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/***************************************************************************
* ho_array_stat.h
*
* Fri Aug 12 20:13:33 2005
* Copyright 2005-2008 Yaacov Zamir
* <kzamir@walla.co.il>
****************************************************************************/
/*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file ho_array_stat.h
@brief libhocr C language header.
libhocr - LIBrary for Hebrew Optical Character Recognition
*/
#ifndef HO_ARRAY_STAT_H
#define HO_ARRAY_STAT_H 1
#include <ho_pixbuf.h>
#include <ho_bitmap.h>
#include <ho_array.h>
#define ho_array_stat_set_sum(m,x,y,val) (((m)->data_sums)[(x)+(y)*(m)->width]=(val))
#define ho_array_stat_set_sqr_sum(m,x,y,val) (((m)->data_squre_sums)[(x)+(y)*(m)->width]=(val))
#define ho_array_stat_add_sum(m,x,y,val) (((m)->data_sums)[(x)+(y)*(m)->width]+=(val))
#define ho_array_stat_add_sqr_sum(m,x,y,val) (((m)->data_squre_sums)[(x)+(y)*(m)->width]+=(val))
#define ho_array_stat_get_sum(m,x,y) (((m)->data_sums)[(x)+(y)*(m)->width])
#define ho_array_stat_get_sqr_sum(m,x,y) (((m)->data_squre_sums)[(x)+(y)*(m)->width])
#define ho_array_stat_get_width(m) ((m)->width)
#define ho_array_stat_get_height(m) ((m)->height)
#define ho_array_stat_get_size(m) ((m)->size)
#define ho_array_stat_get_threshold(m) ((m)->threshold)
#define ho_array_stat_set_threshold(m,t) ((m)->threshold=(t))
#define ho_array_stat_get_data(m) ((m)->data)
/** @struct ho_array_stat
@brief libhocr array statistics struct
*/
typedef struct
{
/* FIXME: do we need a histogram history of a pixel ? */
int height;
int width;
int size;
double threshold;
double *data_sums;
double *data_squre_sums;
} ho_array_stat;
/**
new ho_array_stat
@param height hight of pixbuf in pixels
@param width width of pixbuf in pixels
@param threshold the threshold for making a mask
@return newly allocated ho_array
*/
ho_array_stat *ho_array_stat_new (const int width, const int height,
double threshold);
/**
free an ho_array_stat
@param pix pointer to an ho_array
@return FALSE
*/
int ho_array_stat_free (ho_array_stat * pix);
/**
init an ho_array_stat from an ho_array
@param pix pointer to an ho_array image
@return newly allocated gray ho_array
*/
unsigned char ho_array_stat_init (ho_array_stat * ar, const ho_array * pix);
/**
add an ho_array to an ho_array_stat
@param pix pointer to an ho_array image
@return newly allocated gray ho_array
*/
unsigned char ho_array_stat_add (ho_array_stat * ar, const ho_array * pix);
/**
new ho_array from ho_array_stat
@param hist pointer to an ho_array_stat
@return newly allocated ho_array
*/
ho_array *ho_array_stat_to_array (const ho_array_stat * ar_st);
/**
new ho_array mask from ho_array_stat and an ho_array
@param ar_st pointer to an ho_array_stst
@param ar pointer to an ho_array
@return newly allocated mask ho_array
*/
ho_array *ho_array_stat_to_array_mask (const ho_array_stat * ar_st,
const ho_array * ar);
#endif /* HO_ARRAY_STAT_H */
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