mirror of http://192.168.1.51:8099/lmh188/twain3.0
126 lines
4.7 KiB
C
126 lines
4.7 KiB
C
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/*====================================================================*
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- Copyright (C) 2001 Leptonica. All rights reserved.
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-
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- Redistribution and use in source and binary forms, with or without
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- modification, are permitted provided that the following conditions
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- are met:
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- 1. Redistributions of source code must retain the above copyright
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- notice, this list of conditions and the following disclaimer.
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- 2. Redistributions in binary form must reproduce the above
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- copyright notice, this list of conditions and the following
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- disclaimer in the documentation and/or other materials
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- provided with the distribution.
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-
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- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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- ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ANY
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- CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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- OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*====================================================================*/
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/*!
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* \file colormorph.c
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* <pre>
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*
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* Top-level color morphological operations
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*
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* PIX *pixColorMorph()
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*
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* Method: Algorithm by van Herk and Gil and Werman, 1992
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* Apply grayscale morphological operations separately
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* to each component.
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* </pre>
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*/
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#include "allheaders.h"
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/*-----------------------------------------------------------------*
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* Top-level color morphological operations *
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*-----------------------------------------------------------------*/
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/*!
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* \brief pixColorMorph()
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*
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* \param[in] pixs
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* \param[in] type L_MORPH_DILATE, L_MORPH_ERODE, L_MORPH_OPEN,
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* or L_MORPH_CLOSE
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* \param[in] hsize width of Sel; must be odd; origin implicitly in center
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* \param[in] vsize ditto for height of Sel
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* \return pixd
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*
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* <pre>
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* Notes:
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* (1) This does the morph operation on each component separately,
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* and recombines the result.
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* (2) Sel is a brick with all elements being hits.
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* (3) If hsize = vsize = 1, just returns a copy.
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* </pre>
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*/
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PIX *
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pixColorMorph(PIX *pixs,
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l_int32 type,
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l_int32 hsize,
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l_int32 vsize)
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{
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PIX *pixr, *pixg, *pixb, *pixrm, *pixgm, *pixbm, *pixd;
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PROCNAME("pixColorMorph");
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if (!pixs)
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return (PIX *)ERROR_PTR("pixs not defined", procName, NULL);
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if (pixGetDepth(pixs) != 32)
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return (PIX *)ERROR_PTR("pixs not 32 bpp", procName, NULL);
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if (type != L_MORPH_DILATE && type != L_MORPH_ERODE &&
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type != L_MORPH_OPEN && type != L_MORPH_CLOSE)
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return (PIX *)ERROR_PTR("invalid morph type", procName, NULL);
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if (hsize < 1 || vsize < 1)
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return (PIX *)ERROR_PTR("hsize or vsize < 1", procName, NULL);
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if ((hsize & 1) == 0 ) {
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L_WARNING("horiz sel size must be odd; increasing by 1\n", procName);
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hsize++;
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}
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if ((vsize & 1) == 0 ) {
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L_WARNING("vert sel size must be odd; increasing by 1\n", procName);
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vsize++;
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}
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if (hsize == 1 && vsize == 1)
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return pixCopy(NULL, pixs);
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pixr = pixGetRGBComponent(pixs, COLOR_RED);
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pixg = pixGetRGBComponent(pixs, COLOR_GREEN);
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pixb = pixGetRGBComponent(pixs, COLOR_BLUE);
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if (type == L_MORPH_DILATE) {
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pixrm = pixDilateGray(pixr, hsize, vsize);
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pixgm = pixDilateGray(pixg, hsize, vsize);
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pixbm = pixDilateGray(pixb, hsize, vsize);
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} else if (type == L_MORPH_ERODE) {
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pixrm = pixErodeGray(pixr, hsize, vsize);
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pixgm = pixErodeGray(pixg, hsize, vsize);
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pixbm = pixErodeGray(pixb, hsize, vsize);
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} else if (type == L_MORPH_OPEN) {
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pixrm = pixOpenGray(pixr, hsize, vsize);
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pixgm = pixOpenGray(pixg, hsize, vsize);
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pixbm = pixOpenGray(pixb, hsize, vsize);
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} else { /* type == L_MORPH_CLOSE */
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pixrm = pixCloseGray(pixr, hsize, vsize);
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pixgm = pixCloseGray(pixg, hsize, vsize);
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pixbm = pixCloseGray(pixb, hsize, vsize);
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}
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pixd = pixCreateRGBImage(pixrm, pixgm, pixbm);
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pixDestroy(&pixr);
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pixDestroy(&pixrm);
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pixDestroy(&pixg);
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pixDestroy(&pixgm);
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pixDestroy(&pixb);
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pixDestroy(&pixbm);
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return pixd;
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}
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