/*====================================================================* - 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. *====================================================================*/ /*! * \file colormorph.c *
* * Top-level color morphological operations * * PIX *pixColorMorph() * * Method: Algorithm by van Herk and Gil and Werman, 1992 * Apply grayscale morphological operations separately * to each component. **/ #ifdef HAVE_CONFIG_H #include
* Notes: * (1) This does the morph operation on each component separately, * and recombines the result. * (2) Sel is a brick with all elements being hits. * (3) If hsize = vsize = 1, just returns a copy. **/ PIX * pixColorMorph(PIX *pixs, l_int32 type, l_int32 hsize, l_int32 vsize) { PIX *pixr, *pixg, *pixb, *pixrm, *pixgm, *pixbm, *pixd; PROCNAME("pixColorMorph"); if (!pixs) return (PIX *)ERROR_PTR("pixs not defined", procName, NULL); if (pixGetDepth(pixs) != 32) return (PIX *)ERROR_PTR("pixs not 32 bpp", procName, NULL); if (type != L_MORPH_DILATE && type != L_MORPH_ERODE && type != L_MORPH_OPEN && type != L_MORPH_CLOSE) return (PIX *)ERROR_PTR("invalid morph type", procName, NULL); if (hsize < 1 || vsize < 1) return (PIX *)ERROR_PTR("hsize or vsize < 1", procName, NULL); if ((hsize & 1) == 0 ) { L_WARNING("horiz sel size must be odd; increasing by 1\n", procName); hsize++; } if ((vsize & 1) == 0 ) { L_WARNING("vert sel size must be odd; increasing by 1\n", procName); vsize++; } if (hsize == 1 && vsize == 1) return pixCopy(NULL, pixs); pixr = pixGetRGBComponent(pixs, COLOR_RED); pixg = pixGetRGBComponent(pixs, COLOR_GREEN); pixb = pixGetRGBComponent(pixs, COLOR_BLUE); if (type == L_MORPH_DILATE) { pixrm = pixDilateGray(pixr, hsize, vsize); pixgm = pixDilateGray(pixg, hsize, vsize); pixbm = pixDilateGray(pixb, hsize, vsize); } else if (type == L_MORPH_ERODE) { pixrm = pixErodeGray(pixr, hsize, vsize); pixgm = pixErodeGray(pixg, hsize, vsize); pixbm = pixErodeGray(pixb, hsize, vsize); } else if (type == L_MORPH_OPEN) { pixrm = pixOpenGray(pixr, hsize, vsize); pixgm = pixOpenGray(pixg, hsize, vsize); pixbm = pixOpenGray(pixb, hsize, vsize); } else { /* type == L_MORPH_CLOSE */ pixrm = pixCloseGray(pixr, hsize, vsize); pixgm = pixCloseGray(pixg, hsize, vsize); pixbm = pixCloseGray(pixb, hsize, vsize); } pixd = pixCreateRGBImage(pixrm, pixgm, pixbm); pixDestroy(&pixr); pixDestroy(&pixrm); pixDestroy(&pixg); pixDestroy(&pixgm); pixDestroy(&pixb); pixDestroy(&pixbm); return pixd; }