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
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
/*
* tiff-grayscale.c -- create a Class G (grayscale) TIFF file
* with a gray response curve in linear optical density
*
* Copyright 1990 by Digital Equipment Corporation, Maynard, Massachusetts.
*
* All Rights Reserved
*
* Permission to use, copy, modify, and distribute this software and its
* documentation for any purpose and without fee is hereby granted,
* provided that the above copyright notice appear in all copies and that
* both that copyright notice and this permission notice appear in
* supporting documentation, and that the name of Digital not be
* used in advertising or publicity pertaining to distribution of the
* software without specific, written prior permission.
*
* DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
* ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
* DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
* ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
* WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
*/
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "tiffio.h"
#define WIDTH 512
#define HEIGHT WIDTH
char * programName;
void Usage();
int main(int argc, char **argv)
{
int bits_per_pixel = 8, cmsize, i, j, k,
gray_index, chunk_size = 32, nchunks = 16;
unsigned char * scan_line;
uint16 * gray;
float refblackwhite[2*1];
TIFF * tif;
programName = argv[0];
if (argc != 4)
Usage();
if (!strcmp(argv[1], "-depth"))
bits_per_pixel = atoi(argv[2]);
else
Usage();
switch (bits_per_pixel) {
case 8:
nchunks = 16;
chunk_size = 32;
break;
case 4:
nchunks = 4;
chunk_size = 128;
break;
case 2:
nchunks = 2;
chunk_size = 256;
break;
default:
Usage();
}
cmsize = nchunks * nchunks;
gray = (uint16 *) malloc(cmsize * sizeof(uint16));
gray[0] = 3000;
for (i = 1; i < cmsize; i++)
gray[i] = (uint16) (-log10((double) i / (cmsize - 1)) * 1000);
refblackwhite[0] = 0.0;
refblackwhite[1] = (float)((1L<<bits_per_pixel) - 1);
if ((tif = TIFFOpen(argv[3], "w")) == NULL) {
fprintf(stderr, "can't open %s as a TIFF file\n", argv[3]);
free(gray);
return 0;
}
TIFFSetField(tif, TIFFTAG_IMAGEWIDTH, WIDTH);
TIFFSetField(tif, TIFFTAG_IMAGELENGTH, HEIGHT);
TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, bits_per_pixel);
TIFFSetField(tif, TIFFTAG_COMPRESSION, COMPRESSION_NONE);
TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_MINISBLACK);
TIFFSetField(tif, TIFFTAG_SAMPLESPERPIXEL, 1);
TIFFSetField(tif, TIFFTAG_ROWSPERSTRIP, 1);
TIFFSetField(tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
TIFFSetField(tif, TIFFTAG_REFERENCEBLACKWHITE, refblackwhite);
TIFFSetField(tif, TIFFTAG_TRANSFERFUNCTION, gray);
TIFFSetField(tif, TIFFTAG_RESOLUTIONUNIT, RESUNIT_NONE);
scan_line = (unsigned char *) malloc(WIDTH / (8 / bits_per_pixel));
for (i = 0; i < HEIGHT; i++) {
for (j = 0, k = 0; j < WIDTH;) {
gray_index = (j / chunk_size) + ((i / chunk_size) * nchunks);
switch (bits_per_pixel) {
case 8:
scan_line[k++] = gray_index;
j++;
break;
case 4:
scan_line[k++] = (gray_index << 4) + gray_index;
j += 2;
break;
case 2:
scan_line[k++] = (gray_index << 6) + (gray_index << 4)
+ (gray_index << 2) + gray_index;
j += 4;
break;
}
}
TIFFWriteScanline(tif, scan_line, i, 0);
}
free(scan_line);
TIFFClose(tif);
return 0;
}
void
Usage()
{
fprintf(stderr, "Usage: %s -depth (8 | 4 | 2) tiff-image\n", programName);
exit(0);
}
/*
* Local Variables:
* mode: c
* c-basic-offset: 8
* fill-column: 78
* End:
*/
|