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Comparing CV/CV.xs (file contents):
Revision 1.32 by root, Wed Feb 15 08:36:55 2006 UTC vs.
Revision 1.40 by root, Sat Nov 25 15:00:51 2006 UTC

… …
2#include "perl.h" 2#include "perl.h"
3#include "XSUB.h" 3#include "XSUB.h"
4 4
5#include <string.h> 5#include <string.h>
6#include <setjmp.h> 6#include <setjmp.h>
7#include <math.h>
7 8
8#include <magic.h> 9#include <magic.h>
9 10
10#include <jpeglib.h> 11#include <jpeglib.h>
11#include <glib.h> 12#include <glib.h>
… …
13#include <gdk-pixbuf/gdk-pixbuf.h> 14#include <gdk-pixbuf/gdk-pixbuf.h>
14 15
15#include <gperl.h> 16#include <gperl.h>
16#include <gtk2perl.h> 17#include <gtk2perl.h>
17 18
18#define IW 80 /* MUST match Schnauer.pm! */ 19#define IW 80 /* MUST match Schnauzer.pm! */
19#define IH 60 /* MUST match Schnauer.pm! */ 20#define IH 60 /* MUST match Schnauzer.pm! */
20 21
21#define RAND (seed = (seed + 7141) * 54773 % 134456) 22#define RAND (seed = (seed + 7141) * 54773 % 134456)
22 23
23#define LINELENGTH 240 24#define LINELENGTH 240
24 25
… …
67 68
68 *h &= 255; 69 *h &= 255;
69 } 70 }
70} 71}
71 72
73struct feature {
74 float v1, v2, v3; // mean, square, cube
75 int n;
76};
77
78static void
79feature_init (struct feature *f)
80{
81 f->v1 = 0.;
82 f->v2 = 0.;
83 f->v3 = 0.;
84 f->n = 0;
85}
86
87// didn't find an algorithm to neatly do mean, variance and skew in one pass.
88// elmex ist schuld.
89static void
90feature_update_pass_1 (struct feature *f, unsigned int v)
91{
92 f->v1 += v;
93 f->n += 1;
94}
95
96static void
97feature_finish_pass_1 (struct feature *f)
98{
99 if (f->n < 1)
100 return;
101
102 f->v1 /= f->n;
103}
104
105static void
106feature_update_pass_2 (struct feature *f, unsigned int v)
107{
108 float d = v - f->v1;
109
110 f->v2 += d * d;
111 f->v3 += d * d * d;
112}
113
114static void
115feature_finish_pass_2 (struct feature *f)
116{
117 if (f->n < 1)
118 return;
119
120 f->v2 /= f->n;
121 f->v3 /= f->n;
122
123 f->v1 /= 255.;
124 f->v2 /= 255. * 255.; f->v2 = sqrtf (f->v2);
125 f->v3 /= 255. * 255. * 255.; f->v3 = powf (fabsf (f->v3), 1./3.);
126}
127
72static guint32 a85_val; 128static guint32 a85_val;
73static guint a85_cnt; 129static guint a85_cnt;
74static guchar a85_buf[LINELENGTH], *a85_ptr; 130static guchar a85_buf[LINELENGTH], *a85_ptr;
75 131
76static void 132static void
… …
187 RETVAL = magic_file (cookie, path); 243 RETVAL = magic_file (cookie, path);
188} 244}
189 OUTPUT: 245 OUTPUT:
190 RETVAL 246 RETVAL
191 247
192# missing in Gtk2 perl module 248# missing/broken in Gtk2 perl module
249
250void
251gdk_window_clear_hints (GdkWindow *window)
252 CODE:
253 gdk_window_set_geometry_hints (window, 0, 0);
193 254
194gboolean 255gboolean
195gdk_net_wm_supports (GdkAtom property) 256gdk_net_wm_supports (GdkAtom property)
196 CODE: 257 CODE:
197#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE) 258#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
… …
330 fclose (fp); 391 fclose (fp);
331 jpeg_destroy_decompress (&cinfo); 392 jpeg_destroy_decompress (&cinfo);
332} 393}
333 OUTPUT: 394 OUTPUT:
334 RETVAL 395 RETVAL
396
397void
398compare (GdkPixbuf *a, GdkPixbuf *b)
399 PPCODE:
400{
401 int w = gdk_pixbuf_get_width (a);
402 int h = gdk_pixbuf_get_height (a);
403 int sa = gdk_pixbuf_get_rowstride (a);
404 int sb = gdk_pixbuf_get_rowstride (b);
405
406 guchar *pa = gdk_pixbuf_get_pixels (a);
407 guchar *pb = gdk_pixbuf_get_pixels (b);
408
409 int x, y;
410
411 assert (w == gdk_pixbuf_get_width (b));
412 assert (h == gdk_pixbuf_get_height (b));
413
414 assert (gdk_pixbuf_get_n_channels (a) == 3);
415 assert (gdk_pixbuf_get_n_channels (b) == 3);
416
417 double diff = 0.;
418 int peak = 0;
419
420 if (w && h)
421 for (y = 0; y < h; y++)
422 {
423 guchar *pa_ = pa + y * sa;
424 guchar *pb_ = pb + y * sb;
425
426 for (x = 0; x < w; x++)
427 {
428 int d;
429
430 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
431 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
432 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
433 }
434 }
435
436 EXTEND (SP, 2);
437 PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));
438 PUSHs (sv_2mortal (newSVnv (peak / 255.)));
439}
335 440
336############################################################################# 441#############################################################################
337 442
338MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer 443MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
339 444
… …
541############################################################################# 646#############################################################################
542 647
543MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster 648MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
544 649
545SV * 650SV *
546make_histograms (SV *ar) 651extract_features (SV *ar)
547 CODE: 652 CODE:
548{ 653{
549 int i; 654 int i;
550 AV *av, *result; 655 AV *av, *result;
551 656
552 if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV) 657 if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV)
553 croak ("Not an array ref as first argument to make_histogram"); 658 croak ("Not an array ref as first argument to extract_features");
554 659
555 av = (AV *) SvRV (ar); 660 av = (AV *) SvRV (ar);
556 result = newAV (); 661 result = newAV ();
557 662
558 for (i = 0; i <= av_len (av); ++i) 663 for (i = 0; i <= av_len (av); ++i)
559 { 664 {
560 const int HISTSIZE = 64;
561
562 int j;
563 SV *sv = *av_fetch (av, i, 1); 665 SV *sv = *av_fetch (av, i, 1);
564 STRLEN len;
565 char *buf = SvPVbyte (sv, len);
566
567 int tmphist[HISTSIZE];
568 float *hist;
569
570 SV *histsv = newSV (HISTSIZE * sizeof (float) + 1); 666 SV *histsv = newSV (9 * sizeof (float) + 1);
667
571 SvPOK_on (histsv); 668 SvPOK_on (histsv);
572 SvCUR_set (histsv, HISTSIZE * sizeof (float)); 669 SvCUR_set (histsv, 9 * sizeof (float));
573 hist = (float *)SvPVX (histsv); 670 float *hist = (float *)SvPVX (histsv);
574 671
575 Zero (tmphist, sizeof (tmphist), char); 672 struct feature f_h, f_s, f_v;
673 feature_init (&f_h);
674 feature_init (&f_s);
675 feature_init (&f_v);
576 676
577 for (j = len; j--; )
578 {
579 unsigned int idx
580 = ((*buf & 0xc0) >> 2)
581 | ((*buf & 0x18) >> 1)
582 | (*buf & 0x03);
583
584 ++tmphist[idx];
585 ++buf;
586 }
587 677 {
588 for (j = 0; j < HISTSIZE; ++j) 678 STRLEN len;
589 hist[j] = (float)tmphist[j] / (len + 1e-30); 679 unsigned char *buf = (unsigned char *)SvPVbyte (sv, len);
680 while (len >= 3)
681 {
682 unsigned int r, g, b, h, s, v;
683 r = *buf++; g = *buf++; b = *buf++;
684 rgb_to_hsv (r, g, b, &h, &s, &v);
685
686 feature_update_pass_1 (&f_h, h);
687 feature_update_pass_1 (&f_s, s);
688 feature_update_pass_1 (&f_v, v);
689
690 len -= 3;
691 }
692
693 feature_finish_pass_1 (&f_h);
694 feature_finish_pass_1 (&f_s);
695 feature_finish_pass_1 (&f_v);
696 }
697
698 {
699 STRLEN len;
700 unsigned char *buf = (unsigned char *)SvPVbyte (sv, len);
701 while (len >= 3)
702 {
703 unsigned int r, g, b, h, s, v;
704 r = *buf++; g = *buf++; b = *buf++;
705 rgb_to_hsv (r, g, b, &h, &s, &v);
706
707 feature_update_pass_2 (&f_h, h);
708 feature_update_pass_2 (&f_s, s);
709 feature_update_pass_2 (&f_v, v);
710
711 len -= 3;
712 }
713
714 feature_finish_pass_2 (&f_h);
715 feature_finish_pass_2 (&f_s);
716 feature_finish_pass_2 (&f_v);
717 }
718
719 hist [0] = f_h.v1 * 2.; hist [1] = f_h.v2 * 2.; hist [2] = f_h.v3 * 2.;
720 hist [3] = f_s.v1 ; hist [4] = f_s.v2 ; hist [5] = f_s.v3 ;
721 hist [6] = f_v.v1 * .5; hist [7] = f_v.v2 * .5; hist [8] = f_v.v3 * .5;
590 722
591 av_push (result, histsv); 723 av_push (result, histsv);
592 } 724 }
593 725
594 RETVAL = newRV_noinc ((SV *)result); 726 RETVAL = newRV_noinc ((SV *)result);
595} 727}
596 OUTPUT: 728 OUTPUT:
597 RETVAL 729 RETVAL
598 730
599

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