fmorphauto_reg.c

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/*====================================================================*
 -  Copyright (C) 2001 Leptonica.  All rights reserved.
 -  This software is distributed in the hope that it will be
 -  useful, but with NO WARRANTY OF ANY KIND.
 -  No author or distributor accepts responsibility to anyone for the
 -  consequences of using this software, or for whether it serves any
 -  particular purpose or works at all, unless he or she says so in
 -  writing.  Everyone is granted permission to copy, modify and
 -  redistribute this source code, for commercial or non-commercial
 -  purposes, with the following restrictions: (1) the origin of this
 -  source code must not be misrepresented; (2) modified versions must
 -  be plainly marked as such; and (3) this notice may not be removed
 -  or altered from any source or modified source distribution.
 *====================================================================*/

/*
 * fmorphauto_reg.c
 *
 *    Basic regression test for erosion & dilation: rasterops & dwa.
 *
 *    Tests erosion and dilation from 58 structuring elements
 *    by comparing the full image rasterop results with the
 *    automatically generated dwa results.
 *
 *    Results must be identical for all operations.
 */

#include <stdio.h>
#include <stdlib.h>
#include "allheaders.h"

    /* defined in morph.c */
LEPT_DLL extern l_int32 MORPH_BC;


main(int    argc,
     char **argv)
{
l_int32      i, nsels, same, xorcount;
char        *filein, *selname;
PIX         *pixs, *pixs1, *pixt1, *pixt2, *pixt3, *pixt4;
SEL         *sel;
SELA        *sela;
static char  mainName[] = "fmorphauto_reg";

    if (argc != 2)
        exit(ERROR_INT(" Syntax:  fmorphauto_reg filein", mainName, 1));

    filein = argv[1];

    if ((pixs = pixRead(filein)) == NULL)
        exit(ERROR_INT("pix not made", mainName, 1));

    sela = selaAddBasic(NULL);
    nsels = selaGetCount(sela);

    for (i = 0; i < nsels; i++)
    {
        sel = selaGetSel(sela, i);
        selname = selGetName(sel);

            /*  ---------  dilation  ----------*/

        pixt1 = pixDilate(NULL, pixs, sel);

        pixs1 = pixAddBorder(pixs, 32, 0);
        pixt2 = pixFMorphopGen_1(NULL, pixs1, L_MORPH_DILATE, selname);
        pixt3 = pixRemoveBorder(pixt2, 32);

        pixt4 = pixXor(NULL, pixt1, pixt3);
        pixZero(pixt4, &same);

        if (same == 1) {
            fprintf(stderr, "dilations are identical for sel %d (%s)\n",
                    i, selname);
        }
        else {
            fprintf(stderr, "dilations differ for sel %d (%s)\n", i, selname);
            pixCountPixels(pixt4, &xorcount, NULL);
            fprintf(stderr, "Number of pixels in XOR: %d\n", xorcount);
        }

        pixDestroy(&pixt1);
        pixDestroy(&pixt2);
        pixDestroy(&pixt3);
        pixDestroy(&pixt4);
        pixDestroy(&pixs1);

            /*  ---------  erosion with asymmetric b.c  ----------*/

        resetMorphBoundaryCondition(ASYMMETRIC_MORPH_BC);
        fprintf(stderr, "MORPH_BC = %d ... ", MORPH_BC);
        pixt1 = pixErode(NULL, pixs, sel);

        if (MORPH_BC == ASYMMETRIC_MORPH_BC)
            pixs1 = pixAddBorder(pixs, 32, 0);  /* OFF border pixels */
        else
            pixs1 = pixAddBorder(pixs, 32, 1);  /* ON border pixels */
        pixt2 = pixFMorphopGen_1(NULL, pixs1, L_MORPH_ERODE, selname);
        pixt3 = pixRemoveBorder(pixt2, 32);

        pixt4 = pixXor(NULL, pixt1, pixt3);
        pixZero(pixt4, &same);

        if (same == 1) {
            fprintf(stderr, "erosions are identical for sel %d (%s)\n",
                    i, selname);
        }
        else {
            fprintf(stderr, "erosions differ for sel %d (%s)\n", i, selname);
            pixCountPixels(pixt4, &xorcount, NULL);
            fprintf(stderr, "Number of pixels in XOR: %d\n", xorcount);
        }

        pixDestroy(&pixt1);
        pixDestroy(&pixt2);
        pixDestroy(&pixt3);
        pixDestroy(&pixt4);
        pixDestroy(&pixs1);
        
            /*  ---------  erosion with symmetric b.c  ----------*/

        resetMorphBoundaryCondition(SYMMETRIC_MORPH_BC);
        fprintf(stderr, "MORPH_BC = %d ... ", MORPH_BC);
        pixt1 = pixErode(NULL, pixs, sel);

        if (MORPH_BC == ASYMMETRIC_MORPH_BC)
            pixs1 = pixAddBorder(pixs, 32, 0);  /* OFF border pixels */
        else
            pixs1 = pixAddBorder(pixs, 32, 1);  /* ON border pixels */
        pixt2 = pixFMorphopGen_1(NULL, pixs1, L_MORPH_ERODE, selname);
        pixt3 = pixRemoveBorder(pixt2, 32);

        pixt4 = pixXor(NULL, pixt1, pixt3);
        pixZero(pixt4, &same);

        if (same == 1) {
            fprintf(stderr, "erosions are identical for sel %d (%s)\n",
                    i, selname);
        }
        else {
            fprintf(stderr, "erosions differ for sel %d (%s)\n", i, selname);
            pixCountPixels(pixt4, &xorcount, NULL);
            fprintf(stderr, "Number of pixels in XOR: %d\n", xorcount);
        }

        pixDestroy(&pixt1);
        pixDestroy(&pixt2);
        pixDestroy(&pixt3);
        pixDestroy(&pixt4);
        pixDestroy(&pixs1);
    }

    exit(0);
}