1 #ifndef _IMAGES_IMAGE_SIG_H
2 #define _IMAGES_IMAGE_SIG_H
4 #include "images/images.h"
8 #define IMAGE_REG_MAX 4
10 typedef byte image_feature_t; /* 8 or 16 bits precision */
12 /* K-dimensional feature vector */
14 image_feature_t f[IMAGE_VEC_K];
17 /* K-dimensional interval */
19 struct image_vector vec[2];
22 /* Fetures for image regions */
24 image_feature_t f[IMAGE_REG_K];
28 struct image_signature {
29 struct image_vector vec; /* Combination of all regions... simplier signature */
30 image_feature_t len; /* Number of regions */
31 struct image_region reg[IMAGE_REG_MAX];/* Feature vector for every region */
34 /* Similarity search tree... will be changed */
36 uns count; /* Number of images in the tree */
37 uns depth; /* Tree depth */
38 struct image_bbox bbox; /* Bounding box containing all the */
39 struct image_node *nodes; /* Internal nodes */
40 struct image_leaf *leaves; /* Leaves */
43 /* Internal node in the search tree */
44 #define IMAGE_NODE_LEAF 0x80000000 /* Node contains pointer to leaves array */
45 #define IMAGE_NODE_DIM 0xff /* Split dimension */
50 /* Leaves in the search tree */
51 #define IMAGE_LEAF_LAST 0x80000000 /* Last entry in the list */
52 #define IMAGE_LEAF_BITS(i) (31 / IMAGE_VEC_K) /* Number of bits for relative position in i-th dimension */
54 u32 flags; /* Relative position in bbox and last node flag */
58 #define stk_print_image_vector(v) ({ struct image_vector *_v = v; \
59 byte *_s = (byte *) alloca(IMAGE_VEC_K * 6), *_p = _s + sprintf(_s, "%d", _v->f[0]); \
60 for (uns _i = 1; _i < IMAGE_VEC_K; _i++) _p += sprintf(_p, " %d", _v->f[_i]); _s; })
62 int compute_image_signature(struct image *image, struct image_signature *sig);