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_inertia_scale[];
11 extern double image_sig_textured_threshold;
12 extern int image_sig_compare_method;
13 extern uns image_sig_cmp_features_weights[];
16 #define IMAGE_REG_F IMAGE_VEC_F
18 #define IMAGE_REG_MAX 16
20 /* K-dimensional feature vector (6 bytes) */
22 byte f[IMAGE_VEC_F]; /* texture features */
25 /* Fetures for image regions (16 bytes) */
27 byte f[IMAGE_VEC_F]; /* texture features - L, u, v, LH, HL, HH */
28 byte h[IMAGE_REG_H]; /* shape/pos features - I1, I2, I3, X, Y */
29 byte wa; /* normalized area percentage */
30 byte wb; /* normalized weight */
34 #define IMAGE_SIG_TEXTURED 0x1
36 /* Image signature (11 + len * 16 bytes) */
37 struct image_signature {
38 byte len; /* Number of regions */
39 byte flags; /* IMAGE_SIG_xxx */
40 u16 df; /* Average weighted f dist */
41 u16 dh; /* Average weighted h dist */
42 struct image_vector vec; /* Average features of all regions... simple signature */
43 struct image_region reg[IMAGE_REG_MAX];/* Feature vector for every region */
46 struct image_cluster {
49 s32 dot; /* Dot product of the splitting plane */
50 s8 vec[IMAGE_VEC_F]; /* Normal vector of the splitting plane */
53 u64 pos; /* Cluster size in bytes */
59 image_signature_size(uns len)
61 return OFFSETOF(struct image_signature, reg) + len * sizeof(struct image_region);
66 #define IMAGE_VECTOR_DUMP_MAX (IMAGE_VEC_F * 16 + 1)
67 #define IMAGE_REGION_DUMP_MAX ((IMAGE_REG_F + IMAGE_REG_H) * 16 + 100)
69 byte *image_vector_dump(byte *buf, struct image_vector *vec);
70 byte *image_region_dump(byte *buf, struct image_region *reg);
72 struct image_sig_block {
73 struct image_sig_block *next; /* linked list */
74 u32 x, y; /* block position */
75 byte area; /* block area in pixels (usually 16) */
76 byte region; /* region index */
77 byte v[IMAGE_VEC_F]; /* feature vector */
80 struct image_sig_region {
81 struct image_sig_block *blocks;
90 struct image_sig_data {
92 struct image_sig_block *blocks;
93 struct image_sig_region regions[IMAGE_REG_MAX];
108 int compute_image_signature(struct image_thread *thread, struct image_signature *sig, struct image *image);
110 int image_sig_init(struct image_thread *thread, struct image_sig_data *data, struct image *image);
111 void image_sig_preprocess(struct image_sig_data *data);
112 void image_sig_finish(struct image_sig_data *data, struct image_signature *sig);
113 void image_sig_cleanup(struct image_sig_data *data);
117 void image_sig_segmentation(struct image_sig_data *data);
121 void image_sig_detect_textured(struct image_sig_data *data);
125 uns image_signatures_dist(struct image_signature *sig1, struct image_signature *sig2);
126 uns image_signatures_dist_explain(struct image_signature *sig1, struct image_signature *sig2, void (*msg)(byte *text, void *param), void *param);