, 0);
+	m_dataout_right = outlet_new(this->x_obj, 0);
+
+	//~ post("build on %s at %s", __DATE__, __TIME__);
+}
+
+/////////////////////////////////////////////////////////
+// Destructor
+//
+/////////////////////////////////////////////////////////
+pix_opencv_contours :: ~pix_opencv_contours()
+{ 
+}
+
+/////////////////////////////////////////////////////////
+// processImage
+//
+/////////////////////////////////////////////////////////
+void pix_opencv_contours :: processRGBAImage(imageStruct &image)
+{ 
+	error( "pix_opencv_contours : rgba format not supported" );
+}
+
+void pix_opencv_contours :: processRGBImage(imageStruct &image) {
+	error( "pix_opencv_contours : rgb format not supported");
+}
+
+void pix_opencv_contours :: processYUVImage(imageStruct &image) {
+	error( "pix_opencv_contours : yuv format not supported" );
+}
+    	
+void pix_opencv_contours :: processGrayImage(imageStruct &image)
+{ 
+	if ( image.xsize < 0 || image.ysize < 0 ) return;
+
+	cv::Mat imgMat2( image.ysize, image.xsize, CV_8UC1, image.data, image.csize*image.xsize); // just transform imageStruct to IplImage without copying data
+	
+	cv::Mat imgMat = imgMat2.clone();
+		
+	std::vector<std::vector<cv::Point> > contours;
+	std::vector<cv::Point> one_contour;		
+
+	contours.clear();
+	m_contours.clear();
+
+	cv::findContours(imgMat, contours, CV_RETR_LIST, CV_CHAIN_APPROX_SIMPLE);
+		
+	for( size_t i = 0; i < contours.size(); i++ ) {
+		if ( cv::contourArea(contours[i], false) > m_area_threshold ){
+			one_contour.clear();
+			cv::approxPolyDP(contours[i], one_contour, m_epsilon, true);
+			m_contours.push_back(one_contour);
+		}
+	}
+	//~ cv::drawContours(imgMat2, m_contours, -1, cv::Scalar(128,255,255), 3);
+
+	t_atom*info;
+	info = new t_atom[(int) m_contours.size()*14+2];
+	// info : 14x(contour_nb) matrix
+	// info for each contour : area, rotrect corner (8 float), rotrect center, rotrect size, rotation angle
+	int count(0);
+	SETFLOAT(info+1, 14.);
+	int info_offset(2);
+	
+	for( std::vector<std::vector<cv::Point> >::iterator it = m_contours.begin(); it != m_contours.end(); ++it ) {
+		if (!it->empty() && it->size() > 2) {
+			SETFLOAT(info+info_offset, (float) cv::contourArea(*it));
+			
+			cv::RotatedRect rot_rect = cv::minAreaRect(*it);
+			cv::Point2f corners[4];
+			rot_rect.points(corners);
+			for (int j=0;j<4;j++) {
+				SETFLOAT(info+info_offset+j*2+1, corners[j].x/image.xsize);
+				SETFLOAT(info+info_offset+j*2+2, corners[j].y/image.ysize);
+			}
+
+			SETFLOAT(info+info_offset+9, rot_rect.center.x/image.xsize);
+			SETFLOAT(info+info_offset+10, rot_rect.center.y/image.ysize);
+			SETFLOAT(info+info_offset+11, rot_rect.size.width/image.xsize);
+			SETFLOAT(info+info_offset+12, rot_rect.size.height/image.xsize);
+			SETFLOAT(info+info_offset+13, rot_rect.angle);
+			
+			info_offset+=14;
+			count++;
+		}
+	}
+	SETFLOAT(info, (float) count);
+	if (count) outlet_anything(m_dataout_right, gensym("info"), count*14+2, info);
+	else outlet_list(m_dataout_right, gensym("info"), 1, 0);
+	
+	for( std::vector<std::vector<cv::Point> >::iterator it = m_contours.begin(); it != m_contours.end(); ++it ) {
+		if (!it->empty() && it->size() > 2) {
+			int size = 2+it->size()*2;
+			t_atom*ap = new t_atom[size];
+			SETFLOAT(ap, static_cast<t_float>(it->size()));
+			SETFLOAT(ap+1, 2.0);
+			
+			int offset(2);
+			
+			for ( std::vector<cv::Point>::iterator ite=it->begin(); ite!=it->end(); ++ite){
+				SETFLOAT(ap+offset,(float) (*ite).x/image.xsize);
+				SETFLOAT(ap+offset+1,(float) (*ite).y/image.ysize);
+				offset+=2;
+			}
+			outlet_anything(m_dataout_middle, gensym("contour"), size, ap);
+			if(ap)delete[]ap;ap=NULL;	
+			
+		}
+	}
+	
+	if (info) delete info;
+	info = NULL;
+}
+
+/////////////////////////////////////////////////////////
+// static member function
+//
+/////////////////////////////////////////////////////////
+void pix_opencv_contours :: obj_setupCallback(t_class *classPtr)
+{
+	CPPEXTERN_MSG1(classPtr, "epsilon",	epsilonMess, 		double);		    		  	  
+	CPPEXTERN_MSG1(classPtr, "area",	areaMess, 			double);		    		  	  
+}
+
+/////////////////////////////////////////////////////////
+// messages handling
+//
+/////////////////////////////////////////////////////////
+void pix_opencv_contours :: epsilonMess(double arg)
+{
+	m_epsilon = arg > 0 ? arg : 3.;
+	t_atom data_out;
+	SETFLOAT(&data_out, (float) m_epsilon);
+	outlet_anything( m_dataout_right, gensym("epsilon"), 1, &data_out);
+}
+void pix_opencv_contours :: areaMess(double arg)
+{
+	m_area_threshold = arg > 0 ? arg : 30.;
+	t_atom data_out;
+	SETFLOAT(&data_out, (float) m_area_threshold);
+	outlet_anything( m_dataout_right, gensym("area"), 1, &data_out);
+}
diff --git a/pix_opencv_contours.h b/pix_opencv_contours.h
new file mode 100644
index 0000000..5882b5a
--- /dev/null
+++ b/pix_opencv_contours.h
@@ -0,0 +1,74 @@
+/*-----------------------------------------------------------------
+LOG
+    GEM - Graphics Environment for Multimedia
+
+    Threshold filter
+
+    Copyright (c) 1997-1999 Mark Danks. mark@danks.org
+    Copyright (c) Günther Geiger. geiger@epy.co.at
+    Copyright (c) 2001-2002 IOhannes m zmoelnig. forum::für::umläute. IEM. zmoelnig@iem.kug.ac.at
+    Copyright (c) 2002 James Tittle & Chris Clepper
+    For information on usage and redistribution, and for a DISCLAIMER OF ALL
+    WARRANTIES, see the file, "GEM.LICENSE.TERMS" in this distribution.
+
+-----------------------------------------------------------------*/
+
+#ifndef INCLUDE_PIX_OPENCV_CONTOURS_H_
+#define INCLUDE_PIX_OPENCV_CONTOURS_H_
+
+#ifndef _EiC
+#include "cv.h"
+#endif
+
+#include "Base/GemPixObj.h"
+
+/*-----------------------------------------------------------------
+-------------------------------------------------------------------
+CLASS
+    pix_opencv_contours
+    
+	detects contours and send them out
+	
+KEYWORDS
+    pix
+    
+DESCRIPTION
+   
+-----------------------------------------------------------------*/
+class GEM_EXTERN pix_opencv_contours : public GemPixObj
+{
+    CPPEXTERN_HEADER(pix_opencv_contours, GemPixObj)
+
+    public:
+
+	    //////////
+	    // Constructor
+    	pix_opencv_contours();
+    	
+    protected:
+    	
+   	//////////
+   	// Destructor
+   	virtual ~pix_opencv_contours();
+
+   	//////////
+   	// Do the processing
+   	virtual void 	processRGBAImage(imageStruct &image);
+   	virtual void 	processRGBImage(imageStruct &image);
+	virtual void 	processYUVImage(imageStruct &image);
+   	virtual void 	processGrayImage(imageStruct &image);
+
+	// Messages handling
+	void epsilonMess(double arg);
+	void areaMess(double arg);
+
+    private:
+    
+    t_outlet *m_dataout_middle; // contour outlet
+    t_outlet *m_dataout_right; // info outlet
+    std::vector<std::vector<cv::Point> > m_contours;	
+    double m_area_threshold;	// min area for contour
+    double m_epsilon;
+	    
+};
+#endif	// for header file