pranavjha/text-detector

/*====================================================================*
 -  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.
 *====================================================================*/

/*
 * boxa1_reg.c
 */

#include "allheaders.h"

static PIX *DisplayBoxa(BOXA  *boxa);

int main(int    argc,
         char **argv)
{
l_int32      same;
l_float32    diffarea, diffxor;
BOX         *box;
BOXA        *boxa1, *boxa2;
PIX         *pix1, *pixdb;
static char  mainName[] = "boxa1_reg";

    if (argc != 1)
        return ERROR_INT(" Syntax: boxa1_reg", mainName, 1);

        /* Make a boxa and display its contents */
    boxa1 = boxaCreate(6);
    box = boxCreate(60, 60, 40, 20);
    boxaAddBox(boxa1, box, L_INSERT);
    box = boxCreate(120, 50, 20, 50);
    boxaAddBox(boxa1, box, L_INSERT);
    box = boxCreate(50, 140, 46, 60);
    boxaAddBox(boxa1, box, L_INSERT);
    box = boxCreate(166, 130, 64, 28);
    boxaAddBox(boxa1, box, L_INSERT);
    box = boxCreate(64, 224, 44, 34);
    boxaAddBox(boxa1, box, L_INSERT);
    box = boxCreate(117, 206, 26, 74);
    boxaAddBox(boxa1, box, L_INSERT);
    pix1 = DisplayBoxa(boxa1);
    pixDisplay(pix1, 100, 100);
    pixDestroy(&pix1);

    boxaCompareRegions(boxa1, boxa1, 100, &same, &diffarea, &diffxor, NULL);
    fprintf(stderr, "same = %d, diffarea = %5.3f, diffxor = %5.3f\n",
            same, diffarea, diffxor);

    boxa2 = boxaTransform(boxa1, -13, -13, 1.0, 1.0);
    boxaCompareRegions(boxa1, boxa2, 10, &same, &diffarea, &diffxor, NULL);
    fprintf(stderr, "same = %d, diffarea = %5.3f, diffxor = %5.3f\n",
            same, diffarea, diffxor);
    boxaDestroy(&boxa2);

    boxa2 = boxaReconcileEvenOddHeight(boxa1, L_ADJUST_TOP_AND_BOT, 6,
                                       L_ADJUST_CHOOSE_MIN, 1.0);
    pix1 = DisplayBoxa(boxa2);
    pixDisplay(pix1, 100, 500);
    pixDestroy(&pix1);

    boxaCompareRegions(boxa1, boxa2, 10, &same, &diffarea, &diffxor, &pixdb);
    fprintf(stderr, "same = %d, diffarea = %5.3f, diffxor = %5.3f\n",
            same, diffarea, diffxor);
    pixDisplay(pixdb, 700, 100);

    pixDestroy(&pixdb);
    boxaDestroy(&boxa1);
    boxaDestroy(&boxa2);
    return 0;
}


static PIX *
DisplayBoxa(BOXA  *boxa)
{
l_int32  w, h;
BOX     *box;
PIX     *pix1, *pix2, *pix3;
PIXA    *pixa;

    pixa = pixaCreate(2);
    boxaGetExtent(boxa, &w, &h, &box);
    pix1 = pixCreate(w, h, 1);
    pixMaskBoxa(pix1, pix1, boxa, L_SET_PIXELS);
    pixaAddPix(pixa, pix1, L_INSERT);
    pix2 = pixCreate(w, h, 32);
    pixSetAll(pix2);
    pixRenderBoxaArb(pix2, boxa, 2, 0, 255, 0);
    pixRenderBoxArb(pix2, box, 3, 255, 0, 0);
    pixaAddPix(pixa, pix2, L_INSERT);
    pix3 = pixaDisplayTiledInRows(pixa, 32, 1000, 1.0, 0, 30, 2);
    boxDestroy(&box);
    pixaDestroy(&pixa);
    return pix3;
}