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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.
*====================================================================*/
/*
* lineremoval_reg.c
*
* A fun little application, saved as a regression test.
*/
#ifdef HAVE_CONFIG_H
#include <config_auto.h>
#endif /* HAVE_CONFIG_H */
#include "allheaders.h"
int main(int argc,
char **argv)
{
l_float32 angle, conf, deg2rad;
PIX *pixs, *pix1, *pix2, *pix3, *pix4, *pix5;
PIX *pix6, *pix7, *pix8, *pix9;
PIXA *pixa;
L_REGPARAMS *rp;
if (regTestSetup(argc, argv, &rp))
return 1;
deg2rad = 3.14159 / 180.;
pixs = pixRead("dave-orig.png");
pixa = pixaCreate(0);
/* Threshold to binary, extracting much of the lines */
pix1 = pixThresholdToBinary(pixs, 170);
regTestWritePixAndCheck(rp, pix1, IFF_PNG); /* 0 */
pixaAddPix(pixa, pix1, L_INSERT);
/* Find the skew angle and deskew using an interpolated
* rotator for anti-aliasing (to avoid jaggies) */
pixFindSkew(pix1, &angle, &conf);
pix2 = pixRotateAMGray(pixs, deg2rad * angle, 255);
regTestWritePixAndCheck(rp, pix2, IFF_PNG); /* 1 */
pixaAddPix(pixa, pix2, L_INSERT);
/* Extract the lines to be removed */
pix3 = pixCloseGray(pix2, 51, 1);
regTestWritePixAndCheck(rp, pix3, IFF_PNG); /* 2 */
pixaAddPix(pixa, pix3, L_INSERT);
/* Solidify the lines to be removed */
pix4 = pixErodeGray(pix3, 1, 5);
regTestWritePixAndCheck(rp, pix4, IFF_PNG); /* 3 */
pixaAddPix(pixa, pix4, L_INSERT);
/* Clean the background of those lines */
pix5 = pixThresholdToValue(NULL, pix4, 210, 255);
regTestWritePixAndCheck(rp, pix5, IFF_PNG); /* 4 */
pixaAddPix(pixa, pix5, L_INSERT);
pix6 = pixThresholdToValue(NULL, pix5, 200, 0);
regTestWritePixAndCheck(rp, pix6, IFF_PNG); /* 5 */
pixaAddPix(pixa, pix6, L_COPY);
/* Get paint-through mask for changed pixels */
pix7 = pixThresholdToBinary(pix6, 210);
regTestWritePixAndCheck(rp, pix7, IFF_PNG); /* 6 */
pixaAddPix(pixa, pix7, L_INSERT);
/* Add the inverted, cleaned lines to orig. Because
* the background was cleaned, the inversion is 0,
* so when you add, it doesn't lighten those pixels.
* It only lightens (to white) the pixels in the lines! */
pixInvert(pix6, pix6);
pix8 = pixAddGray(NULL, pix2, pix6);
regTestWritePixAndCheck(rp, pix8, IFF_PNG); /* 7 */
pixaAddPix(pixa, pix8, L_COPY);
pix9 = pixOpenGray(pix8, 1, 9);
regTestWritePixAndCheck(rp, pix9, IFF_PNG); /* 8 */
pixaAddPix(pixa, pix9, L_INSERT);
pixCombineMasked(pix8, pix9, pix7);
regTestWritePixAndCheck(rp, pix8, IFF_PNG); /* 9 */
pixaAddPix(pixa, pix8, L_INSERT);
if (rp->display) {
lept_rmdir("lept/lines");
lept_mkdir("lept/lines");
lept_stderr("Writing to: /tmp/lept/lines/lineremoval.pdf\n");
pixaConvertToPdf(pixa, 0, 1.0, L_FLATE_ENCODE, 0, "lineremoval example",
"/tmp/lept/lines/lineremoval.pdf");
pix1 = pixaDisplayTiledInColumns(pixa, 5, 0.5, 30, 2);
pixWrite("/tmp/lept/lines/lineremoval.jpg", pix1, IFF_JFIF_JPEG);
pixDisplay(pix1, 100, 100);
pixDestroy(&pix1);
}
pixaDestroy(&pixa);
pixDestroy(&pixs);
pixDestroy(&pix6);
return regTestCleanup(rp);
}
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