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/*====================================================================*
- 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.
*====================================================================*/
/*
* findpattern1.c
*
* findpattern1 filein patternfile fileout
*
* This is setup with input parameters to generate a hit-miss
* Sel from 'patternfile' and use it on 'filein' at 300 ppi.
* For example, use char.tif of a "c" bitmap, taken from the
* the page image feyn.tif:
*
* findpattern1 feyn.tif char.tif /tmp/result.tif
*
* This shows a number of different outputs, including a magnified
* image of the Sel superimposed on the "c" bitmap.
*/
#ifdef HAVE_CONFIG_H
#include <config_auto.h>
#endif /* HAVE_CONFIG_H */
#include "allheaders.h"
/* for pixGenerateSelWithRuns() */
static const l_int32 NumHorLines = 11;
static const l_int32 NumVertLines = 8;
static const l_int32 MinRunlength = 1;
/* for pixDisplayHitMissSel() */
static const l_uint32 HitColor = 0xff880000;
static const l_uint32 MissColor = 0x00ff8800;
int main(int argc,
char **argv)
{
char *filein, *fileout, *patternfile;
l_int32 w, h, i, n;
BOX *box, *boxe;
BOXA *boxa1, *boxa2;
PIX *pixs, *pixp, *pixpe, *pix1, *pix2, *pix3, *pix4, *pixhmt;
PIXCMAP *cmap;
SEL *sel_2h, *sel;
static char mainName[] = "findpattern1";
if (argc != 4)
return ERROR_INT(" Syntax: findpattern1 filein patternfile fileout",
mainName, 1);
filein = argv[1];
patternfile = argv[2];
fileout = argv[3];
setLeptDebugOK(1);
lept_mkdir("lept/hmt");
if ((pixs = pixRead(filein)) == NULL)
return ERROR_INT("pixs not made", mainName, 1);
if ((pixp = pixRead(patternfile)) == NULL)
return ERROR_INT("pixp not made", mainName, 1);
pixGetDimensions(pixp, &w, &h, NULL);
/* Generate the hit-miss Sel with runs */
sel = pixGenerateSelWithRuns(pixp, NumHorLines, NumVertLines, 0,
MinRunlength, 7, 7, 0, 0, &pixpe);
/* Display the Sel two ways */
selWriteStream(stderr, sel);
pix1 = pixDisplayHitMissSel(pixpe, sel, 9, HitColor, MissColor);
pixDisplay(pix1, 200, 200);
pixWrite("/tmp/lept/hmt/pix1.png", pix1, IFF_PNG);
/* Use the Sel to find all instances in the page */
startTimer();
pixhmt = pixHMT(NULL, pixs, sel);
lept_stderr("Time to find patterns = %7.3f\n", stopTimer());
/* Small erosion to remove noise; typically not necessary if
* there are enough elements in the Sel */
sel_2h = selCreateBrick(1, 2, 0, 0, SEL_HIT);
pix2 = pixErode(NULL, pixhmt, sel_2h);
/* Display the result visually by placing the Sel at each
* location found */
pix3 = pixDilate(NULL, pix2, sel);
cmap = pixcmapCreate(1);
pixcmapAddColor(cmap, 255, 255, 255);
pixcmapAddColor(cmap, 255, 0, 0);
pixSetColormap(pix3, cmap);
pixWrite(fileout, pix3, IFF_PNG);
/* Display output with a red outline around each located pattern */
boxa1 = pixConnCompBB(pix2, 8);
n = boxaGetCount(boxa1);
boxa2 = boxaCreate(n);
pix4 = pixConvert1To2Cmap(pixs);
for (i = 0; i < n; i++) {
box = boxaGetBox(boxa1, i, L_COPY);
boxe = boxCreate(box->x - w / 2, box->y - h / 2, w + 4, h + 4);
boxaAddBox(boxa2, boxe, L_INSERT);
pixRenderBoxArb(pix4, boxe, 2, 255, 0, 0);
boxDestroy(&box);
}
pixWrite("/tmp/lept/hmt/outline.png", pix4, IFF_PNG);
boxaWriteStream(stderr, boxa2);
pixDestroy(&pixs);
pixDestroy(&pixp);
pixDestroy(&pixpe);
pixDestroy(&pix1);
pixDestroy(&pix2);
pixDestroy(&pix3);
pixDestroy(&pix4);
pixDestroy(&pixhmt);
selDestroy(&sel);
selDestroy(&sel_2h);
boxaDestroy(&boxa1);
boxaDestroy(&boxa2);
return 0;
}
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