mirror of
https://github.com/tesseract-ocr/tesseract.git
synced 2024-11-28 13:49:35 +08:00
4523ce9f7d
git-svn-id: https://tesseract-ocr.googlecode.com/svn/trunk@526 d0cd1f9f-072b-0410-8dd7-cf729c803f20
97 lines
3.7 KiB
C
97 lines
3.7 KiB
C
/******************************************************************************
|
|
** Filename: kdtree.h
|
|
** Purpose: Definition of K-D tree access routines.
|
|
** Author: Dan Johnson
|
|
** History: 3/11/89, DSJ, Created.
|
|
** 5/23/89, DSJ, Added circular feature capability.
|
|
**
|
|
** (c) Copyright Hewlett-Packard Company, 1988.
|
|
** Licensed under the Apache License, Version 2.0 (the "License");
|
|
** you may not use this file except in compliance with the License.
|
|
** You may obtain a copy of the License at
|
|
** http://www.apache.org/licenses/LICENSE-2.0
|
|
** Unless required by applicable law or agreed to in writing, software
|
|
** distributed under the License is distributed on an "AS IS" BASIS,
|
|
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
** See the License for the specific language governing permissions and
|
|
** limitations under the License.
|
|
******************************************************************************/
|
|
#ifndef KDTREE_H
|
|
#define KDTREE_H
|
|
|
|
/*-----------------------------------------------------------------------------
|
|
Include Files and Type Defines
|
|
-----------------------------------------------------------------------------*/
|
|
#include "host.h"
|
|
#include "cutil.h"
|
|
#include "ocrfeatures.h"
|
|
|
|
/**
|
|
NOTE: All circular parameters of all keys must be in the range
|
|
|
|
Min <= Param < Max
|
|
|
|
where Min and Max are specified in the KeyDesc parameter passed to
|
|
MakeKDTree. All KD routines assume that this is true and will not operate
|
|
correctly if circular parameters outside the specified range are used.
|
|
*/
|
|
|
|
struct KDNODE {
|
|
FLOAT32 *Key; /**< search key */
|
|
void *Data; /**< data that corresponds to key */
|
|
FLOAT32 BranchPoint; /**< needed to make deletes work efficiently */
|
|
FLOAT32 LeftBranch; /**< used to optimize search pruning */
|
|
FLOAT32 RightBranch; /**< used to optimize search pruning */
|
|
struct KDNODE *Left; /**< ptrs for KD tree structure */
|
|
struct KDNODE *Right;
|
|
};
|
|
|
|
struct KDTREE {
|
|
inT16 KeySize; /* number of dimensions in the tree */
|
|
KDNODE Root; /* Root.Left points to actual root node */
|
|
PARAM_DESC KeyDesc[1]; /* description of each dimension */
|
|
};
|
|
|
|
/*----------------------------------------------------------------------------
|
|
Macros
|
|
-----------------------------------------------------------------------------*/
|
|
#define RootOf(T) ((T)->Root.Left->Data)
|
|
|
|
/*-----------------------------------------------------------------------------
|
|
Public Function Prototypes
|
|
-----------------------------------------------------------------------------*/
|
|
KDTREE *MakeKDTree(inT16 KeySize, const PARAM_DESC KeyDesc[]);
|
|
|
|
void KDStore(KDTREE *Tree, FLOAT32 *Key, void *Data);
|
|
|
|
void KDDelete(KDTREE * Tree, FLOAT32 Key[], void *Data);
|
|
|
|
void KDNearestNeighborSearch(
|
|
KDTREE *Tree, FLOAT32 Query[], int QuerySize, FLOAT32 MaxDistance,
|
|
int *NumberOfResults, void **NBuffer, FLOAT32 DBuffer[]);
|
|
|
|
void KDWalk(KDTREE *Tree, void_proc Action, void *context);
|
|
|
|
void FreeKDTree(KDTREE *Tree);
|
|
|
|
/*-----------------------------------------------------------------------------
|
|
Private Function Prototypes
|
|
-----------------------------------------------------------------------------*/
|
|
KDNODE *MakeKDNode(KDTREE *tree, FLOAT32 Key[], void *Data, int Index);
|
|
|
|
void FreeKDNode(KDNODE *Node);
|
|
|
|
FLOAT32 DistanceSquared(int k, PARAM_DESC *dim, FLOAT32 p1[], FLOAT32 p2[]);
|
|
|
|
FLOAT32 ComputeDistance(int k, PARAM_DESC *dim, FLOAT32 p1[], FLOAT32 p2[]);
|
|
|
|
int QueryInSearch(KDTREE *tree);
|
|
|
|
void Walk(KDTREE *tree, void_proc action, void *context,
|
|
KDNODE *SubTree, inT32 Level);
|
|
|
|
void InsertNodes(KDTREE *tree, KDNODE *nodes);
|
|
|
|
void FreeSubTree(KDNODE *SubTree);
|
|
#endif
|