285 lines
13 KiB
C
285 lines
13 KiB
C
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/*
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*
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* Copyright (C) 1998-2016, OFFIS e.V.
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* All rights reserved. See COPYRIGHT file for details.
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*
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* This software and supporting documentation were developed by
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*
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* OFFIS e.V.
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* R&D Division Health
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* Escherweg 2
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* D-26121 Oldenburg, Germany
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*
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*
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* Module: dcmimage
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*
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* Author: Joerg Riesmeier
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*
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* Purpose: DicomYBRPixelTemplate (Header)
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*
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*/
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#ifndef DIYBRPXT_H
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#define DIYBRPXT_H
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#include "dcmtk/config/osconfig.h"
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#include "dcmtk/dcmimage/dicopxt.h"
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#include "dcmtk/dcmimgle/diinpx.h" /* gcc 3.4 needs this */
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/*---------------------*
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* class declaration *
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*---------------------*/
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/** Template class to handle YCbCr pixel data
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*/
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template<class T1, class T2>
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class DiYBRPixelTemplate
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: public DiColorPixelTemplate<T2>
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{
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public:
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/** constructor
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*
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** @param docu pointer to DICOM document
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* @param pixel pointer to input pixel representation
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* @param status reference to status variable
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* @param planeSize number of pixels in a plane
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* @param bits number of bits per sample
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* @param rgb flag, convert color model to RGB only if true
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*/
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DiYBRPixelTemplate(const DiDocument *docu,
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const DiInputPixel *pixel,
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EI_Status &status,
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const unsigned long planeSize,
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const int bits,
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const OFBool rgb)
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: DiColorPixelTemplate<T2>(docu, pixel, 3, status)
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{
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if ((pixel != NULL) && (this->Count > 0) && (status == EIS_Normal))
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convert(OFstatic_cast(const T1 *, pixel->getData()) + pixel->getPixelStart(), planeSize, bits, rgb);
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}
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/** destructor
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*/
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virtual ~DiYBRPixelTemplate()
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{
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}
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private:
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/** convert input pixel data to intermediate representation
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*
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** @param pixel pointer to input pixel data
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* @param planeSize number of pixels in a plane
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* @param bits number of bits per sample
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* @param rgb flag, convert color model to RGB only if true
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*/
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void convert(const T1 *pixel,
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const unsigned long planeSize,
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const int bits,
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const OFBool rgb)
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{
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if (this->Init(pixel))
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{
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const T1 offset = OFstatic_cast(T1, DicomImageClass::maxval(bits - 1));
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// use the number of input pixels derived from the length of the 'PixelData'
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// attribute), but not more than the size of the intermediate buffer
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const unsigned long count = (this->InputCount < this->Count) ? this->InputCount : this->Count;
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if (rgb) /* convert to RGB model */
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{
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T2 *r = this->Data[0];
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T2 *g = this->Data[1];
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T2 *b = this->Data[2];
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const T2 maxvalue = OFstatic_cast(T2, DicomImageClass::maxval(bits));
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DiPixelRepresentationTemplate<T1> rep;
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if (bits == 8 && !rep.isSigned()) // only for unsigned 8 bit
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{
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Sint16 rcr_tab[256];
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Sint16 gcb_tab[256];
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Sint16 gcr_tab[256];
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Sint16 bcb_tab[256];
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const double r_const = 0.7010 * OFstatic_cast(double, maxvalue);
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const double g_const = 0.5291 * OFstatic_cast(double, maxvalue);
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const double b_const = 0.8859 * OFstatic_cast(double, maxvalue);
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unsigned long l;
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for (l = 0; l < 256; ++l)
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{
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rcr_tab[l] = OFstatic_cast(Sint16, 1.4020 * OFstatic_cast(double, l) - r_const);
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gcb_tab[l] = OFstatic_cast(Sint16, 0.3441 * OFstatic_cast(double, l));
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gcr_tab[l] = OFstatic_cast(Sint16, 0.7141 * OFstatic_cast(double, l) - g_const);
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bcb_tab[l] = OFstatic_cast(Sint16, 1.7720 * OFstatic_cast(double, l) - b_const);
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}
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Sint32 sr;
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Sint32 sg;
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Sint32 sb;
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if (this->PlanarConfiguration)
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{
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/*
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const T1 *y = pixel;
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const T1 *cb = y + this->InputCount;
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const T1 *cr = cb + this->InputCount;
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for (i = count; i != 0; --i, ++y, ++cb, ++cr)
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{
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sr = OFstatic_cast(Sint32, *y) + OFstatic_cast(Sint32, rcr_tab[*cr]);
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sg = OFstatic_cast(Sint32, *y) - OFstatic_cast(Sint32, gcb_tab[*cb]) - OFstatic_cast(Sint32, gcr_tab[*cr]);
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sb = OFstatic_cast(Sint32, *y) + OFstatic_cast(Sint32, bcb_tab[*cb]);
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*(r++) = (sr < 0) ? 0 : (sr > OFstatic_cast(Sint32, maxvalue)) ? maxvalue : OFstatic_cast(T2, sr);
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*(g++) = (sg < 0) ? 0 : (sg > OFstatic_cast(Sint32, maxvalue)) ? maxvalue : OFstatic_cast(T2, sg);
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*(b++) = (sb < 0) ? 0 : (sb > OFstatic_cast(Sint32, maxvalue)) ? maxvalue : OFstatic_cast(T2, sb);
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}
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*/
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const T1 *y = pixel;
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const T1 *cb = y + planeSize;
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const T1 *cr = cb + planeSize;
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unsigned long i = count;
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while (i != 0)
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{
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/* convert a single frame */
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for (l = planeSize; (l != 0) && (i != 0); --l, --i, ++y, ++cb, ++cr)
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{
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sr = OFstatic_cast(Sint32, *y) + OFstatic_cast(Sint32, rcr_tab[OFstatic_cast(Uint32, *cr)]);
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sg = OFstatic_cast(Sint32, *y) - OFstatic_cast(Sint32, gcb_tab[OFstatic_cast(Uint32, *cb)]) - OFstatic_cast(Sint32, gcr_tab[OFstatic_cast(Uint32, *cr)]);
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sb = OFstatic_cast(Sint32, *y) + OFstatic_cast(Sint32, bcb_tab[OFstatic_cast(Uint32, *cb)]);
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*(r++) = (sr < 0) ? 0 : (sr > OFstatic_cast(Sint32, maxvalue)) ? maxvalue : OFstatic_cast(T2, sr);
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*(g++) = (sg < 0) ? 0 : (sg > OFstatic_cast(Sint32, maxvalue)) ? maxvalue : OFstatic_cast(T2, sg);
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*(b++) = (sb < 0) ? 0 : (sb > OFstatic_cast(Sint32, maxvalue)) ? maxvalue : OFstatic_cast(T2, sb);
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}
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/* jump to next frame start (skip 2 planes) */
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y += 2 * planeSize;
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cb += 2 * planeSize;
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cr += 2 * planeSize;
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}
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}
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else
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{
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const T1 *p = pixel;
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T1 y;
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T1 cb;
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T1 cr;
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unsigned long i;
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for (i = count; i != 0; --i)
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{
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y = *(p++);
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cb = *(p++);
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cr = *(p++);
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sr = OFstatic_cast(Sint32, y) + OFstatic_cast(Sint32, rcr_tab[OFstatic_cast(Uint32, cr)]);
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sg = OFstatic_cast(Sint32, y) - OFstatic_cast(Sint32, gcb_tab[OFstatic_cast(Uint32, cb)]) - OFstatic_cast(Sint32, gcr_tab[OFstatic_cast(Uint32, cr)]);
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sb = OFstatic_cast(Sint32, y) + OFstatic_cast(Sint32, bcb_tab[OFstatic_cast(Uint32, cb)]);
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*(r++) = (sr < 0) ? 0 : (sr > OFstatic_cast(Sint32, maxvalue)) ? maxvalue : OFstatic_cast(T2, sr);
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*(g++) = (sg < 0) ? 0 : (sg > OFstatic_cast(Sint32, maxvalue)) ? maxvalue : OFstatic_cast(T2, sg);
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*(b++) = (sb < 0) ? 0 : (sb > OFstatic_cast(Sint32, maxvalue)) ? maxvalue : OFstatic_cast(T2, sb);
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}
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}
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}
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else
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{
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if (this->PlanarConfiguration)
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{
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/*
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const T1 *y = pixel;
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const T1 *cb = y + this->InputCount;
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const T1 *cr = cb + this->InputCount;
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for (i = count; i != 0; --i)
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convertValue(*(r++), *(g++), *(b++), removeSign(*(y++), offset), removeSign(*(cb++), offset),
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removeSign(*(cr++), offset), maxvalue);
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*/
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unsigned long l;
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unsigned long i = count;
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const T1 *y = pixel;
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const T1 *cb = y + planeSize;
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const T1 *cr = cb + planeSize;
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while (i != 0)
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{
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/* convert a single frame */
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for (l = planeSize; (l != 0) && (i != 0); --l, --i)
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{
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convertValue(*(r++), *(g++), *(b++), removeSign(*(y++), offset), removeSign(*(cb++), offset),
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removeSign(*(cr++), offset), maxvalue);
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}
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/* jump to next frame start (skip 2 planes) */
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y += 2 * planeSize;
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cb += 2 * planeSize;
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cr += 2 * planeSize;
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}
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}
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else
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{
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const T1 *p = pixel;
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T2 y;
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T2 cb;
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T2 cr;
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unsigned long i;
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for (i = count; i != 0; --i)
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{
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y = removeSign(*(p++), offset);
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cb = removeSign(*(p++), offset);
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cr = removeSign(*(p++), offset);
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convertValue(*(r++), *(g++), *(b++), y, cb, cr, maxvalue);
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}
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}
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}
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} else { /* retain YCbCr model */
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const T1 *p = pixel;
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if (this->PlanarConfiguration)
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{
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/*
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T2 *q;
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// number of pixels to be skipped (only applicable if 'PixelData' contains more
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// pixels than expected)
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const unsigned long skip = (this->InputCount > this->Count) ? (this->InputCount - this->Count) : 0;
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for (int j = 0; j < 3; ++j)
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{
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q = this->Data[j];
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for (i = count; i != 0; --i)
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*(q++) = removeSign(*(p++), offset);
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// skip to beginning of next plane
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p += skip;
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}
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*/
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unsigned long l;
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unsigned long i = 0;
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while (i < count)
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{
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/* store current pixel index */
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const unsigned long iStart = i;
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for (int j = 0; j < 3; ++j)
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{
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/* convert a single plane */
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for (l = planeSize, i = iStart; (l != 0) && (i < count); --l, ++i)
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this->Data[j][i] = removeSign(*(p++), offset);
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}
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}
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}
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else
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{
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int j;
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unsigned long i;
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for (i = 0; i < count; ++i) /* for all pixel ... */
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for (j = 0; j < 3; ++j)
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this->Data[j][i] = removeSign(*(p++), offset); /* ... copy planes */
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}
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}
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}
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}
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/** convert a single YCbCr value to RGB
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*/
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inline void convertValue(T2 &red, T2 &green, T2 &blue, const T2 y, const T2 cb, const T2 cr, const T2 maxvalue)
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{
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double dr = OFstatic_cast(double, y) + 1.4020 * OFstatic_cast(double, cr) - 0.7010 * OFstatic_cast(double, maxvalue);
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double dg = OFstatic_cast(double, y) - 0.3441 * OFstatic_cast(double, cb) - 0.7141 * OFstatic_cast(double, cr) + 0.5291 * OFstatic_cast(double, maxvalue);
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double db = OFstatic_cast(double, y) + 1.7720 * OFstatic_cast(double, cb) - 0.8859 * OFstatic_cast(double, maxvalue);
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red = (dr < 0.0) ? 0 : (dr > OFstatic_cast(double, maxvalue)) ? maxvalue : OFstatic_cast(T2, dr);
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green = (dg < 0.0) ? 0 : (dg > OFstatic_cast(double, maxvalue)) ? maxvalue : OFstatic_cast(T2, dg);
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blue = (db < 0.0) ? 0 : (db > OFstatic_cast(double, maxvalue)) ? maxvalue : OFstatic_cast(T2, db);
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}
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};
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#endif
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