twain3.0/3rdparty/hgOCR/leptonica/jbclass.h

/*====================================================================*
 -  Copyright (C) 2001 Leptonica.  All rights reserved.
 -
 -  Redistribution and use in source and binary forms, with or without
 -  modification, are permitted provided that the following conditions
 -  are met:
 -  1. Redistributions of source code must retain the above copyright
 -     notice, this list of conditions and the following disclaimer.
 -  2. Redistributions in binary form must reproduce the above
 -     copyright notice, this list of conditions and the following
 -     disclaimer in the documentation and/or other materials
 -     provided with the distribution.
 -
 -  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 -  ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 -  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 -  A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL ANY
 -  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 -  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 -  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 -  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 -  OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 -  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 -  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *====================================================================*/

#ifndef  LEPTONICA_JBCLASS_H
#define  LEPTONICA_JBCLASS_H

/*!
 * \file jbclass.h
 *
 *       JbClasser
 *       JbData
 */


    /*!
     * <pre>
     * The JbClasser struct holds all the data accumulated during the
     * classification process that can be used for a compressed
     * jbig2-type representation of a set of images.  This is created
     * in an initialization process and added to as the selected components
     * on each successive page are analyzed.
     * </pre>
     */
struct JbClasser
{
    struct Sarray   *safiles;      /*!< input page image file names          */
    l_int32          method;       /*!< JB_RANKHAUS, JB_CORRELATION          */
    l_int32          components;   /*!< JB_CONN_COMPS, JB_CHARACTERS or      */
                                   /*!< JB_WORDS                             */
    l_int32          maxwidth;     /*!< max component width allowed          */
    l_int32          maxheight;    /*!< max component height allowed         */
    l_int32          npages;       /*!< number of pages already processed    */
    l_int32          baseindex;    /*!< number components already processed  */
                                   /*!< on fully processed pages             */
    struct Numa     *nacomps;      /*!< number of components on each page    */
    l_int32          sizehaus;     /*!< size of square struct elem for haus  */
    l_float32        rankhaus;     /*!< rank val of haus match, each way     */
    l_float32        thresh;       /*!< thresh value for correlation score   */
    l_float32        weightfactor; /*!< corrects thresh value for heaver     */
                                   /*!< components; use 0 for no correction  */
    struct Numa     *naarea;       /*!< w * h of each template, without      */
                                   /*!< extra border pixels                  */
    l_int32          w;            /*!< max width of original src images     */
    l_int32          h;            /*!< max height of original src images    */
    l_int32          nclass;       /*!< current number of classes            */
    l_int32          keep_pixaa;   /*!< If zero, pixaa isn't filled          */
    struct Pixaa    *pixaa;        /*!< instances for each class; unbordered */
    struct Pixa     *pixat;        /*!< templates for each class; bordered   */
                                   /*!< and not dilated                      */
    struct Pixa     *pixatd;       /*!< templates for each class; bordered   */
                                   /*!< and dilated                          */
    struct L_DnaHash *dahash;      /*!< Hash table to find templates by size */
    struct Numa     *nafgt;        /*!< fg areas of undilated templates;     */
                                   /*!< only used for rank < 1.0             */
    struct Pta      *ptac;         /*!< centroids of all bordered cc         */
    struct Pta      *ptact;        /*!< centroids of all bordered template cc */
    struct Numa     *naclass;      /*!< array of class ids for each component */
    struct Numa     *napage;       /*!< array of page nums for each component */
    struct Pta      *ptaul;        /*!< array of UL corners at which the     */
                                   /*!< template is to be placed for each    */
                                   /*!< component                            */
    struct Pta      *ptall;        /*!< similar to ptaul, but for LL corners */
};
typedef struct JbClasser  JBCLASSER;


    /*!
     * <pre>
     * The JbData struct holds all the data required for
     * the compressed jbig-type representation of a set of images.
     * The data can be written to file, read back, and used
     * to regenerate an approximate version of the original,
     * which differs in two ways from the original:
     *   (1) It uses a template image for each c.c. instead of the
     *       original instance, for each occurrence on each page.
     *   (2) It discards components with either a height or width larger
     *       than the maximuma, given here by the lattice dimensions
     *       used for storing the templates.
     * </pre>
     */
struct JbData
{
    struct Pix      *pix;        /*!< template composite for all classes    */
    l_int32          npages;     /*!< number of pages                       */
    l_int32          w;          /*!< max width of original page images     */
    l_int32          h;          /*!< max height of original page images    */
    l_int32          nclass;     /*!< number of classes                     */
    l_int32          latticew;   /*!< lattice width for template composite  */
    l_int32          latticeh;   /*!< lattice height for template composite */
    struct Numa     *naclass;    /*!< array of class ids for each component */
    struct Numa     *napage;     /*!< array of page nums for each component */
    struct Pta      *ptaul;      /*!< array of UL corners at which the      */
                                 /*!< template is to be placed for each     */
                                 /*!< component                             */
};
typedef struct JbData  JBDATA;


/*! JB Classifier */
enum {
    JB_RANKHAUS = 0,
    JB_CORRELATION = 1
};

    /*! For jbGetComponents(): type of component to extract from images */
/*! JB Component */
enum {
    JB_CONN_COMPS = 0,
    JB_CHARACTERS = 1,
    JB_WORDS = 2
};

    /*! These parameters are used for naming the two files
     * in which the jbig2-like compressed data is stored.  */
#define   JB_TEMPLATE_EXT      ".templates.png"
#define   JB_DATA_EXT          ".data"


#endif  /* LEPTONICA_JBCLASS_H */