diff options
Diffstat (limited to 'leptonica/prog/speckle_reg.c')
| -rw-r--r-- | leptonica/prog/speckle_reg.c | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/leptonica/prog/speckle_reg.c b/leptonica/prog/speckle_reg.c new file mode 100644 index 00000000..00e58667 --- /dev/null +++ b/leptonica/prog/speckle_reg.c @@ -0,0 +1,119 @@ +/*====================================================================* + - 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); +} + + |