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

/*
 * watershedtest.c
 *
 */

#include <math.h>
#include "allheaders.h"

int main(int    argc,
         char **argv)
{
l_int32      i, j, w, h, empty;
l_uint32     redval, greenval;
l_float32    f;
L_WSHED     *wshed;
PIX         *pixs, *pixc, *pixd;
PIX         *pix1, *pix2, *pix3, *pix4, *pix5, *pix6, *pix7, *pix8;
PIXA        *pixac;
PTA         *pta;
static char  mainName[] = "watershedtest";

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

    pixac = pixaCreate(0);
    pixs = pixCreate(500, 500, 8);
    pixGetDimensions(pixs, &w, &h, NULL);
    for (i = 0; i < 500; i++) {
        for (j = 0; j < 500; j++) {
#if 1
            f = 128.0 + 26.3 * sin(0.0438 * (l_float32)i);
            f += 33.4 * cos(0.0712 * (l_float32)i);
            f += 18.6 * sin(0.0561 * (l_float32)j);
            f += 23.6 * cos(0.0327 * (l_float32)j);
#else
            f = 128.0 + 26.3 * sin(0.0238 * (l_float32)i);
            f += 33.4 * cos(0.0312 * (l_float32)i);
            f += 18.6 * sin(0.0261 * (l_float32)j);
            f += 23.6 * cos(0.0207 * (l_float32)j);
#endif
            pixSetPixel(pixs, j, i, (l_int32)f);
        }
    }
    pixSaveTiled(pixs, pixac, 1.0, 1, 10, 32);
    pixWrite("/tmp/pattern.png", pixs, IFF_PNG);
    startTimer();
    pixLocalExtrema(pixs, 0, 0, &pix1, &pix2);
    fprintf(stderr, "Time for extrema: %7.3f\n", stopTimer());
    pixSetOrClearBorder(pix1, 2, 2, 2, 2, PIX_CLR);
    composeRGBPixel(255, 0, 0, &redval);
    composeRGBPixel(0, 255, 0, &greenval);
    pixc = pixConvertTo32(pixs);
    pixPaintThroughMask(pixc, pix2, 0, 0, greenval);
    pixPaintThroughMask(pixc, pix1, 0, 0, redval);
    pixSaveTiled(pixc, pixac, 1.0, 0, 10, 32);
    pixWrite("/tmp/pixc.png", pixc, IFF_PNG);
    pixSaveTiled(pix1, pixac, 1.0, 0, 10, 32);
    pixSelectMinInConnComp(pixs, pix1, &pta, NULL);
/*    ptaWriteStream(stderr, pta, 1); */
    pix3 = pixGenerateFromPta(pta, w, h);
    pixSaveTiled(pix3, pixac, 1.0, 1, 10, 32);

    pix4 = pixConvertTo32(pixs);
    pixPaintThroughMask(pix4, pix3, 0, 0, greenval);
    pixSaveTiled(pix4, pixac, 1.0, 0, 10, 32);
    pix5 = pixRemoveSeededComponents(NULL, pix3, pix1, 8, 2);
    pixSaveTiled(pix5, pixac, 1.0, 0, 10, 32);
    pixZero(pix5, &empty);
    fprintf(stderr, "Is empty?  %d\n", empty);
    pixDestroy(&pix4);
    pixDestroy(&pix5);

    wshed = wshedCreate(pixs, pix3, 10, 0);
    startTimer();
    wshedApply(wshed);
    fprintf(stderr, "Time for wshed: %7.3f\n", stopTimer());
    pix6 = pixaDisplayRandomCmap(wshed->pixad, w, h);
    pixSaveTiled(pix6, pixac, 1.0, 1, 10, 32);
    numaWriteStream(stderr, wshed->nalevels);
    pix7 = wshedRenderFill(wshed);
    pixSaveTiled(pix7, pixac, 1.0, 0, 10, 32);
    pix8 = wshedRenderColors(wshed);
    pixSaveTiled(pix8, pixac, 1.0, 0, 10, 32);
    wshedDestroy(&wshed);

    pixd = pixaDisplay(pixac, 0, 0);
    pixDisplay(pixd, 100, 100);
    pixWrite("/tmp/wshed.png", pixd, IFF_PNG);
    pixDestroy(&pixd);
    pixaDestroy(&pixac);

    pixDestroy(&pix1);
    pixDestroy(&pix2);
    pixDestroy(&pix3);
    pixDestroy(&pix6);
    pixDestroy(&pix7);
    pixDestroy(&pix8);
    pixDestroy(&pixs);
    pixDestroy(&pixc);
    ptaDestroy(&pta);
    return 0;
}