1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
/*
* filters.c
*
* Image filtering
*
* (c) 2006-2010 Thomas White <taw@physics.org>
*
* Part of CrystFEL - crystallography with a FEL
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include <string.h>
#include <assert.h>
#include <gsl/gsl_statistics_int.h>
#ifdef GSL_FUDGE
#include <gsl/gsl_blas.h>
#endif
#include "image.h"
static int compare_vals(const void *ap, const void *bp)
{
const signed int a = *(signed int *)ap;
const signed int b = *(signed int *)bp;
if ( a > b ) return 1;
if ( a < b ) return -1;
return 0;
}
static void clean_panel(struct image *image, int sx, int sy)
{
int x, y;
const int s = sizeof(signed int);
for ( x=0; x<512; x++ ) {
signed int vals[128];
double m;
for ( y=0; y<128; y++ ) {
vals[y] = image->data[(x+sx)+(y+sy)*image->width];
}
qsort(&vals[0], 128, s, compare_vals);
m = gsl_stats_int_median_from_sorted_data(vals, 1, 128);
for ( y=0; y<128; y++ ) {
image->data[(x+sx)+(y+sy)*image->width] -= m;
}
}
}
/* Pre-processing to make life easier */
void filter_cm(struct image *image)
{
int px, py;
if ( (image->width != 1024) || (image->height != 1024) ) return;
for ( px=0; px<2; px++ ) {
for ( py=0; py<8; py++ ) {
clean_panel(image, 512*px, 128*py);
}
}
}
void filter_noise(struct image *image, float *old)
{
int x, y;
for ( x=0; x<image->width; x++ ) {
for ( y=0; y<image->height; y++ ) {
int dx, dy;
int val = image->data[x+image->width*y];
if ( old != NULL ) old[x+image->width*y] = val;
/* FIXME: This isn't really the right thing to do
* at the edges. */
if ( (x==0) || (x==image->width-1)
|| (y==0) || (y==image->height-1) ) {
if ( val < 0 ) val = 0;
continue;
}
for ( dx=-1; dx<=+1; dx++ ) {
for ( dy=-1; dy<=+1; dy++ ) {
int val2;
val2 = image->data[(x+dx)+image->width*(y+dy)];
if ( val2 < 0 ) val = 0;
}
}
image->data[x+image->width*y] = val;
}
}
}
#ifdef GSL_FUDGE
/* Force the linker to bring in CBLAS to make GSL happy */
void fudge_gslcblas()
{
STATUS("%p\n", cblas_sgemm);
}
#endif
|
