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321 lines
8.1 KiB
321 lines
8.1 KiB
2 months ago
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/*
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* Image similarity testing
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*
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* (c) 2006 Pavel Charvat <pchar@ucw.cz>
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*
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* This software may be freely distributed and used according to the terms
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* of the GNU General Public License.
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*/
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#include <ucw/lib.h>
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#include <ucw/getopt.h>
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#include <ucw/fastbuf.h>
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#include <ucw/base64.h>
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#include <ucw/base224.h>
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#include <images/images.h>
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#include <images/color.h>
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#include <images/signature.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <stdio.h>
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static void NONRET
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usage(void)
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{
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fputs("\
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Usage: ucw-image-sim-test [options] image1 [image2] \n\
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\n\
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-q --quiet no progress messages\n\
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-f --format-1 image1 format (jpeg, gif, png)\n\
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-F --format-2 image2 format\n\
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-g --background background color (hexadecimal RRGGBB)\n\
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-r --segmentation-1 writes image1 segmentation to given file\n\
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-R --segmentation-2 writes image2 segmentation to given file\n\
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-6 --base64 display base64 encoded signature(s)\n\
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-2 --base224 display base224 encoded signature(s)\n\
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", stderr);
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exit(1);
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}
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static char *shortopts = "qf:F:g:t:r:R:62" CF_SHORT_OPTS;
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static struct option longopts[] =
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{
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CF_LONG_OPTS
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{ "quiet", 0, 0, 'q' },
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{ "format-1", 0, 0, 'f' },
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{ "format-2", 0, 0, 'F' },
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{ "background", 0, 0, 'g' },
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{ "segmentation-1", 0, 0, 'r' },
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{ "segmentation-2", 0, 0, 'R' },
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{ "base64", 0, 0, '6' },
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{ "base224", 0, 0, '2' },
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{ NULL, 0, 0, 0 }
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};
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static uint verbose = 1;
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static byte *file_name_1;
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static byte *file_name_2;
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static enum image_format format_1;
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static enum image_format format_2;
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static struct color background_color;
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static byte *segmentation_name_1;
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static byte *segmentation_name_2;
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static uint display_base64;
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static uint display_base224;
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#define MSG(x...) do{ if (verbose) msg(L_INFO, ##x); }while(0)
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#define TRY(x) do{ if (!(x)) exit(1); }while(0)
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static void
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msg_str(byte *s, void *param UNUSED)
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{
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MSG("%s", s);
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}
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static void
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dump_signature(struct image_signature *sig)
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{
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byte buf[MAX(IMAGE_VECTOR_DUMP_MAX, IMAGE_REGION_DUMP_MAX)];
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image_vector_dump(buf, &sig->vec);
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MSG("vector: %s", buf);
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for (uint i = 0; i < sig->len; i++)
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{
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image_region_dump(buf, sig->reg + i);
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MSG("region %u: %s", i, buf);
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}
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uint sig_size = image_signature_size(sig->len);
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if (display_base64)
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{
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byte buf[BASE64_ENC_LENGTH(sig_size) + 1];
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uint enc_size = base64_encode(buf, (byte *)sig, sig_size);
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buf[enc_size] = 0;
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MSG("base64 encoded: %s", buf);
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}
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if (display_base224)
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{
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byte buf[BASE224_ENC_LENGTH(sig_size) + 1];
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uint enc_size = base224_encode(buf, (byte *)sig, sig_size);
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buf[enc_size] = 0;
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MSG("base224 encoded: %s", buf);
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}
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}
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static struct image_context ctx;
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static struct image_io io;
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static void
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write_segmentation(struct image_sig_data *data, byte *fn)
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{
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MSG("Writing segmentation to %s", fn);
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struct fastbuf *fb = bopen(fn, O_WRONLY | O_CREAT | O_TRUNC, 4096);
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struct image *img;
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TRY(img = image_new(&ctx, data->image->cols, data->image->rows, COLOR_SPACE_RGB, NULL));
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image_clear(&ctx, img);
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for (uint i = 0; i < data->regions_count; i++)
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{
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byte c[3];
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double luv[3], xyz[3], srgb[3];
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luv[0] = data->regions[i].a[0] * (4 / 2.55);
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luv[1] = ((int)data->regions[i].a[1] - 128) * (4 / 2.55);
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luv[2] = ((int)data->regions[i].a[2] - 128) * (4 / 2.55);
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luv_to_xyz_exact(xyz, luv);
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xyz_to_srgb_exact(srgb, xyz);
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c[0] = CLAMP(srgb[0] * 255, 0, 255);
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c[1] = CLAMP(srgb[1] * 255, 0, 255);
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c[2] = CLAMP(srgb[2] * 255, 0, 255);
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for (struct image_sig_block *block = data->regions[i].blocks; block; block = block->next)
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{
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uint x1 = block->x * 4;
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uint y1 = block->y * 4;
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uint x2 = MIN(x1 + 4, img->cols);
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uint y2 = MIN(y1 + 4, img->rows);
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byte *p = img->pixels + x1 * 3 + y1 * img->row_size;
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for (uint y = y1; y < y2; y++, p += img->row_size)
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{
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byte *p2 = p;
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for (uint x = x1; x < x2; x++, p2 += 3)
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{
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p2[0] = c[0];
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p2[1] = c[1];
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p2[2] = c[2];
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}
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}
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}
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}
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io.fastbuf = fb;
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io.image = img;
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io.format = image_file_name_to_format(fn);
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TRY(image_io_write(&io));
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image_io_reset(&io);
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image_destroy(img);
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bclose(fb);
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}
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int
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main(int argc, char **argv)
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{
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log_init(argv[0]);
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int opt;
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while ((opt = cf_getopt(argc, argv, shortopts, longopts, NULL)) >= 0)
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switch (opt)
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{
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case 'q':
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verbose = 0;
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break;
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case 'f':
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if (!(format_1 = image_extension_to_format(optarg)))
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usage();
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break;
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case 'F':
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if (!(format_2 = image_extension_to_format(optarg)))
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usage();
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break;
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case 'g':
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{
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if (strlen(optarg) != 6)
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usage();
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errno = 0;
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char *end;
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long int v = strtol(optarg, &end, 16);
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if (errno || *end || v < 0)
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usage();
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color_make_rgb(&background_color, (v >> 16) & 255, (v >> 8) & 255, v & 255);
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}
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break;
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case 'r':
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segmentation_name_1 = optarg;
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break;
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case 'R':
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segmentation_name_2 = optarg;
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break;
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case '6':
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display_base64++;
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break;
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case '2':
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display_base224++;
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break;
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default:
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usage();
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}
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if (argc != optind + 2 && argc != optind + 1)
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usage();
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file_name_1 = argv[optind++];
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if (argc > optind)
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file_name_2 = argv[optind++];
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MSG("Initializing image library");
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random_gen_seed();
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srgb_to_luv_init();
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image_context_init(&ctx);
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struct image *img1, *img2;
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TRY(image_io_init(&ctx, &io));
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if (file_name_1)
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{
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MSG("Reading %s", file_name_1);
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io.fastbuf = bopen(file_name_1, O_RDONLY, 1 << 18);
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io.format = format_1 ? : image_file_name_to_format(file_name_1);
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TRY(image_io_read_header(&io));
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io.flags = COLOR_SPACE_RGB | IMAGE_IO_USE_BACKGROUND;
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if (background_color.color_space)
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io.background_color = background_color;
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else if (!io.background_color.color_space)
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io.background_color = color_black;
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TRY(image_io_read_data(&io, 1));
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bclose(io.fastbuf);
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img1 = io.image;
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MSG("Image size=%ux%u", img1->cols, img1->rows);
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image_io_reset(&io);
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}
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else
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img1 = NULL;
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if (file_name_2)
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{
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MSG("Reading %s", file_name_2);
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io.fastbuf = bopen(file_name_2, O_RDONLY, 1 << 18);
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io.format = format_2 ? : image_file_name_to_format(file_name_2);
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TRY(image_io_read_header(&io));
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io.flags = COLOR_SPACE_RGB | IMAGE_IO_USE_BACKGROUND;
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if (background_color.color_space)
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io.background_color = background_color;
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else if (!io.background_color.color_space)
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io.background_color = color_black;
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TRY(image_io_read_data(&io, 1));
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bclose(io.fastbuf);
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img2 = io.image;
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MSG("Image size=%ux%u", img2->cols, img2->rows);
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image_io_reset(&io);
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}
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else
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img2 = NULL;
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struct image_signature sig1, sig2;
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MSG("Computing signatures");
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if (img1)
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{
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struct image_sig_data data;
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TRY(image_sig_init(&ctx, &data, img1));
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image_sig_preprocess(&data);
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if (data.valid)
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{
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image_sig_segmentation(&data);
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image_sig_detect_textured(&data);
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}
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if (segmentation_name_1)
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write_segmentation(&data, segmentation_name_1);
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image_sig_finish(&data, &sig1);
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image_sig_cleanup(&data);
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dump_signature(&sig1);
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}
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if (img2)
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{
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struct image_sig_data data;
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TRY(image_sig_init(&ctx, &data, img2));
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image_sig_preprocess(&data);
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if (data.valid)
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{
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image_sig_segmentation(&data);
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image_sig_detect_textured(&data);
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}
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if (segmentation_name_2)
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write_segmentation(&data, segmentation_name_2);
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image_sig_finish(&data, &sig2);
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image_sig_cleanup(&data);
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dump_signature(&sig2);
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}
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if (img1 && img2)
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{
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uint dist;
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if (verbose)
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{
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struct fastbuf *fb = bfdopen(0, 4096);
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dist = image_signatures_dist_explain(&sig1, &sig2, msg_str, NULL);
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bclose(fb);
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}
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else
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dist = image_signatures_dist(&sig1, &sig2);
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MSG("dist=%u", dist);
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}
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if (img1)
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image_destroy(img1);
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if (img2)
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image_destroy(img2);
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image_io_cleanup(&io);
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image_context_cleanup(&ctx);
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MSG("Done.");
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return 0;
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}
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