mirror of
https://github.com/tesseract-ocr/tesseract.git
synced 2024-12-29 20:08:19 +08:00
104 lines
4.7 KiB
C
104 lines
4.7 KiB
C
/*====================================================================*
|
|
- Copyright (C) 2001 Leptonica. All rights reserved.
|
|
- This software is distributed in the hope that it will be
|
|
- useful, but with NO WARRANTY OF ANY KIND.
|
|
- No author or distributor accepts responsibility to anyone for the
|
|
- consequences of using this software, or for whether it serves any
|
|
- particular purpose or works at all, unless he or she says so in
|
|
- writing. Everyone is granted permission to copy, modify and
|
|
- redistribute this source code, for commercial or non-commercial
|
|
- purposes, with the following restrictions: (1) the origin of this
|
|
- source code must not be misrepresented; (2) modified versions must
|
|
- be plainly marked as such; and (3) this notice may not be removed
|
|
- or altered from any source or modified source distribution.
|
|
*====================================================================*/
|
|
|
|
#ifndef LEPTONICA_CCBORD_H
|
|
#define LEPTONICA_CCBORD_H
|
|
|
|
/*
|
|
* ccbord.h
|
|
*
|
|
* CCBord: represents a single connected component
|
|
* CCBorda: an array of CCBord
|
|
*/
|
|
|
|
/* Use in ccbaStepChainsToPixCoords() */
|
|
enum {
|
|
CCB_LOCAL_COORDS = 1,
|
|
CCB_GLOBAL_COORDS = 2
|
|
};
|
|
|
|
/* Use in ccbaGenerateSPGlobalLocs() */
|
|
enum {
|
|
CCB_SAVE_ALL_PTS = 1,
|
|
CCB_SAVE_TURNING_PTS = 2
|
|
};
|
|
|
|
|
|
/* CCBord contains:
|
|
*
|
|
* (1) a minimally-clipped bitmap of the component (pix),
|
|
* (2) a boxa consisting of:
|
|
* for the primary component:
|
|
* (xul, yul) pixel location in global coords
|
|
* (w, h) of the bitmap
|
|
* for the hole components:
|
|
* (x, y) in relative coordinates in primary component
|
|
* (w, h) of the hole border (which is 2 pixels
|
|
* larger in each direction than the hole itself)
|
|
* (3) a pta ('start') of the initial border pixel location for each
|
|
* closed curve, all in relative coordinates of the primary
|
|
* component. This is given for the primary component,
|
|
* followed by the hole components, if any.
|
|
* (4) a refcount of the ccbord; used internally when a ccbord
|
|
* is accessed from a ccborda (array of ccbord)
|
|
* (5) a ptaa for the chain code for the border in relative
|
|
* coordinates, where the first pta is the exterior border
|
|
* and all other pta are for interior borders (holes)
|
|
* (6) a ptaa for the global pixel loc rendition of the border,
|
|
* where the first pta is the exterior border and all other
|
|
* pta are for interior borders (holes).
|
|
* This is derived from the local or step chain code.
|
|
* (7) a numaa for the chain code for the border as orientation
|
|
* directions between successive border pixels, where
|
|
* the first numa is the exterior border and all other
|
|
* numa are for interior borders (holes). This is derived
|
|
* from the local chain code. The 8 directions are 0 - 7.
|
|
* (8) a pta for a single chain for each c.c., comprised of outer
|
|
* and hole borders, plus cut paths between them, all in
|
|
* local coords.
|
|
* (9) a pta for a single chain for each c.c., comprised of outer
|
|
* and hole borders, plus cut paths between them, all in
|
|
* global coords.
|
|
*/
|
|
struct CCBord
|
|
{
|
|
struct Pix *pix; /* component bitmap (min size) */
|
|
struct Boxa *boxa; /* regions of each closed curve */
|
|
struct Pta *start; /* initial border pixel locations */
|
|
l_int32 refcount; /* number of handles; start at 1 */
|
|
struct Ptaa *local; /* ptaa of chain pixels (local) */
|
|
struct Ptaa *global; /* ptaa of chain pixels (global) */
|
|
struct Numaa *step; /* numaa of chain code (step dir) */
|
|
struct Pta *splocal; /* pta of single chain (local) */
|
|
struct Pta *spglobal; /* pta of single chain (global) */
|
|
};
|
|
typedef struct CCBord CCBORD;
|
|
|
|
|
|
struct CCBorda
|
|
{
|
|
struct Pix *pix; /* input pix (may be null) */
|
|
l_int32 w; /* width of pix */
|
|
l_int32 h; /* height of pix */
|
|
l_int32 n; /* number of ccbord in ptr array */
|
|
l_int32 nalloc; /* number of ccbord ptrs allocated */
|
|
struct CCBord **ccb; /* ccb ptr array */
|
|
};
|
|
typedef struct CCBorda CCBORDA;
|
|
|
|
|
|
#endif /* LEPTONICA_CCBORD_H */
|
|
|