From ed47c1557915bb2472f6959e723cd76155312a98 Mon Sep 17 00:00:00 2001
From: Chris Xiong <chirs241097@gmail.com>
Date: Mon, 6 Apr 2020 00:50:58 +0800
Subject: Add deduper (unfinished tool for finding image duplicates).

---
 deduper/libpuzzle/src/puzzle-diff.c | 130 ++++++++++++++++++++++++++++++++++++
 1 file changed, 130 insertions(+)
 create mode 100644 deduper/libpuzzle/src/puzzle-diff.c

(limited to 'deduper/libpuzzle/src/puzzle-diff.c')

diff --git a/deduper/libpuzzle/src/puzzle-diff.c b/deduper/libpuzzle/src/puzzle-diff.c
new file mode 100644
index 0000000..e0f3626
--- /dev/null
+++ b/deduper/libpuzzle/src/puzzle-diff.c
@@ -0,0 +1,130 @@
+#include "puzzle_common.h"
+#include "puzzle.h"
+
+typedef struct Opts_ {
+    const char *file1;    
+    const char *file2;
+    int fix_for_texts;
+    int exit;
+    double similarity_threshold;
+} Opts;
+
+void usage(void)
+{
+    puts("\nUsage: puzzle-diff [-b <contrast barrier for cropping] [-c]\n"
+         "   [-C <max cropping ratio>] [-e] [-E similarity threshold] [-h]\n"
+         "   [-H <max height>] [-l <lambdas>] [-n <noise cutoff>]\n"
+         "   [-p <p ratio>] [-t] [-W <max width>] <file 1> <file 2>\n\n"
+         "Visually compares two images and returns their distance.\n\n"
+         "-b <contrast barrier for cropping>\n"
+         "-c : disable autocrop\n"
+         "-C <max cropping ratio>\n"
+         "-e : exit with 10 (images are similar) or 20 (images are not)\n"
+         "-E <similarity threshold> : for -e\n"
+         "-h : show help\n"
+         "-H <width> : set max height\n"
+         "-l <lambdas> : change lambdas\n"
+         "-n <noise cutoff> : change noise cutoff\n"
+         "-p <ratio> : set p ratio\n"
+         "-t disable fix for texts\n"
+         "-W <width> : set max width\n"
+         "\n");
+    exit(EXIT_SUCCESS);
+}
+
+int parse_opts(Opts * const opts, PuzzleContext * context,
+               int argc, char * const *argv) {
+    int opt;
+    extern char *optarg;
+    extern int optind;
+
+    opts->fix_for_texts = 1;
+    opts->exit = 0;
+    opts->similarity_threshold = PUZZLE_CVEC_SIMILARITY_THRESHOLD;
+    while ((opt = getopt(argc, argv, "b:cC:eE:hH:l:n:p:tW:")) != -1) {
+        switch (opt) {
+        case 'b':
+            puzzle_set_contrast_barrier_for_cropping(context, atof(optarg));
+            break;
+        case 'c':
+            puzzle_set_autocrop(context, 0);
+            break;            
+        case 'C':
+            puzzle_set_max_cropping_ratio(context, atof(optarg));
+            break;
+        case 'e':
+            opts->exit = 1;
+            break;
+        case 'E':
+            opts->similarity_threshold = atof(optarg);
+            break;
+        case 'h':
+            usage();
+            /* NOTREACHED */
+        case 'H':
+            puzzle_set_max_height(context, strtoul(optarg, NULL, 10));
+            break;
+        case 'l':
+            puzzle_set_lambdas(context, strtoul(optarg, NULL, 10));
+            break;
+        case 'n':
+            puzzle_set_noise_cutoff(context, atof(optarg));
+            break;
+        case 'p':
+            puzzle_set_p_ratio(context, atof(optarg));
+            break;
+        case 't':
+            opts->fix_for_texts = 0;
+            break;
+        case 'W':
+            puzzle_set_max_width(context, strtoul(optarg, NULL, 10));
+            break;
+        default:
+            usage();
+            /* NOTREACHED */            
+        }
+    }
+    argc -= optind;
+    argv += optind;
+    if (argc != 2) {
+        usage();
+    }
+    opts->file1 = *argv++;
+    opts->file2 = *argv;
+    
+    return 0;
+}
+
+int main(int argc, char *argv[])
+{
+    Opts opts;
+    PuzzleContext context;
+    PuzzleCvec cvec1, cvec2;
+    double d;
+    
+    puzzle_init_context(&context);    
+    parse_opts(&opts, &context, argc, argv);
+    puzzle_init_cvec(&context, &cvec1);
+    puzzle_init_cvec(&context, &cvec2);
+    if (puzzle_fill_cvec_from_file(&context, &cvec1, opts.file1) != 0) {    
+        fprintf(stderr, "Unable to read [%s]\n", opts.file1);
+        return 1;
+    }
+    if (puzzle_fill_cvec_from_file(&context, &cvec2, opts.file2) != 0) {
+        fprintf(stderr, "Unable to read [%s]\n", opts.file2);
+        return 1;
+    }
+    d = puzzle_vector_normalized_distance(&context, &cvec1, &cvec2,
+                                          opts.fix_for_texts);
+    puzzle_free_cvec(&context, &cvec1);
+    puzzle_free_cvec(&context, &cvec2);
+    puzzle_free_context(&context);
+    if (opts.exit == 0) {
+        printf("%g\n", d);
+        return 0;
+    }
+    if (d > opts.similarity_threshold) {
+        return 20;
+    }
+    return 10;
+}
-- 
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