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Open Source Computer Vision Library
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291 lines
8.1 KiB
291 lines
8.1 KiB
/* |
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* Copyright (c) 1999-2000 Image Power, Inc. and the University of |
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* British Columbia. |
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* Copyright (c) 2001-2003 Michael David Adams. |
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* All rights reserved. |
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*/ |
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/* __START_OF_JASPER_LICENSE__ |
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* |
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* JasPer License Version 2.0 |
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* |
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* Copyright (c) 2001-2006 Michael David Adams |
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* Copyright (c) 1999-2000 Image Power, Inc. |
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* Copyright (c) 1999-2000 The University of British Columbia |
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* |
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* All rights reserved. |
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* |
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* Permission is hereby granted, free of charge, to any person (the |
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* "User") obtaining a copy of this software and associated documentation |
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* files (the "Software"), to deal in the Software without restriction, |
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* including without limitation the rights to use, copy, modify, merge, |
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* publish, distribute, and/or sell copies of the Software, and to permit |
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* persons to whom the Software is furnished to do so, subject to the |
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* following conditions: |
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* |
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* 1. The above copyright notices and this permission notice (which |
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* includes the disclaimer below) shall be included in all copies or |
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* substantial portions of the Software. |
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* |
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* 2. The name of a copyright holder shall not be used to endorse or |
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* promote products derived from the Software without specific prior |
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* written permission. |
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* |
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* THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS |
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* LICENSE. NO USE OF THE SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER |
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* THIS DISCLAIMER. THE SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS |
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* "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING |
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* BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A |
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* PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. IN NO |
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* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL |
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* INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING |
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* FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, |
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* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION |
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* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. NO ASSURANCES ARE |
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* PROVIDED BY THE COPYRIGHT HOLDERS THAT THE SOFTWARE DOES NOT INFRINGE |
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* THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY. |
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* EACH COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY TO THE USER FOR CLAIMS |
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* BROUGHT BY ANY OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL |
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* PROPERTY RIGHTS OR OTHERWISE. AS A CONDITION TO EXERCISING THE RIGHTS |
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* GRANTED HEREUNDER, EACH USER HEREBY ASSUMES SOLE RESPONSIBILITY TO SECURE |
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* ANY OTHER INTELLECTUAL PROPERTY RIGHTS NEEDED, IF ANY. THE SOFTWARE |
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* IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL |
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* SYSTEMS, SUCH AS THOSE USED IN THE OPERATION OF NUCLEAR FACILITIES, |
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* AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL |
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* SYSTEMS, DIRECT LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH |
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* THE FAILURE OF THE SOFTWARE OR SYSTEM COULD LEAD DIRECTLY TO DEATH, |
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* PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH |
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* RISK ACTIVITIES"). THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIM ANY |
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* EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES. |
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* |
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* __END_OF_JASPER_LICENSE__ |
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*/ |
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/* |
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* Multicomponent Transform Code |
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* |
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* $Id: jpc_mct.c,v 1.2 2008-05-26 09:40:52 vp153 Exp $ |
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*/ |
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/******************************************************************************\ |
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* Includes. |
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\******************************************************************************/ |
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#include <assert.h> |
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#include "jasper/jas_seq.h" |
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#include "jpc_fix.h" |
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#include "jpc_mct.h" |
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/******************************************************************************\ |
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* Code. |
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\******************************************************************************/ |
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/* Compute the forward RCT. */ |
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void jpc_rct(jas_matrix_t *c0, jas_matrix_t *c1, jas_matrix_t *c2) |
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{ |
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int numrows; |
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int numcols; |
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int i; |
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int j; |
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jpc_fix_t *c0p; |
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jpc_fix_t *c1p; |
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jpc_fix_t *c2p; |
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numrows = jas_matrix_numrows(c0); |
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numcols = jas_matrix_numcols(c0); |
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/* All three matrices must have the same dimensions. */ |
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assert(jas_matrix_numrows(c1) == numrows && jas_matrix_numcols(c1) == numcols |
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&& jas_matrix_numrows(c2) == numrows && jas_matrix_numcols(c2) == numcols); |
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for (i = 0; i < numrows; i++) { |
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c0p = jas_matrix_getref(c0, i, 0); |
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c1p = jas_matrix_getref(c1, i, 0); |
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c2p = jas_matrix_getref(c2, i, 0); |
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for (j = numcols; j > 0; --j) { |
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int r; |
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int g; |
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int b; |
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int y; |
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int u; |
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int v; |
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r = *c0p; |
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g = *c1p; |
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b = *c2p; |
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y = (r + (g << 1) + b) >> 2; |
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u = b - g; |
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v = r - g; |
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*c0p++ = y; |
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*c1p++ = u; |
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*c2p++ = v; |
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} |
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} |
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} |
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/* Compute the inverse RCT. */ |
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void jpc_irct(jas_matrix_t *c0, jas_matrix_t *c1, jas_matrix_t *c2) |
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{ |
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int numrows; |
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int numcols; |
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int i; |
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int j; |
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jpc_fix_t *c0p; |
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jpc_fix_t *c1p; |
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jpc_fix_t *c2p; |
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numrows = jas_matrix_numrows(c0); |
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numcols = jas_matrix_numcols(c0); |
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/* All three matrices must have the same dimensions. */ |
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assert(jas_matrix_numrows(c1) == numrows && jas_matrix_numcols(c1) == numcols |
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&& jas_matrix_numrows(c2) == numrows && jas_matrix_numcols(c2) == numcols); |
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for (i = 0; i < numrows; i++) { |
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c0p = jas_matrix_getref(c0, i, 0); |
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c1p = jas_matrix_getref(c1, i, 0); |
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c2p = jas_matrix_getref(c2, i, 0); |
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for (j = numcols; j > 0; --j) { |
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int r; |
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int g; |
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int b; |
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int y; |
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int u; |
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int v; |
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y = *c0p; |
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u = *c1p; |
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v = *c2p; |
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g = y - ((u + v) >> 2); |
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r = v + g; |
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b = u + g; |
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*c0p++ = r; |
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*c1p++ = g; |
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*c2p++ = b; |
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} |
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} |
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} |
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void jpc_ict(jas_matrix_t *c0, jas_matrix_t *c1, jas_matrix_t *c2) |
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{ |
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int numrows; |
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int numcols; |
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int i; |
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int j; |
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jpc_fix_t r; |
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jpc_fix_t g; |
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jpc_fix_t b; |
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jpc_fix_t y; |
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jpc_fix_t u; |
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jpc_fix_t v; |
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jpc_fix_t *c0p; |
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jpc_fix_t *c1p; |
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jpc_fix_t *c2p; |
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numrows = jas_matrix_numrows(c0); |
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assert(jas_matrix_numrows(c1) == numrows && jas_matrix_numrows(c2) == numrows); |
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numcols = jas_matrix_numcols(c0); |
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assert(jas_matrix_numcols(c1) == numcols && jas_matrix_numcols(c2) == numcols); |
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for (i = 0; i < numrows; ++i) { |
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c0p = jas_matrix_getref(c0, i, 0); |
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c1p = jas_matrix_getref(c1, i, 0); |
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c2p = jas_matrix_getref(c2, i, 0); |
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for (j = numcols; j > 0; --j) { |
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r = *c0p; |
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g = *c1p; |
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b = *c2p; |
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y = jpc_fix_add3(jpc_fix_mul(jpc_dbltofix(0.299), r), jpc_fix_mul(jpc_dbltofix(0.587), g), |
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jpc_fix_mul(jpc_dbltofix(0.114), b)); |
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u = jpc_fix_add3(jpc_fix_mul(jpc_dbltofix(-0.16875), r), jpc_fix_mul(jpc_dbltofix(-0.33126), g), |
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jpc_fix_mul(jpc_dbltofix(0.5), b)); |
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v = jpc_fix_add3(jpc_fix_mul(jpc_dbltofix(0.5), r), jpc_fix_mul(jpc_dbltofix(-0.41869), g), |
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jpc_fix_mul(jpc_dbltofix(-0.08131), b)); |
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*c0p++ = y; |
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*c1p++ = u; |
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*c2p++ = v; |
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} |
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} |
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} |
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void jpc_iict(jas_matrix_t *c0, jas_matrix_t *c1, jas_matrix_t *c2) |
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{ |
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int numrows; |
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int numcols; |
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int i; |
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int j; |
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jpc_fix_t r; |
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jpc_fix_t g; |
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jpc_fix_t b; |
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jpc_fix_t y; |
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jpc_fix_t u; |
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jpc_fix_t v; |
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jpc_fix_t *c0p; |
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jpc_fix_t *c1p; |
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jpc_fix_t *c2p; |
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numrows = jas_matrix_numrows(c0); |
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assert(jas_matrix_numrows(c1) == numrows && jas_matrix_numrows(c2) == numrows); |
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numcols = jas_matrix_numcols(c0); |
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assert(jas_matrix_numcols(c1) == numcols && jas_matrix_numcols(c2) == numcols); |
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for (i = 0; i < numrows; ++i) { |
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c0p = jas_matrix_getref(c0, i, 0); |
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c1p = jas_matrix_getref(c1, i, 0); |
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c2p = jas_matrix_getref(c2, i, 0); |
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for (j = numcols; j > 0; --j) { |
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y = *c0p; |
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u = *c1p; |
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v = *c2p; |
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r = jpc_fix_add(y, jpc_fix_mul(jpc_dbltofix(1.402), v)); |
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g = jpc_fix_add3(y, jpc_fix_mul(jpc_dbltofix(-0.34413), u), |
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jpc_fix_mul(jpc_dbltofix(-0.71414), v)); |
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b = jpc_fix_add(y, jpc_fix_mul(jpc_dbltofix(1.772), u)); |
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*c0p++ = r; |
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*c1p++ = g; |
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*c2p++ = b; |
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} |
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} |
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} |
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jpc_fix_t jpc_mct_getsynweight(int mctid, int cmptno) |
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{ |
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jpc_fix_t synweight; |
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synweight = JPC_FIX_ONE; |
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switch (mctid) { |
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case JPC_MCT_RCT: |
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switch (cmptno) { |
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case 0: |
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synweight = jpc_dbltofix(sqrt(3.0)); |
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break; |
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case 1: |
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synweight = jpc_dbltofix(sqrt(0.6875)); |
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break; |
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case 2: |
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synweight = jpc_dbltofix(sqrt(0.6875)); |
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break; |
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} |
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break; |
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case JPC_MCT_ICT: |
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switch (cmptno) { |
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case 0: |
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synweight = jpc_dbltofix(sqrt(3.0000)); |
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break; |
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case 1: |
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synweight = jpc_dbltofix(sqrt(3.2584)); |
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break; |
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case 2: |
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synweight = jpc_dbltofix(sqrt(2.4755)); |
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break; |
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} |
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break; |
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#if 0 |
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default: |
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synweight = JPC_FIX_ONE; |
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break; |
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#endif |
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} |
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return synweight; |
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}
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