/usr/include/dcmtk/dcmimgle/dimoipxt.h is in libdcmtk-dev 3.6.1~20160216-4.
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*
* Copyright (C) 1996-2011, OFFIS e.V.
* All rights reserved. See COPYRIGHT file for details.
*
* This software and supporting documentation were developed by
*
* OFFIS e.V.
* R&D Division Health
* Escherweg 2
* D-26121 Oldenburg, Germany
*
*
* Module: dcmimgle
*
* Author: Joerg Riesmeier
*
* Purpose: DicomMonochromeInputPixelTemplate (Header)
*
*/
#ifndef DIMOIPXT_H
#define DIMOIPXT_H
#include "dcmtk/config/osconfig.h"
#include "dcmtk/ofstd/ofbmanip.h"
#include "dcmtk/ofstd/ofcast.h"
#include "dcmtk/dcmimgle/dimopxt.h"
#include "dcmtk/dcmimgle/diinpx.h"
/*---------------------*
* class declaration *
*---------------------*/
/** Template class to convert monochrome pixel data to intermediate representation
*/
template<class T1, class T2, class T3>
class DiMonoInputPixelTemplate
: public DiMonoPixelTemplate<T3>
{
public:
/** constructor
*
** @param pixel pointer to input pixel representation
* @param modality pointer to modality transform object
*/
DiMonoInputPixelTemplate(DiInputPixel *pixel,
DiMonoModality *modality)
: DiMonoPixelTemplate<T3>(pixel, modality)
{
/* erase empty part of the buffer (= blacken the background) */
if ((this->Data != NULL) && (this->InputCount < this->Count))
OFBitmanipTemplate<T3>::zeroMem(this->Data + this->InputCount, this->Count - this->InputCount);
if ((pixel != NULL) && (this->Count > 0))
{
// check whether to apply any modality transform
if ((this->Modality != NULL) && this->Modality->hasLookupTable() && (bitsof(T1) <= MAX_TABLE_ENTRY_SIZE))
{
modlut(pixel);
// ignore modality LUT min/max values since the image does not necessarily have to use all LUT entries
this->determineMinMax();
}
else if ((this->Modality != NULL) && this->Modality->hasRescaling())
{
rescale(pixel, this->Modality->getRescaleSlope(), this->Modality->getRescaleIntercept());
this->determineMinMax(OFstatic_cast(T3, this->Modality->getMinValue()), OFstatic_cast(T3, this->Modality->getMaxValue()));
} else {
rescale(pixel); // "copy" or reference pixel data
this->determineMinMax(OFstatic_cast(T3, this->Modality->getMinValue()), OFstatic_cast(T3, this->Modality->getMaxValue()));
}
}
}
/** destructor
*/
virtual ~DiMonoInputPixelTemplate()
{
}
private:
/** initialize optimization LUT
*
** @param lut reference to storage area for lookup table
* @param ocnt number of LUT entries (will be check as optimization criteria)
*
** @return status, true if successful (LUT has been created), false otherwise
*/
inline int initOptimizationLUT(T3 *&lut,
const unsigned long ocnt)
{
int result = 0;
if ((sizeof(T1) <= 2) && (this->InputCount > 3 * ocnt)) // optimization criteria
{ // use LUT for optimization
lut = new T3[ocnt];
if (lut != NULL)
{
DCMIMGLE_DEBUG("using optimized routine with additional LUT");
result = 1;
}
}
return result;
}
/** perform modality LUT transform
*
** @param input pointer to input pixel representation
*/
void modlut(DiInputPixel *input)
{
const T1 *pixel = OFstatic_cast(const T1 *, input->getData());
if ((pixel != NULL) && (this->Modality != NULL))
{
const DiLookupTable *mlut = this->Modality->getTableData();
if (mlut != NULL)
{
const int useInputBuffer = (sizeof(T1) == sizeof(T3)) && (this->Count <= input->getCount());
if (useInputBuffer) // do not copy pixel data, reference them!
{
DCMIMGLE_DEBUG("re-using input buffer, do not copy pixel data");
this->Data = OFstatic_cast(T3 *, input->getDataPtr());
input->removeDataReference(); // avoid double deletion
} else
this->Data = new T3[this->Count];
if (this->Data != NULL)
{
DCMIMGLE_DEBUG("applying modality tranformation with LUT (" << mlut->getCount() << " entries)");
register T2 value = 0;
const T2 firstentry = mlut->getFirstEntry(value); // choose signed/unsigned method
const T2 lastentry = mlut->getLastEntry(value);
const T3 firstvalue = OFstatic_cast(T3, mlut->getFirstValue());
const T3 lastvalue = OFstatic_cast(T3, mlut->getLastValue());
register const T1 *p = pixel + input->getPixelStart();
register T3 *q = this->Data;
register unsigned long i;
T3 *lut = NULL;
const unsigned long ocnt = OFstatic_cast(unsigned long, input->getAbsMaxRange()); // number of LUT entries
if (initOptimizationLUT(lut, ocnt))
{ // use LUT for optimization
const T2 absmin = OFstatic_cast(T2, input->getAbsMinimum());
q = lut;
for (i = 0; i < ocnt; ++i) // calculating LUT entries
{
value = OFstatic_cast(T2, i) + absmin;
if (value <= firstentry)
*(q++) = firstvalue;
else if (value >= lastentry)
*(q++) = lastvalue;
else
*(q++) = OFstatic_cast(T3, mlut->getValue(value));
}
const T3 *lut0 = lut - OFstatic_cast(T2, absmin); // points to 'zero' entry
q = this->Data;
for (i = this->InputCount; i != 0; --i) // apply LUT
*(q++) = *(lut0 + (*(p++)));
}
if (lut == NULL) // use "normal" transformation
{
for (i = this->InputCount; i != 0; --i)
{
value = OFstatic_cast(T2, *(p++));
if (value <= firstentry)
*(q++) = firstvalue;
else if (value >= lastentry)
*(q++) = lastvalue;
else
*(q++) = OFstatic_cast(T3, mlut->getValue(value));
}
}
delete[] lut;
}
}
}
}
/** perform rescale slope/intercept transform
*
** @param input pointer to input pixel representation
* @param slope rescale slope value (optional)
* @param intercept rescale intercept value (optional)
*/
void rescale(DiInputPixel *input,
const double slope = 1.0,
const double intercept = 0.0)
{
const T1 *pixel = OFstatic_cast(const T1 *, input->getData());
if (pixel != NULL)
{
const int useInputBuffer = (sizeof(T1) == sizeof(T3)) && (this->Count <= input->getCount()) && (input->getPixelStart() == 0);
if (useInputBuffer)
{ // do not copy pixel data, reference them!
DCMIMGLE_DEBUG("re-using input buffer, do not copy pixel data");
this->Data = OFstatic_cast(T3 *, input->getDataPtr());
input->removeDataReference(); // avoid double deletion
} else
this->Data = new T3[this->Count];
if (this->Data != NULL)
{
register T3 *q = this->Data;
register unsigned long i;
if ((slope == 1.0) && (intercept == 0.0))
{
if (!useInputBuffer)
{
register const T1 *p = pixel + input->getPixelStart();
for (i = this->InputCount; i != 0; --i) // copy pixel data: can't use copyMem because T1 isn't always equal to T3
*(q++) = OFstatic_cast(T3, *(p++));
}
} else {
DCMIMGLE_DEBUG("applying modality transformation with rescale slope = " << slope << ", intercept = " << intercept);
T3 *lut = NULL;
register const T1 *p = pixel + input->getPixelStart();
const unsigned long ocnt = OFstatic_cast(unsigned long, input->getAbsMaxRange()); // number of LUT entries
if (initOptimizationLUT(lut, ocnt))
{ // use LUT for optimization
const double absmin = input->getAbsMinimum();
q = lut;
if (slope == 1.0)
{
for (i = 0; i < ocnt; ++i) // calculating LUT entries
*(q++) = OFstatic_cast(T3, OFstatic_cast(double, i) + absmin + intercept);
} else {
if (intercept == 0.0)
{
for (i = 0; i < ocnt; ++i)
*(q++) = OFstatic_cast(T3, (OFstatic_cast(double, i) + absmin) * slope);
} else {
for (i = 0; i < ocnt; ++i)
*(q++) = OFstatic_cast(T3, (OFstatic_cast(double, i) + absmin) * slope + intercept);
}
}
const T3 *lut0 = lut - OFstatic_cast(T2, absmin); // points to 'zero' entry
q = this->Data;
for (i = this->InputCount; i != 0; --i) // apply LUT
*(q++) = *(lut0 + (*(p++)));
}
if (lut == NULL) // use "normal" transformation
{
if (slope == 1.0)
{
for (i = this->InputCount; i != 0; --i)
*(q++) = OFstatic_cast(T3, OFstatic_cast(double, *(p++)) + intercept);
} else {
if (intercept == 0.0)
{
for (i = this->InputCount; i != 0; --i)
*(q++) = OFstatic_cast(T3, OFstatic_cast(double, *(p++)) * slope);
} else {
for (i = this->InputCount; i != 0; --i)
*(q++) = OFstatic_cast(T3, OFstatic_cast(double, *(p++)) * slope + intercept);
}
}
}
delete[] lut;
}
}
}
}
};
#endif
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