mirror of
https://github.com/tesseract-ocr/tesseract.git
synced 2024-12-05 02:47:00 +08:00
c4f4840fbe
git-svn-id: https://tesseract-ocr.googlecode.com/svn/trunk@163 d0cd1f9f-072b-0410-8dd7-cf729c803f20
68 lines
2.1 KiB
C++
68 lines
2.1 KiB
C++
/**********************************************************************
|
|
* File: quadlsq.h (Formerly qlsq.h)
|
|
* Description: Code for least squares approximation of quadratics.
|
|
* Author: Ray Smith
|
|
* Created: Wed Oct 6 15:14:23 BST 1993
|
|
*
|
|
* (C) Copyright 1993, 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 QUADLSQ_H
|
|
#define QUADLSQ_H
|
|
|
|
#include "points.h"
|
|
|
|
class QLSQ
|
|
{
|
|
public:
|
|
QLSQ() { //constructor
|
|
clear(); //set to zeros
|
|
}
|
|
void clear(); //initialize
|
|
|
|
void add( //add element
|
|
double x, //coords to add
|
|
double y);
|
|
void remove( //delete element
|
|
double x, //coords to delete
|
|
double y);
|
|
inT32 count() { //no of elements
|
|
return n;
|
|
}
|
|
|
|
void fit( //fit the given
|
|
int degree); //return actual
|
|
double get_a() { //get x squard
|
|
return a;
|
|
}
|
|
double get_b() { //get x squard
|
|
return b;
|
|
}
|
|
double get_c() { //get x squard
|
|
return c;
|
|
}
|
|
|
|
private:
|
|
inT32 n; //no of elements
|
|
double a, b, c; //result
|
|
double sigx; //sum of x
|
|
double sigy; //sum of y
|
|
double sigxx; //sum x squared
|
|
double sigxy; //sum of xy
|
|
double sigyy; //sum y squared
|
|
long double sigxxx; //sum x cubed
|
|
long double sigxxy; //sum xsquared y
|
|
long double sigxxxx; //sum x fourth
|
|
};
|
|
#endif
|