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Diffstat (limited to 'tesseract/src/ccstruct/quadlsq.h')
-rw-r--r-- | tesseract/src/ccstruct/quadlsq.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/tesseract/src/ccstruct/quadlsq.h b/tesseract/src/ccstruct/quadlsq.h new file mode 100644 index 00000000..a02c0a1d --- /dev/null +++ b/tesseract/src/ccstruct/quadlsq.h @@ -0,0 +1,72 @@ +/********************************************************************** + * 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" + +namespace tesseract { + +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_t 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_t 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 +}; + +} // namespace tesseract + +#endif |