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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.
*====================================================================*/
/*
* speckle_reg.c
*
* Image normalization to get an image with speckle background
* noise, followed by attempts to remove some of the speckle.
*/
#ifdef HAVE_CONFIG_H
#include <config_auto.h>
#endif /* HAVE_CONFIG_H */
#include "allheaders.h"
/* HMT (with just misses) for speckle up to 2x2 */
static const char *selstr2 = "oooo"
"oC o"
"o o"
"oooo";
/* HMT (with just misses) for speckle up to 3x3 */
static const char *selstr3 = "ooooo"
"oC o"
"o o"
"o o"
"ooooo";
int main(int argc,
char **argv)
{
PIX *pixs, *pix1, *pix2, *pix3, *pix4, *pix5;
PIX *pix6, *pix7, *pix8, *pix9, *pix10;
PIXA *pixa1;
SEL *sel1, *sel2, *sel3, *sel4;
L_REGPARAMS *rp;
if (regTestSetup(argc, argv, &rp))
return 1;
/* Normalize for rapidly varying background */
pixa1 = pixaCreate(0);
pixs = pixRead("w91frag.jpg");
pixaAddPix(pixa1, pixs, L_INSERT);
regTestWritePixAndCheck(rp, pixs, IFF_JFIF_JPEG); /* 0 */
pix1 = pixBackgroundNormFlex(pixs, 7, 7, 1, 1, 10);
pixaAddPix(pixa1, pix1, L_INSERT);
regTestWritePixAndCheck(rp, pix1, IFF_JFIF_JPEG); /* 1 */
/* Remove the background */
pix2 = pixGammaTRCMasked(NULL, pix1, NULL, 1.0, 100, 175);
regTestWritePixAndCheck(rp, pix2, IFF_JFIF_JPEG); /* 2 */
/* Binarize */
pix3 = pixThresholdToBinary(pix2, 180);
pixaAddPix(pixa1, pix3, L_INSERT);
regTestWritePixAndCheck(rp, pix3, IFF_PNG); /* 3 */
/* Remove the speckle noise up to 2x2 */
sel1 = selCreateFromString(selstr2, 4, 4, "speckle2");
pix4 = pixHMT(NULL, pix3, sel1);
pixaAddPix(pixa1, pix4, L_INSERT);
sel2 = selCreateBrick(2, 2, 0, 0, SEL_HIT);
pix5 = pixDilate(NULL, pix4, sel2);
pixaAddPix(pixa1, pix5, L_INSERT);
regTestWritePixAndCheck(rp, pix5, IFF_PNG); /* 4 */
pix6 = pixSubtract(NULL, pix3, pix5);
pixaAddPix(pixa1, pix6, L_INSERT);
regTestWritePixAndCheck(rp, pix6, IFF_PNG); /* 5 */
/* Remove the speckle noise up to 3x3 */
sel3 = selCreateFromString(selstr3, 5, 5, "speckle3");
pix7 = pixHMT(NULL, pix3, sel3);
pixaAddPix(pixa1, pix7, L_INSERT);
sel4 = selCreateBrick(3, 3, 0, 0, SEL_HIT);
pix8 = pixDilate(NULL, pix7, sel4);
pixaAddPix(pixa1, pix8, L_INSERT);
regTestWritePixAndCheck(rp, pix8, IFF_PNG); /* 6 */
pix9 = pixSubtract(NULL, pix3, pix8);
pixaAddPix(pixa1, pix9, L_INSERT);
regTestWritePixAndCheck(rp, pix9, IFF_PNG); /* 7 */
pix10 = pixaDisplayTiledInColumns(pixa1, 3, 1.0, 30, 2);
pixDisplayWithTitle(pix10, 0, 0, NULL, rp->display);
regTestWritePixAndCheck(rp, pix10, IFF_JFIF_JPEG); /* 8 */
selDestroy(&sel1);
selDestroy(&sel2);
selDestroy(&sel3);
selDestroy(&sel4);
pixDestroy(&pix2);
pixDestroy(&pix10);
pixaDestroy(&pixa1);
return regTestCleanup(rp);
}
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