mirror of
https://github.com/tesseract-ocr/tesseract.git
synced 2024-11-27 20:59:36 +08:00
c4f4840fbe
git-svn-id: https://tesseract-ocr.googlecode.com/svn/trunk@163 d0cd1f9f-072b-0410-8dd7-cf729c803f20
85 lines
3.3 KiB
C++
85 lines
3.3 KiB
C++
/**********************************************************************
|
|
* File: lmedsq.h (Formerly lms.h)
|
|
* Description: Code for the LMS class.
|
|
* Author: Ray Smith
|
|
* Created: Fri Aug 7 09:30:53 BST 1992
|
|
*
|
|
* (C) Copyright 1992, Hewlett-Packard Ltd.
|
|
** 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 LMEDSQ_H
|
|
#define LMEDSQ_H
|
|
|
|
#include "points.h"
|
|
#include "varable.h"
|
|
#include "scrollview.h"
|
|
#include "notdll.h"
|
|
|
|
class LMS
|
|
{
|
|
public:
|
|
LMS( //constructor
|
|
inT32 size); //no of samples
|
|
~LMS (); //destructor
|
|
void clear(); //clear samples
|
|
void add( //add sample
|
|
FCOORD sample); //sample coords
|
|
void fit( //generate fit
|
|
float &m, //output line
|
|
float &c);
|
|
void constrained_fit( //fixed gradient
|
|
float fixed_m, //forced gradient
|
|
float &out_c); //output line
|
|
void fit_quadratic( //easy quadratic
|
|
float outlier_threshold, //min outlier
|
|
double &a, //x squared
|
|
float &b, //x
|
|
float &c); //constant
|
|
void plot( //plot fit
|
|
ScrollView* win, //window
|
|
ScrollView::Color colour); //colour to draw in
|
|
float error() { //get error
|
|
return fitted ? line_error : -1;
|
|
}
|
|
|
|
private:
|
|
|
|
void pick_line( //random choice
|
|
float &m, //output line
|
|
float &c);
|
|
void pick_quadratic( //random choice
|
|
double &a, //output curve
|
|
float &b,
|
|
float &c);
|
|
void compute_errors( //find errors
|
|
float m, //from line
|
|
float c);
|
|
//find errors
|
|
float compute_quadratic_errors(float outlier_threshold, //min outlier
|
|
double a, //from curve
|
|
float m,
|
|
float c);
|
|
|
|
BOOL8 fitted; //line parts valid
|
|
inT32 samplesize; //max samples
|
|
inT32 samplecount; //current sample size
|
|
FCOORD *samples; //array of samples
|
|
float *errors; //error distances
|
|
double a; //x squared
|
|
float m; //line gradient
|
|
float c;
|
|
float line_error; //error of fit
|
|
};
|
|
extern INT_VAR_H (lms_line_trials, 12, "Number of linew fits to do");
|
|
#endif
|