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-rw-r--r--modules/image_special/pdp_cog.c243
1 files changed, 243 insertions, 0 deletions
diff --git a/modules/image_special/pdp_cog.c b/modules/image_special/pdp_cog.c
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+/*
+ * Pure Data Packet module.
+ * Copyright (c) 2003 by Johannes Taelman <johannes.taelman@rug.ac.be>
+ * API updates 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 "pdp.h"
+#include "pdp_base.h"
+#include <math.h>
+
+typedef struct pdp_cog_struct
+{
+ t_object x_obj;
+ t_float x_f;
+
+ t_outlet *x_outlet0;
+ t_outlet *x_outlet1;
+ t_outlet *x_outlet2;
+ t_outlet *x_outlet3;
+ t_outlet *x_outlet4;
+
+ int x_packet0;
+ int x_threshold;
+ int x_do_thresholding;
+} t_pdp_cog;
+
+
+static void _pdp_cog_perform(t_pdp_cog *x, int width, int height, short int *data0)
+{
+ short int *pp;
+ int nbpixels;
+
+ int y;
+ int h,v;
+
+ int rowsums[width];
+ int columnsums[height];
+
+ float vsum,vvar,vcog,vstd;
+ float hsum,hvar,hcog,hstd;
+
+
+ pp=data0;
+
+ nbpixels=width*height;
+
+ for (h=0;h<width;h++)
+ columnsums[h]=0;
+
+ /* create column & row sums from thresholded data */
+ if (x->x_do_thresholding){
+ for (v=0;v<height;v++){
+ int rs=0;
+ for (h=0;h<width;h++){
+ int d=*pp++;
+
+ d=(d>x->x_threshold) ? d : ((d<-x->x_threshold)?(-d):0);
+ columnsums[h]+= d;
+ rs+=d;
+ }
+ rowsums[v]=rs;
+ }
+ }
+
+ /* don't perform thresholding */
+ else{
+ for (v=0;v<height;v++){
+ int rs=0;
+ for (h=0;h<width;h++){
+ int d=*pp++;
+ columnsums[h]+= d;
+ rs+=d;
+ }
+ rowsums[v]=rs;
+ }
+ }
+
+
+ /* compute vertical mean and standard dev */
+ vsum=1;
+ vvar=height*height/4;
+ vcog=height/2;
+ for (v=0;v<height;v++){
+ float d=rowsums[v];
+ vsum+=d;
+ vcog+=d*v;
+ }
+ vcog/=vsum;
+ for (v=0;v<height;v++){
+ float d=rowsums[v];
+ float f=v-vcog;
+ vvar+=d*f*f;
+ }
+ vstd=sqrt(vvar/vsum)/height;
+
+ /* compute horizontal meaan and standard dev */
+ hsum=1;
+ hvar=width*width/4;
+ hcog=width/2;
+ for (h=0;h<width;h++){
+ float d=columnsums[h];
+ hsum+=d;
+ hcog+=d*h;
+ }
+ hcog/=hsum;
+ for (h=0;h<width;h++){
+ float d=columnsums[h];
+ float f=h-hcog;
+ hvar+=d*f*f;
+ }
+ hstd=sqrt(hvar/hsum)/width;
+
+ /* pass it on */
+ outlet_float(x->x_outlet4,vstd);
+ outlet_float(x->x_outlet3,hstd);
+ outlet_float(x->x_outlet2,vcog/height);
+ outlet_float(x->x_outlet1,hcog/width);
+ outlet_float(x->x_outlet0,(1.0f / (float)(0x7fff)) * hsum/(height*width));
+}
+
+
+// packet is an image/*/* packet or invalid */
+static void pdp_cog_perform(t_pdp_cog *x)
+{
+ t_pdp *header0 = pdp_packet_header(x->x_packet0);
+ void *data0 = pdp_packet_data(x->x_packet0);
+ if (!header0 || !data0) return;
+
+ _pdp_cog_perform(x,
+ header0->info.image.width,
+ header0->info.image.height,
+ data0);
+}
+
+
+
+static void pdp_cog_input_0(t_pdp_cog *x, t_symbol *s, t_floatarg f)
+{
+ int packet = (int)f;
+
+ /* register */
+ if (s == gensym("register_ro")){
+ /* replace if not compatible or we are not interpolating */
+ pdp_packet_mark_unused(x->x_packet0);
+ x->x_packet0 = pdp_packet_convert_ro(packet, pdp_gensym("image/*/*"));
+
+ }
+
+ if (s == gensym("process")){
+ pdp_cog_perform(x);
+ }
+
+}
+
+
+static void pdp_cog_threshold(t_pdp_cog *x, t_floatarg f)
+{
+ x->x_threshold=(int) (f * ((float) 0x7fff));
+}
+
+
+
+static void pdp_cog_free(t_pdp_cog *x)
+{
+ pdp_packet_mark_unused(x->x_packet0);
+}
+
+
+t_class *pdp_cog_class;
+
+
+
+void *pdp_cog_new(void)
+{
+
+ t_pdp_cog *x = (t_pdp_cog *)pd_new(pdp_cog_class);
+
+
+ x->x_outlet0 = outlet_new(&x->x_obj, &s_float);
+ x->x_outlet1 = outlet_new(&x->x_obj, &s_float);
+ x->x_outlet2 = outlet_new(&x->x_obj, &s_float);
+ x->x_outlet3 = outlet_new(&x->x_obj, &s_float);
+ x->x_outlet4 = outlet_new(&x->x_obj, &s_float);
+
+ x->x_packet0 = -1;
+ x->x_do_thresholding = 0;
+
+ return (void *)x;
+}
+
+void *pdp_cog_abs_thresh_new(t_floatarg f)
+{
+ t_pdp_cog *x = (t_pdp_cog *)pdp_cog_new();
+ inlet_new((void *)x, &x->x_obj.ob_pd, gensym("float"),gensym("threshold"));
+ pdp_cog_threshold(x, f);
+ x->x_do_thresholding = 1;
+ return (void *)x;
+}
+
+
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+
+void pdp_cog_setup(void)
+{
+
+ pdp_cog_class = class_new(gensym("pdp_cog"), (t_newmethod)pdp_cog_new,
+ (t_method)pdp_cog_free, sizeof(t_pdp_cog), 0,A_NULL);
+
+ class_addcreator((t_newmethod)pdp_cog_abs_thresh_new, gensym("pdp_cog_abs_thresh"), A_DEFFLOAT, A_NULL);
+
+ class_addmethod(pdp_cog_class, (t_method)pdp_cog_input_0, gensym("pdp"), A_SYMBOL, A_DEFFLOAT, A_NULL);
+
+ class_addmethod(pdp_cog_class, (t_method)pdp_cog_threshold, gensym("threshold"),A_DEFFLOAT, A_NULL);
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+
+