1 #ifndef _IMAGES_SIGNATURE_H
2 #define _IMAGES_SIGNATURE_H
5 #define IMAGE_REG_F IMAGE_VEC_F
7 #define IMAGE_REG_MAX 8
9 /* K-dimensional feature vector */
11 byte f[IMAGE_VEC_F]; /* texture features */
14 /* Fetures for image regions */
16 byte f[IMAGE_VEC_F]; /* texture features */
17 u16 h[IMAGE_REG_H]; /* shape features */
18 byte wa; /* normalized area percentage */
19 byte wb; /* normalized weight */
23 struct image_signature {
24 struct image_vector vec; /* Combination of all regions... simple signature */
25 byte len; /* Number of regions */
26 byte df; /* average f dist */
27 u16 dh; /* average h dist */
28 struct image_region reg[IMAGE_REG_MAX];/* Feature vector for every region */
33 #define IMAGE_VECTOR_DUMP_MAX (IMAGE_VEC_F * 16 + 1)
34 #define IMAGE_REGION_DUMP_MAX ((IMAGE_REG_F + IMAGE_REG_H) * 16 + 100)
36 byte *image_vector_dump(byte *buf, struct image_vector *vec);
37 byte *image_region_dump(byte *buf, struct image_region *reg);
41 void bget_image_signature(struct fastbuf *fb, struct image_signature *sig);
42 void bput_image_signature(struct fastbuf *fb, struct image_signature *sig);
43 int compute_image_signature(struct image_thread *thread, struct image_signature *sig, struct image *image);
47 #define IMAGE_SIG_DIST_SCALE (3 + 3 + 8 + 16)
49 uns image_signatures_dist(struct image_signature *sig1, struct image_signature *sig2);
52 /* K-dimensional interval */
54 struct image_vector vec[2];
57 /* Similarity search tree... will be changed */
59 uns count; /* Number of images in the tree */
60 uns depth; /* Tree depth */
61 struct image_bbox bbox; /* Bounding box containing all the */
62 struct image_node *nodes; /* Internal nodes */
63 struct image_leaf *leaves; /* Leaves */
66 /* Internal node in the search tree */
67 #define IMAGE_NODE_LEAF 0x80000000 /* Node contains pointer to leaves array */
68 #define IMAGE_NODE_DIM 0xff /* Split dimension */
73 /* Leaves in the search tree */
74 #define IMAGE_LEAF_LAST 0x80000000 /* Last entry in the list */
75 #define IMAGE_LEAF_BITS(i) (31 / IMAGE_VEC_K) /* Number of bits for relative position in i-th dimension */
77 u32 flags; /* Relative position in bbox and last node flag */
81 #define stk_print_image_vector(v) ({ struct image_vector *_v = v; \
82 byte *_s = (byte *) alloca(IMAGE_VEC_K * 6), *_p = _s + sprintf(_s, "%d", _v->f[0]); \
83 for (uns _i = 1; _i < IMAGE_VEC_K; _i++) _p += sprintf(_p, " %d", _v->f[_i]); _s; })