1 #ifndef _IMAGES_SIGNATURE_H
2 #define _IMAGES_SIGNATURE_H
5 extern uns image_sig_min_width, image_sig_min_height;
6 extern uns *image_sig_prequant_thresholds;
7 extern uns image_sig_postquant_min_steps, image_sig_postquant_max_steps, image_sig_postquant_threshold;
8 extern double image_sig_border_size;
9 extern int image_sig_border_bonus;
10 extern double image_sig_textured_threshold;
11 extern int image_sig_compare_method;
12 extern uns image_sig_cmp_features_weights[];
15 #define IMAGE_REG_F IMAGE_VEC_F
17 #define IMAGE_REG_MAX 16
19 /* K-dimensional feature vector (6 bytes) */
21 byte f[IMAGE_VEC_F]; /* texture features */
24 /* Fetures for image regions (16 bytes) */
26 byte f[IMAGE_VEC_F]; /* texture features */
27 u16 h[IMAGE_REG_H]; /* shape features */
28 u16 wa; /* normalized area percentage */
29 u16 wb; /* normalized weight */
32 #define IMAGE_SIG_TEXTURED 0x1
34 /* Image signature (11 + len * 16 bytes) */
35 struct image_signature {
36 byte len; /* Number of regions */
37 byte flags; /* IMAGE_SIG_xxx */
38 byte df; /* Average f dist */
39 u16 dh; /* Average h dist */
40 struct image_vector vec; /* Combination of all regions... simple signature */
41 struct image_region reg[IMAGE_REG_MAX];/* Feature vector for every region */
44 struct image_cluster {
47 s32 dot; /* Dot product of the splitting plane */
48 s8 vec[IMAGE_VEC_F]; /* Normal vector of the splitting plane */
51 u64 pos; /* Cluster size in bytes */
57 image_signature_size(uns len)
59 return 5 + sizeof(struct image_vector) + len * sizeof(struct image_region);
64 #define IMAGE_VECTOR_DUMP_MAX (IMAGE_VEC_F * 16 + 1)
65 #define IMAGE_REGION_DUMP_MAX ((IMAGE_REG_F + IMAGE_REG_H) * 16 + 100)
67 byte *image_vector_dump(byte *buf, struct image_vector *vec);
68 byte *image_region_dump(byte *buf, struct image_region *reg);
70 struct image_sig_block {
71 struct image_sig_block *next; /* linked list */
72 u32 x, y; /* block position */
73 byte area; /* block area in pixels (usually 16) */
74 byte region; /* region index */
75 byte v[IMAGE_VEC_F]; /* feature vector */
78 struct image_sig_region {
79 struct image_sig_block *blocks;
88 struct image_sig_data {
90 struct image_sig_block *blocks;
91 struct image_sig_region regions[IMAGE_REG_MAX];
106 int compute_image_signature(struct image_thread *thread, struct image_signature *sig, struct image *image);
108 int image_sig_init(struct image_thread *thread, struct image_sig_data *data, struct image *image);
109 void image_sig_preprocess(struct image_sig_data *data);
110 void image_sig_finish(struct image_sig_data *data, struct image_signature *sig);
111 void image_sig_cleanup(struct image_sig_data *data);
115 void image_sig_segmentation(struct image_sig_data *data);
119 void image_sig_detect_textured(struct image_sig_data *data);
123 uns image_signatures_dist(struct image_signature *sig1, struct image_signature *sig2);
124 uns image_signatures_dist_explain(struct image_signature *sig1, struct image_signature *sig2, void (*msg)(byte *text, void *param), void *param);