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73 lines
2.0 KiB
73 lines
2.0 KiB
8 years ago
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Library usage
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-------------
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Database know nothing about location of the source images,
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records addressed only by some numeric id.
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Example usage:
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <simdb.h>
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int main() {
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simdb_t *sdb = NULL;
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simdb_search_t search;
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simdb_match_t *match = NULL;
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const char *path = "/tmp/test.sdb";
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const char *files[] = {
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"/path/to/file/a.jpg",
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"/path/to/file/b.png",
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"/path/to/file/c.bmp",
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};
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int ret = 0;
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if (!simdb_create(path)) {
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perror("can't create test database");
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return 1;
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}
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sdb = simdb_open(path, SIMDB_FLAG_WRITE | SIMDB_FLAG_LOCKNB, &ret);
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if (!sdb) {
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fprintf(stderr, "can't open test simdb: %s\n", simdb_error(ret));
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return 1;
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}
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for (int i = 0; i < sizeof(files); i++) {
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ret = simdb_record_add(sdb, i, files[i], 0);
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if (ret < 0) {
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fprintf(stderr, "can't add file from %s: %s\n", files[i], simdb_error(ret));
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}
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}
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simdb_search_init(&search);
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/* tune search parameters */
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search.d_ratio = 0.1; /* max difference in ratio -- 10% */
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search.d_bitmap = 0.08; /* max difference in ratio -- 8% */
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/* compare given file against database */
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const char *sample = "/path/to/file/d.png";
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simdb_search_file(sdb, &search, sample);
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/* show search results if any */
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if (search.found) {
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printf("file %s similar to:\n", sample);
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for (int i = 0; i < search.found; i++) {
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match = &search.matches[i];
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printf("- %s (%d %%)\n", files[match->num], (int) match->d_bitmap * 100);
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}
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/* free search results */
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simdb_search_free(&search);
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}
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simdb_close(sdb);
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unlink(path);
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return 0;
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}
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You may build this example with next command:
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gcc -Wall -std=c99 -O0 -pedantic -lsimdb -o simdb-usage-test test.c
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