added discrete fourier transform

svn path=/trunk/externals/pdp_opencv/; revision=11783

4 files changed, 536 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index 4d0f81a..a2246b7 100644
--- a/Makefile
+++ b/Makefile
@@ -37,7 +37,7 @@ endif
 
 .SUFFIXES = $(EXTENSION)
 
-SOURCES = pdp_opencv_threshold.c pdp_opencv_edge.c pdp_opencv_distrans.c pdp_opencv_laplace.c pdp_opencv_motempl.c pdp_opencv_morphology.c pdp_opencv_haarcascade.c pdp_opencv_contours_convexity.c pdp_opencv_contours_boundingrect.c pdp_opencv_bgsubstract.c pdp_opencv_lk.c pdp_opencv_floodfill.c pdp_opencv_histo.c
+SOURCES = pdp_opencv_threshold.c pdp_opencv_edge.c pdp_opencv_distrans.c pdp_opencv_laplace.c pdp_opencv_motempl.c pdp_opencv_morphology.c pdp_opencv_haarcascade.c pdp_opencv_contours_convexity.c pdp_opencv_contours_boundingrect.c pdp_opencv_bgsubstract.c pdp_opencv_lk.c pdp_opencv_floodfill.c pdp_opencv_histo.c pdp_opencv_dft.c
 
 all: $(SOURCES:.c=.$(EXTENSION))
 
diff --git a/TODO b/TODO
index e2fe0f8..377b8b7 100644
--- a/TODO
+++ b/TODO
@@ -152,3 +152,9 @@ write text ... http://www.hci.iastate.edu/575x/doku.php?id=code_samples:adding_t
 simple edge ... http://www.hci.iastate.edu/575x/doku.php?id=code_samples:edge_detection
 
 http://www.cs.iit.edu/~agam/cs512/lect-notes/opencv-intro/opencv-intro.html#SECTION00053000000000000000
+
+############################# sevy ++
+adaptive threshold
+hough lines
+hough circles
+arguments in pdp_histo
diff --git a/pdp_opencv_dft-help.pd b/pdp_opencv_dft-help.pd
new file mode 100755
index 0000000..a9ce5d8
--- /dev/null
+++ b/pdp_opencv_dft-help.pd
@@ -0,0 +1,159 @@
+#N canvas 1 49 1424 780 10;
+#X obj -191 -148 cnv 15 621 250 empty empty empty 20 12 0 14 -260097
+-66577 0;
+#X obj -175 -111 tgl 15 0 empty empty empty 17 7 0 10 -262144 -1 -1
+0 1;
+#X obj -175 -84 metro 40;
+#X msg -130 -28 close;
+#X obj -155 14 pdp_v4l;
+#X msg -137 -55 open /dev/video0;
+#X obj -30 -111 tgl 15 0 empty empty empty 17 7 0 10 -262144 -1 -1
+0 1;
+#X obj -30 -84 metro 40;
+#X msg 34 -65 close;
+#X msg 30 -89 open /dev/video0;
+#X obj -10 14 pdp_v4l2;
+#X msg 31 -13 format \$1;
+#X obj 32 -35 hradio 15 1 0 4 empty empty empty 0 -8 0 10 -262144 -1
+-1 0;
+#X text -145 -113 Camera input;
+#X text -188 -181 written by yves degoyon ( ydegoyon@gmail.com );
+#X text 376 -143 input 1;
+#X obj 447 -146 cnv 15 250 250 empty empty empty 20 12 0 14 -260097
+-66577 0;
+#X obj 480 -94 openpanel;
+#X msg 461 -123 bang;
+#X obj 460 -26 pdp_background;
+#X obj 460 51 pdp_imgloader;
+#X obj 460 -49 metro 40;
+#X msg 479 -70 load \$1 0 0;
+#X floatatom 555 -24 5 0 0 0 - - -;
+#X text 507 -124 loading a pattern image;
+#X text 455 -143 input 2 ( pattern );
+#X obj 55 186 pdp_opencv_dft;
+#X obj 462 179 pdp_opencv_dft;
+#X obj -11 43 pdp_scale 320 240;
+#X msg 99 156 bang;
+#X msg 480 152 bang;
+#X obj 191 390 pdp_xv;
+#X obj 298 340 pdp_hue;
+#X floatatom 298 367 5 0 0 0 - - -;
+#X obj 460 81 pdp_xv;
+#X obj -11 74 pdp_xv;
+#X floatatom 325 254 5 0 0 0 - - -;
+#X obj 189 352 pdp_xor;
+#X text 425 435 <- average value of pixels;
+#X text 445 461 the input image is close to the pattern;
+#X obj 265 155 metro 1000;
+#X obj 265 131 bng 15 250 50 0 empty empty empty 17 7 0 10 -262144
+-1 -1;
+#X obj 222 251 loadbang;
+#X obj 300 301 pdp_binary ----------------;
+#X obj 123 301 pdp_binary --------------;
+#X obj 264 105 loadbang;
+#X text -187 -211 pdp_opencv_dft : discrete fourier transform;
+#X text -187 -197 this can be used for pattern matching;
+#X obj 460 21 pdp_scale 320 240;
+#X obj 460 -2 pdp_convert image/YCrCb/*;
+#X obj 328 460 route 1;
+#X msg 380 460 bang;
+#X floatatom 383 436 5 0 0 0 - - -;
+#X obj 301 460 <;
+#X obj 300 386 t f b;
+#X obj 347 411 f;
+#X text 445 448 when it's close to its minimum;
+#X obj 216 65 pdp_qt;
+#X obj 249 1 metro 40;
+#X msg 249 -27 bang;
+#X msg 290 -27 stop;
+#X obj 216 -96 openpanel;
+#X msg 216 -71 open \$1;
+#X msg 216 -124 bang;
+#X msg 250 28 loop \$1;
+#X obj 330 28 tgl 15 0 empty empty empty 17 7 0 10 -262144 -1 -1 1
+1;
+#X obj 330 -54 loadbang;
+#X text 259 -121 playing a video file;
+#X text 506 -112 ( try chini.jpg );
+#X text 281 -108 ( try chini.mov );
+#X obj 314 435 f 1000;
+#X msg 264 65 105;
+#X msg 292 65 bang;
+#X msg 525 -49 1000;
+#X obj 566 -51 s max;
+#X obj 378 411 r max;
+#X msg 284 252 60;
+#X obj 80 356 pdp_xv;
+#X text 369 254 Threshold the fft to eliminate noise;
+#X text 369 266 60 is a godd value to eliminate noise;
+#X text 369 277 and keep meaningful points;
+#X connect 1 0 2 0;
+#X connect 2 0 4 0;
+#X connect 3 0 4 0;
+#X connect 4 0 28 0;
+#X connect 5 0 4 0;
+#X connect 6 0 7 0;
+#X connect 7 0 10 0;
+#X connect 8 0 10 0;
+#X connect 9 0 10 0;
+#X connect 10 0 28 0;
+#X connect 11 0 10 0;
+#X connect 12 0 11 0;
+#X connect 17 0 22 0;
+#X connect 18 0 17 0;
+#X connect 18 0 21 0;
+#X connect 19 0 49 0;
+#X connect 20 0 27 0;
+#X connect 20 0 34 0;
+#X connect 21 0 19 0;
+#X connect 22 0 20 0;
+#X connect 22 0 73 0;
+#X connect 23 0 19 3;
+#X connect 26 0 44 0;
+#X connect 27 0 43 0;
+#X connect 28 0 35 0;
+#X connect 28 0 26 0;
+#X connect 29 0 26 0;
+#X connect 30 0 27 0;
+#X connect 32 0 33 0;
+#X connect 33 0 54 0;
+#X connect 36 0 43 6;
+#X connect 36 0 44 6;
+#X connect 37 0 31 0;
+#X connect 37 0 32 0;
+#X connect 40 0 26 0;
+#X connect 40 0 27 0;
+#X connect 41 0 40 0;
+#X connect 42 0 76 0;
+#X connect 43 0 37 1;
+#X connect 44 0 37 0;
+#X connect 44 0 77 0;
+#X connect 45 0 41 0;
+#X connect 48 0 20 0;
+#X connect 49 0 48 0;
+#X connect 50 0 51 0;
+#X connect 51 0 55 0;
+#X connect 51 0 70 0;
+#X connect 53 0 50 0;
+#X connect 54 0 53 0;
+#X connect 54 0 55 1;
+#X connect 54 1 70 0;
+#X connect 55 0 70 1;
+#X connect 57 0 28 0;
+#X connect 58 0 57 0;
+#X connect 59 0 58 0;
+#X connect 60 0 58 0;
+#X connect 61 0 62 0;
+#X connect 62 0 57 0;
+#X connect 63 0 61 0;
+#X connect 64 0 57 0;
+#X connect 65 0 64 0;
+#X connect 66 0 65 0;
+#X connect 66 0 59 0;
+#X connect 70 0 52 0;
+#X connect 70 0 53 1;
+#X connect 71 0 57 1;
+#X connect 72 0 57 0;
+#X connect 73 0 74 0;
+#X connect 75 0 70 1;
+#X connect 76 0 36 0;
diff --git a/pdp_opencv_dft.c b/pdp_opencv_dft.c
new file mode 100755
index 0000000..59d9f57
--- /dev/null
+++ b/pdp_opencv_dft.c
@@ -0,0 +1,370 @@
+/*
+ *   Pure Data Packet module.
+ *   Copyright (c) by Tom Schouten <pdp@zzz.kotnet.org>
+ *
+ *   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 2 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.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <dirent.h>
+#include <limits.h>
+#include <dlfcn.h>
+
+#include "pdp.h"
+
+#ifndef _EiC
+#include "cv.h"
+#endif
+
+typedef struct pdp_opencv_dft_struct
+{
+    t_object x_obj;
+    t_float x_f;
+
+    t_outlet *x_outlet0;
+    t_outlet *x_outlet1;
+    int x_packet0;
+    int x_packet1;
+    int x_dropped;
+    int x_queue_id;
+
+    int x_width;
+    int x_height;
+    int x_size;
+    int x_calculate;
+    int dft_M;
+    int dft_N;
+
+    // The output and temporary images
+    IplImage  *image;
+    IplImage  *gray;
+    IplImage  *input_re;
+    IplImage  *input_im;
+    IplImage  *input_co;
+    CvMat     *dft_A;
+    IplImage  *image_re;
+    IplImage  *image_im;
+    IplImage  *image_mout;
+    IplImage  *image_pout;
+
+} t_pdp_opencv_dft;
+
+// rearrange the quadrants of Fourier image so that the origin is at
+// the image center
+
+void pdp_opencv_dft_shift_dft(CvArr * src_arr, CvArr * dst_arr )
+{
+    CvMat *tmp=NULL;
+    CvMat q1stub, q2stub;
+    CvMat q3stub, q4stub;
+    CvMat d1stub, d2stub;
+    CvMat d3stub, d4stub;
+    CvMat * q1, * q2, * q3, * q4;
+    CvMat * d1, * d2, * d3, * d4;
+
+    CvSize size = cvGetSize(src_arr);
+    CvSize dst_size = cvGetSize(dst_arr);
+    int cx, cy;
+
+    if(dst_size.width != size.width ||
+       dst_size.height != size.height){
+        error( "pdp_opencv_dft : source and destination arrays must have the same size" );
+    }
+
+    if(src_arr==dst_arr){
+        tmp = cvCreateMat(size.height/2, size.width/2, cvGetElemType(src_arr));
+    }
+   
+    cx = size.width/2;
+    cy = size.height/2; // image center
+
+    q1 = cvGetSubRect( src_arr, &q1stub, cvRect(0,0,cx, cy) );
+    q2 = cvGetSubRect( src_arr, &q2stub, cvRect(cx,0,cx,cy) );
+    q3 = cvGetSubRect( src_arr, &q3stub, cvRect(cx,cy,cx,cy) );
+    q4 = cvGetSubRect( src_arr, &q4stub, cvRect(0,cy,cx,cy) );
+    d1 = cvGetSubRect( src_arr, &d1stub, cvRect(0,0,cx,cy) );
+    d2 = cvGetSubRect( src_arr, &d2stub, cvRect(cx,0,cx,cy) );
+    d3 = cvGetSubRect( src_arr, &d3stub, cvRect(cx,cy,cx,cy) );
+    d4 = cvGetSubRect( src_arr, &d4stub, cvRect(0,cy,cx,cy) );
+
+    if(src_arr!=dst_arr){
+        if( !CV_ARE_TYPES_EQ( q1, d1 )){
+            error( "pdp_opencv_dft : source and destination arrays must have the same format" );
+        }
+        cvCopy(q3, d1, 0);
+        cvCopy(q4, d2, 0);
+        cvCopy(q1, d3, 0);
+        cvCopy(q2, d4, 0);
+    }
+    else{
+        cvCopy(q3, tmp, 0);
+        cvCopy(q1, q3, 0);
+        cvCopy(tmp, q1, 0);
+        cvCopy(q4, tmp, 0);
+        cvCopy(q2, q4, 0);
+        cvCopy(tmp, q2, 0);
+    }
+}
+
+static void pdp_opencv_dft_process_rgb(t_pdp_opencv_dft *x)
+{
+  t_pdp     *header = pdp_packet_header(x->x_packet0);
+  short int *data   = (short int *)pdp_packet_data(x->x_packet0);
+  t_pdp     *newheader = pdp_packet_header(x->x_packet1);;
+  short int *newdata = (short int *)pdp_packet_data(x->x_packet1);; 
+  CvMat tmp;
+  double m,M;
+  int px,py;
+    
+    if ((x->x_width != (t_int)header->info.image.width) || 
+        (x->x_height != (t_int)header->info.image.height)) 
+    {
+    	post("pdp_opencv_dft :: resizing");
+	
+    	x->x_width = header->info.image.width;
+    	x->x_height = header->info.image.height;
+    	x->x_size = x->x_width*x->x_height;
+    
+    	//Destroy cv_images
+    	cvReleaseImage( &x->image );
+    	cvReleaseImage( &x->gray );
+    	cvReleaseImage( &x->input_re );
+    	cvReleaseImage( &x->input_im );
+    	cvReleaseImage( &x->input_co );
+    	cvReleaseMat( &x->dft_A );
+    	cvReleaseImage( &x->image_re );
+    	cvReleaseImage( &x->image_im );
+    	cvReleaseImage( &x->image_mout );
+    	cvReleaseImage( &x->image_pout );
+    
+    	x->image = cvCreateImage(cvSize(x->x_width,x->x_height), IPL_DEPTH_8U, 3);
+    	x->gray = cvCreateImage(cvSize(x->image->width,x->image->height), IPL_DEPTH_8U, 1);
+        x->input_re = cvCreateImage( cvGetSize(x->image), IPL_DEPTH_64F, 1);
+        x->input_im = cvCreateImage( cvGetSize(x->image), IPL_DEPTH_64F, 1);
+        x->input_co = cvCreateImage( cvGetSize(x->image), IPL_DEPTH_64F, 2);
+        x->dft_M = cvGetOptimalDFTSize( x->gray->height - 1 );
+        x->dft_N = cvGetOptimalDFTSize( x->gray->width - 1 );
+        x->dft_A = cvCreateMat( x->dft_M, x->dft_N, CV_64FC2 );
+        x->image_re = cvCreateImage( cvSize(x->dft_N, x->dft_M), IPL_DEPTH_64F, 1);
+        x->image_im = cvCreateImage( cvSize(x->dft_N, x->dft_M), IPL_DEPTH_64F, 1);
+        x->image_mout = cvCreateImage( cvSize(x->image->width, x->image->height), IPL_DEPTH_8U, 1);
+        x->image_pout = cvCreateImage( cvSize(x->image->width, x->image->height), IPL_DEPTH_8U, 1);
+    }
+    
+    newheader->info.image.encoding = PDP_BITMAP_GREY;
+    newheader->info.image.width = x->x_width;
+    newheader->info.image.height = x->x_height;
+
+    memcpy( x->image->imageData, data, x->x_size*3 );
+    cvCvtColor(x->image, x->gray, CV_BGR2GRAY);
+
+    if ( x->x_calculate )
+    {
+      // discrete fourier transform
+      cvScale(x->gray, x->input_re, 1.0, 0.0);
+      cvZero(x->input_im);
+      cvMerge(x->input_re, x->input_im, NULL, NULL, x->input_co);
+  
+      // copy A to dft_A and pad dft_A with zeros
+      cvGetSubRect( x->dft_A, &tmp, cvRect(0,0, x->gray->width, x->gray->height));
+      cvCopy( x->input_co, &tmp, NULL );
+      if( x->dft_A->cols > x->gray->width )
+      {
+          cvGetSubRect( x->dft_A, &tmp, cvRect(x->gray->width,0, x->dft_A->cols - x->gray->width, x->gray->height));
+          cvZero( &tmp );
+      }
+  
+      // no need to pad bottom part of dft_A with zeros because of
+      // use nonzero_rows parameter in cvDFT() call below
+      cvDFT( x->dft_A, x->dft_A, CV_DXT_FORWARD, x->input_co->height );
+  
+      // Split Fourier in real and imaginary parts
+      cvSplit( x->dft_A, x->image_re, x->image_im, 0, 0 );
+  
+      // Compute the magnitude of the spectrum Mag = sqrt(Re^2 + Im^2)
+      cvPow( x->image_re, x->image_re, 2.0);
+      cvPow( x->image_im, x->image_im, 2.0);
+      cvAdd( x->image_re, x->image_im, x->image_re, NULL);
+      cvPow( x->image_re, x->image_re, 0.5 );
+  
+      // Compute log(1 + Mag)
+      cvAddS( x->image_re, cvScalarAll(1.0), x->image_re, NULL ); // 1 + Mag
+      cvLog( x->image_re, x->image_re ); // log(1 + Mag)
+  
+      // Rearrange the quadrants of Fourier image so that the origin is at
+      // the image center
+      pdp_opencv_dft_shift_dft( x->image_re, x->image_re );
+  
+      // normalize image
+      cvMinMaxLoc(x->image_re, &m, &M, NULL, NULL, NULL);
+      cvScale(x->image_re, x->image_re, 255.0/(M-m), 255.0*(-m)/(M-m));
+  
+      for( py=0; py<x->image_re->height; py++ ) {
+         double* ptri = (double*) ( x->image_re->imageData + py * x->image_re->widthStep);
+         unsigned char* ptrp = (unsigned char*) ( x->image_mout->imageData + py * x->image_mout->widthStep);
+         for( px=0; px<x->image_re->width; px++ ) {
+           if ( *(ptrp+px) > 255.0 ) post( "pdp_opencv_dft : error value over 255" );
+           (*(ptrp+px)) = (unsigned char)( (*(ptri+px)) );
+         }
+      }
+ 
+      x->x_calculate=0;
+    }
+
+    cvCvtColor(x->image_mout, x->image, CV_GRAY2RGB);
+    memcpy( newdata, x->image->imageData, x->x_size*3 );
+
+    return;
+}
+
+static void pdp_opencv_dft_sendpacket(t_pdp_opencv_dft *x)
+{
+    /* release the packet */
+    pdp_packet_mark_unused(x->x_packet0);
+    x->x_packet0 = -1;
+
+    /* unregister and propagate if valid dest packet */
+    pdp_packet_pass_if_valid(x->x_outlet0, &x->x_packet1);
+}
+
+static void pdp_opencv_dft_process(t_pdp_opencv_dft *x)
+{
+   int encoding;
+   t_pdp *header = 0;
+
+   /* check if image data packets are compatible */
+   if ( (header = pdp_packet_header(x->x_packet0))
+	&& (PDP_BITMAP == header->type)){
+    
+	/* pdp_opencv_dft_process inputs and write into active inlet */
+	switch(pdp_packet_header(x->x_packet0)->info.image.encoding){
+
+	case PDP_BITMAP_RGB:
+            x->x_packet1 = pdp_packet_clone_rw(x->x_packet0);
+            pdp_queue_add(x, pdp_opencv_dft_process_rgb, pdp_opencv_dft_sendpacket, &x->x_queue_id);
+	    break;
+
+	default:
+	    /* don't know the type, so dont pdp_opencv_dft_process */
+	    break;
+	    
+	}
+    }
+
+}
+
+static void pdp_opencv_dft_calculate(t_pdp_opencv_dft *x)
+{
+    x->x_calculate=1;
+}
+
+static void pdp_opencv_dft_input_0(t_pdp_opencv_dft *x, t_symbol *s, t_floatarg f)
+{
+    /* if this is a register_ro message or register_rw message, register with packet factory */
+
+    if (s == gensym("register_rw")) 
+       x->x_dropped = pdp_packet_convert_ro_or_drop(&x->x_packet0, (int)f, pdp_gensym("bitmap/rgb/*") );
+
+    if ((s == gensym("process")) && (-1 != x->x_packet0) && (!x->x_dropped))
+    {
+        /* add the process method and callback to the process queue */
+        pdp_opencv_dft_process(x);
+    }
+}
+
+static void pdp_opencv_dft_free(t_pdp_opencv_dft *x)
+{
+  int i;
+
+    pdp_queue_finish(x->x_queue_id);
+    pdp_packet_mark_unused(x->x_packet0);
+    
+    //destroy cv structures
+    cvReleaseImage( &x->image );
+    cvReleaseImage( &x->gray );
+    cvReleaseImage( &x->input_re );
+    cvReleaseImage( &x->input_im );
+    cvReleaseImage( &x->input_co );
+    cvReleaseMat( &x->dft_A );
+    cvReleaseImage( &x->image_re );
+    cvReleaseImage( &x->image_im );
+    cvReleaseImage( &x->image_mout );
+    cvReleaseImage( &x->image_pout );
+}
+
+t_class *pdp_opencv_dft_class;
+
+
+void *pdp_opencv_dft_new(t_floatarg f)
+{
+    int i;
+
+    t_pdp_opencv_dft *x = (t_pdp_opencv_dft *)pd_new(pdp_opencv_dft_class);
+
+    x->x_outlet0 = outlet_new(&x->x_obj, &s_anything); 
+    x->x_outlet1 = outlet_new(&x->x_obj, &s_anything); 
+
+    x->x_packet0 = -1;
+    x->x_packet1 = -1;
+    x->x_queue_id = -1;
+
+    x->x_width  = 320;
+    x->x_height = 240;
+    x->x_size   = x->x_width * x->x_height;
+
+    x->image = cvCreateImage(cvSize(x->x_width,x->x_height), IPL_DEPTH_8U, 3);
+    x->gray = cvCreateImage(cvSize(x->image->width,x->image->height), IPL_DEPTH_8U, 1);
+    x->input_re = cvCreateImage( cvGetSize(x->image), IPL_DEPTH_64F, 1);
+    x->input_im = cvCreateImage( cvGetSize(x->image), IPL_DEPTH_64F, 1);
+    x->input_co = cvCreateImage( cvGetSize(x->image), IPL_DEPTH_64F, 2);
+    x->dft_M = cvGetOptimalDFTSize( x->gray->height - 1 );
+    x->dft_N = cvGetOptimalDFTSize( x->gray->width - 1 );
+    x->dft_A = cvCreateMat( x->dft_M, x->dft_N, CV_64FC2 );
+    x->image_re = cvCreateImage( cvSize(x->dft_N, x->dft_M), IPL_DEPTH_64F, 1);
+    x->image_im = cvCreateImage( cvSize(x->dft_N, x->dft_M), IPL_DEPTH_64F, 1);
+    x->image_mout = cvCreateImage( cvSize(x->dft_N, x->dft_M), IPL_DEPTH_8U, 1);
+    x->image_pout = cvCreateImage( cvSize(x->dft_N, x->dft_M), IPL_DEPTH_8U, 1);
+
+    // calculate first dft
+    x->x_calculate=1;
+
+    return (void *)x;
+}
+
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+
+void pdp_opencv_dft_setup(void)
+{
+
+    post( "		pdp_opencv_dft");
+    pdp_opencv_dft_class = class_new(gensym("pdp_opencv_dft"), (t_newmethod)pdp_opencv_dft_new,
+    	(t_method)pdp_opencv_dft_free, sizeof(t_pdp_opencv_dft), 0, A_DEFFLOAT, A_NULL);
+
+    class_addmethod(pdp_opencv_dft_class, (t_method)pdp_opencv_dft_input_0, gensym("pdp"),  A_SYMBOL, A_DEFFLOAT, A_NULL);
+    class_addmethod(pdp_opencv_dft_class, (t_method)pdp_opencv_dft_calculate, gensym("bang"), A_NULL);
+
+}
+
+#ifdef __cplusplus
+}
+#endif