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ossimEdgeFilter.cpp
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//*******************************************************************
// Copyright (C) 2000 ImageLinks Inc.
//
// License: LGPL
//
// See LICENSE.txt file in the top level directory for more details.
//
// Author: Garrett Potts
//
//*******************************************************************
// $Id: ossimEdgeFilter.cpp 19956 2011-08-16 00:36:25Z gpotts $
#include <ossim/imaging/ossimEdgeFilter.h>
#include <ossim/imaging/ossimImageDataFactory.h>
#include <ossim/imaging/ossimImageData.h>
#include <ossim/base/ossimStringProperty.h>
RTTI_DEF1(ossimEdgeFilter, "ossimEdgeFilter", ossimImageSourceFilter);
#define PROP_EDGE_FILTER "Edge type"
using namespace std;
ossimEdgeFilter::ossimEdgeFilter(ossimObject* owner)
:ossimImageSourceFilter(owner),
theTile(NULL),
theFilterType("Sobel")
{
}
ossimEdgeFilter::ossimEdgeFilter(ossimImageSource* inputSource)
:ossimImageSourceFilter(inputSource),
theTile(NULL),
theFilterType("Sobel")
{
}
ossimEdgeFilter::ossimEdgeFilter(ossimObject* owner,
ossimImageSource* inputSource)
:ossimImageSourceFilter(owner, inputSource),
theTile(NULL),
theFilterType("Sobel")
{
}
ossimRefPtr<ossimImageData> ossimEdgeFilter::getTile(const ossimIrect& rect,
ossim_uint32 resLevel)
{
if(!isSourceEnabled())
{
return ossimImageSourceFilter::getTile(rect, resLevel);
}
// expand the rect out to cver the 3x3 horizontal and vertical
// kernel.
//
ossimIrect requestRect = rect;
adjustRequestRect(requestRect);
ossimRefPtr<ossimImageData> inputData =
ossimImageSourceFilter::getTile(requestRect, resLevel);
if(!inputData.valid() || (!inputData->getBuf()))
{
return inputData;
}
if(!theTile.valid()) initialize();
if(!theTile.valid()) return theTile;
theTile->setImageRectangleAndBands(rect, inputData->getNumberOfBands());
switch(theTile->getScalarType())
{
case OSSIM_UCHAR:
{
runFilter((ossim_uint8)0,
inputData);
break;
}
case OSSIM_FLOAT:
case OSSIM_NORMALIZED_FLOAT:
{
runFilter((ossim_float32)0,
inputData);
break;
}
case OSSIM_USHORT16:
case OSSIM_USHORT11:
case OSSIM_USHORT12:
case OSSIM_USHORT13:
case OSSIM_USHORT14:
case OSSIM_USHORT15:
{
runFilter((ossim_uint16)0,
inputData);
break;
}
case OSSIM_SSHORT16:
{
runFilter((ossim_sint16)0,
inputData);
break;
}
case OSSIM_DOUBLE:
case OSSIM_NORMALIZED_DOUBLE:
{
runFilter((ossim_float64)0,
inputData);
break;
}
default:
{
ossimNotify(ossimNotifyLevel_WARN) << "ossimEdgeFilter::getTile WARN: Scalar type = " << theTile->getScalarType()
<< " Not supported by ossimEdgeFilter" << std::endl;
break;
}
}
return theTile;
}
void ossimEdgeFilter::initialize()
{
ossimImageSourceFilter::initialize();
theTile = NULL;
if(!isSourceEnabled())
{
return;
}
theTile = ossimImageDataFactory::instance()->create(this, this);
if(theTile.valid())
{
theTile->initialize();
}
}
void ossimEdgeFilter::getFilterTypeNames(
std::vector<ossimString>& filterNames)const
{
filterNames.push_back("Laplacian");
filterNames.push_back("Prewitt");
filterNames.push_back("Roberts");
filterNames.push_back("Simple");
filterNames.push_back("Sobel");
filterNames.push_back("LocalMax8");
}
ossimString ossimEdgeFilter::getFilterType()const
{
return theFilterType;
}
void ossimEdgeFilter::setFilterType(const ossimString& filterType)
{
ossimString tempFilterType = filterType;
tempFilterType = tempFilterType.downcase();
if(tempFilterType.contains("sob"))
{
theFilterType = "Sobel";
}
else if(tempFilterType.contains("lap"))
{
theFilterType = "Laplacian";
}
else if(tempFilterType.contains("prew"))
{
theFilterType = "Prewitt";
}
else if(tempFilterType.contains("rob"))
{
theFilterType = "Roberts";
}
else if(tempFilterType.contains("sim"))
{
theFilterType = "Simple";
}
else if(tempFilterType.contains("localmax"))
{
theFilterType = "LocalMax8";
}
else
{
theFilterType = "Sobel";
}
}
void ossimEdgeFilter::setProperty(ossimRefPtr<ossimProperty> property)
{
if(!property) return;
if(property->getName() == PROP_EDGE_FILTER)
{
theFilterType = property->valueToString();
}
else
{
ossimImageSourceFilter::setProperty(property.get());
}
}
ossimRefPtr<ossimProperty> ossimEdgeFilter::getProperty(const ossimString& name)const
{
if(name == PROP_EDGE_FILTER)
{
std::vector<ossimString> filterNames;
getFilterTypeNames(filterNames);
ossimStringProperty* stringProp = new ossimStringProperty(PROP_EDGE_FILTER,
theFilterType,
false,
filterNames);
stringProp->clearChangeType();
stringProp->setReadOnlyFlag(false);
stringProp->setCacheRefreshBit();
return stringProp;
}
return ossimImageSourceFilter::getProperty(name);
}
void ossimEdgeFilter::getPropertyNames(std::vector<ossimString>& propertyNames)const
{
ossimImageSourceFilter::getPropertyNames(propertyNames);
propertyNames.push_back(PROP_EDGE_FILTER);
}
void ossimEdgeFilter::adjustRequestRect(ossimIrect& requestRect)const
{
ossimString filterType = theFilterType;
filterType = filterType.downcase();
ossimIrect rect = requestRect;
if(filterType.contains("sob")||
filterType.contains("lap")||
filterType.contains("pre")||
filterType.contains("localmax"))
{
requestRect = ossimIrect(rect.ul().x - 1,
rect.ul().y - 1,
rect.lr().x + 1,
rect.lr().y + 1);
}
else if (filterType.contains("rob") || filterType.contains("sim"))
{
requestRect = ossimIrect(rect.ul().x,
rect.ul().y,
rect.lr().x + 1,
rect.lr().y + 1);
}
else
{
requestRect = ossimIrect(rect.ul().x - 1,
rect.ul().y - 1,
rect.lr().x + 1,
rect.lr().y + 1);
}
}
template <class T>
void ossimEdgeFilter::runFilter(T dummyVariable,
ossimRefPtr<ossimImageData> inputData)
{
ossimString filterType = theFilterType;
filterType = filterType.downcase();
if(filterType.contains("sobel"))
{
runSobelFilter(dummyVariable, inputData);
}
else if(filterType.contains("lap"))
{
runLaplacianFilter(dummyVariable, inputData);
}
else if(filterType.contains("pre"))
{
runPrewittFilter(dummyVariable, inputData);
}
else if(filterType.contains("rob"))
{
runRobertsFilter(dummyVariable, inputData);
}
else if(filterType.contains("sim"))
{
runSimpleFilter(dummyVariable, inputData);
}
else if(filterType.contains("localmax"))
{
runLocalMax8Filter(dummyVariable, inputData);
}
else
{
theTile->makeBlank();
}
}
template <class T>
void ossimEdgeFilter::runSobelFilter(T /* dummyVariable */,
ossimRefPtr<ossimImageData> inputData)
{
ossim_uint32 bandIdx = 0;
ossim_uint32 numberOfBands = inputData->getNumberOfBands();
double horizontalValue = 0.0;
double verticalValue = 0.0;
double value = 0.0;
// ossim_uint32 valueIdx = 0;
ossim_uint32 x = 0;
ossim_uint32 y = 0;
ossim_uint32 width = theTile->getWidth();
ossim_uint32 height = theTile->getHeight();
ossim_int32 rowIncrement = inputData->getWidth();
ossim_int32 rowIncrement2 = 2*inputData->getWidth();
for(bandIdx = 0; bandIdx < numberOfBands; ++bandIdx)
{
T* inputBuf = static_cast<T*>(inputData->getBuf(bandIdx));
T* outputBuf = static_cast<T*>(theTile->getBuf(bandIdx));
T np = static_cast<T>(inputData->getNullPix(bandIdx));
T minP = static_cast<T>(inputData->getMinPix(bandIdx));
T maxP = static_cast<T>(inputData->getMaxPix(bandIdx));
if(inputBuf&&outputBuf)
{
for(y = 0; y < height; ++y)
{
for(x = 0; x < width; ++x)
{
if( (*(inputBuf + rowIncrement + 1) != np))
{
horizontalValue = ((double)inputBuf[0] - (double)inputBuf[rowIncrement2]) +
((double)(inputBuf[1]*2.0) - (double)( inputBuf[rowIncrement2+1]*2.0)) +
((double)(inputBuf[2]) - (double)(inputBuf[rowIncrement2+2]));
verticalValue = ((double)(inputBuf[2]) + (double)inputBuf[rowIncrement+2]*2.0 + (double)inputBuf[rowIncrement2+2]) -
(double)(inputBuf[0] + 2.0*(double)inputBuf[rowIncrement] + (double)inputBuf[rowIncrement2]);
value = sqrt(horizontalValue*horizontalValue + verticalValue*verticalValue);
if((value == np) ||
(value < minP))
{
*outputBuf = (static_cast<T>(minP));
}
else if(value > maxP)
{
*outputBuf = (static_cast<T>(maxP));
}
else
{
*outputBuf = (static_cast<T>(value));
}
}
else
{
*outputBuf = np;
}
++outputBuf;
++inputBuf;
}
inputBuf+=2;
}
}
}
theTile->validate();
}
template <class T>
void ossimEdgeFilter::runPrewittFilter(T /* dummyVariable */,
ossimRefPtr<ossimImageData> inputData)
{
ossim_uint32 bandIdx = 0;
ossim_uint32 numberOfBands = inputData->getNumberOfBands();
double horizontalValue = 0.0;
double verticalValue = 0.0;
double value = 0.0;
// ossim_uint32 valueIdx = 0;
ossim_uint32 x = 0;
ossim_uint32 y = 0;
ossim_uint32 width = theTile->getWidth();
ossim_uint32 height = theTile->getHeight();
ossim_int32 rowIncrement = inputData->getWidth();
ossim_int32 rowIncrement2 = 2*inputData->getWidth();
for(bandIdx = 0; bandIdx < numberOfBands; ++bandIdx)
{
T* inputBuf = static_cast<T*>(inputData->getBuf(bandIdx));
T* outputBuf = static_cast<T*>(theTile->getBuf(bandIdx));
T np = static_cast<T>(inputData->getNullPix(bandIdx));
T minP = static_cast<T>(inputData->getMinPix(bandIdx));
T maxP = static_cast<T>(inputData->getMaxPix(bandIdx));
if(inputBuf&&outputBuf)
{
for(y = 0; y < height; ++y)
{
for(x = 0; x < width; ++x)
{
if( (*(inputBuf + rowIncrement + 1) != np))
{
horizontalValue = ((double)inputBuf[0] - (double)inputBuf[rowIncrement2]) +
((double)(inputBuf[1]) - (double)( inputBuf[rowIncrement2+1])) +
((double)(inputBuf[2]) - (double)(inputBuf[rowIncrement2+2]));
verticalValue = ((double)(inputBuf[2]) + (double)inputBuf[rowIncrement+2] + (double)inputBuf[rowIncrement2+2]) -
((double)inputBuf[0] + (double)inputBuf[rowIncrement] + (double)inputBuf[rowIncrement2]);
value = sqrt(horizontalValue*horizontalValue + verticalValue*verticalValue);
if((value == np) ||
(value < minP))
{
*outputBuf = (static_cast<T>(minP));
}
else if(value > maxP)
{
*outputBuf = (static_cast<T>(maxP));
}
else
{
*outputBuf = (static_cast<T>(value));
}
}
else
{
*outputBuf = np;
}
++outputBuf;
++inputBuf;
}
inputBuf+=2;
}
}
}
theTile->validate();
}
template <class T>
void ossimEdgeFilter::runRobertsFilter(T /* dummyVariable */,
ossimRefPtr<ossimImageData> inputData)
{
ossim_uint32 bandIdx = 0;
ossim_uint32 numberOfBands = inputData->getNumberOfBands();
double v1 = 0.0;
double v2 = 0.0;
double value = 0.0;
// ossim_uint32 valueIdx = 0;
ossim_uint32 x = 0;
ossim_uint32 y = 0;
ossim_uint32 width = theTile->getWidth();
ossim_uint32 height = theTile->getHeight();
ossim_int32 rowIncrement = inputData->getWidth();
for(bandIdx = 0; bandIdx < numberOfBands; ++bandIdx)
{
T* inputBuf = static_cast<T*>(inputData->getBuf(bandIdx));
T* outputBuf = static_cast<T*>(theTile->getBuf(bandIdx));
T np = static_cast<T>(inputData->getNullPix(bandIdx));
T minP = static_cast<T>(inputData->getMinPix(bandIdx));
T maxP = static_cast<T>(inputData->getMaxPix(bandIdx));
if(inputBuf&&outputBuf)
{
for(y = 0; y < height; ++y)
{
for(x = 0; x < width; ++x)
{
if( (*inputBuf) != np)
{
v1 = (double)inputBuf[0] - (double)(inputBuf[rowIncrement+1]);
v1 = (double)inputBuf[0] - (double)(inputBuf[1]);
v2 = (double)inputBuf[1] - (double)inputBuf[rowIncrement];
v2 = (double)inputBuf[0] - (double)inputBuf[rowIncrement];
value = sqrt(v1*v1 + v2*v2);
if((value == np) ||
(value < minP))
{
*outputBuf = (static_cast<T>(minP));
}
else if(value > maxP)
{
*outputBuf = (static_cast<T>(maxP));
}
else
{
*outputBuf = (static_cast<T>(value));
}
}
else
{
*outputBuf = np;
}
++outputBuf;
++inputBuf;
}
++inputBuf;
}
}
}
theTile->validate();
}
template <class T>
void ossimEdgeFilter::runSimpleFilter(T /* dummyVariable */, ossimRefPtr<ossimImageData> inputData)
{
ossim_uint32 bandIdx = 0;
ossim_uint32 numberOfBands = inputData->getNumberOfBands();
double v1 = 0.0;
double v2 = 0.0;
double value = 0.0;
// ossim_uint32 valueIdx = 0;
ossim_uint32 x = 0;
ossim_uint32 y = 0;
ossim_uint32 width = theTile->getWidth();
ossim_uint32 height = theTile->getHeight();
ossim_int32 rowIncrement = inputData->getWidth();
for(bandIdx = 0; bandIdx < numberOfBands; ++bandIdx)
{
T* inputBuf = static_cast<T*>(inputData->getBuf(bandIdx));
T* outputBuf = static_cast<T*>(theTile->getBuf(bandIdx));
T np = static_cast<T>(inputData->getNullPix(bandIdx));
T minP = static_cast<T>(inputData->getMinPix(bandIdx));
T maxP = static_cast<T>(inputData->getMaxPix(bandIdx));
if(inputBuf&&outputBuf)
{
for(y = 0; y < height; ++y)
{
for(x = 0; x < width; ++x)
{
if( (*inputBuf) != np)
{
v1 = (double)inputBuf[0] - (double)(inputBuf[1]);
v2 = (double)inputBuf[0] - (double)inputBuf[rowIncrement];
value = sqrt(v1*v1 + v2*v2);
if((value == np) || (value < minP))
*outputBuf = (static_cast<T>(minP));
else if(value > maxP)
*outputBuf = (static_cast<T>(maxP));
else
*outputBuf = (static_cast<T>(value));
}
else
{
*outputBuf = np;
}
++outputBuf;
++inputBuf;
}
++inputBuf;
}
}
}
theTile->validate();
}
template <class T>
void ossimEdgeFilter::runLaplacianFilter(T /* dummyVariable */,
ossimRefPtr<ossimImageData> inputData)
{
ossim_uint32 bandIdx = 0;
ossim_uint32 numberOfBands = inputData->getNumberOfBands();
// double horizontalValue = 0.0;
// double verticalValue = 0.0;
double value = 0.0;
// ossim_uint32 valueIdx = 0;
ossim_uint32 x = 0;
ossim_uint32 y = 0;
ossim_uint32 width = theTile->getWidth();
ossim_uint32 height = theTile->getHeight();
ossim_int32 rowIncrement = inputData->getWidth();
ossim_int32 rowIncrement2 = 2*inputData->getWidth();
for(bandIdx = 0; bandIdx < numberOfBands; ++bandIdx)
{
T* inputBuf = static_cast<T*>(inputData->getBuf(bandIdx));
T* outputBuf = static_cast<T*>(theTile->getBuf(bandIdx));
T np = static_cast<T>(inputData->getNullPix(bandIdx));
T minP = static_cast<T>(inputData->getMinPix(bandIdx));
T maxP = static_cast<T>(inputData->getMaxPix(bandIdx));
if(inputBuf&&outputBuf)
{
for(y = 0; y < height; ++y)
{
for(x = 0; x < width; ++x)
{
if( (*(inputBuf + rowIncrement + 1) != np))
{
value = fabs(((double)inputBuf[rowIncrement + 1]*4.0) -
((double)inputBuf[1] + (double)inputBuf[rowIncrement] + (double)inputBuf[rowIncrement + 2] + (double)inputBuf[rowIncrement2+1]));
if((value == np) ||
(value < minP))
{
*outputBuf = (static_cast<T>(minP));
}
else if(value > maxP)
{
*outputBuf = (static_cast<T>(maxP));
}
else
{
*outputBuf = (static_cast<T>(value));
}
}
else
{
*outputBuf = np;
}
++outputBuf;
++inputBuf;
}
inputBuf+=2;
}
}
}
theTile->validate();
}
template <class T>
void ossimEdgeFilter::runLocalMax8Filter(T /* dummyVariable */,
ossimRefPtr<ossimImageData> inputData)
{
ossim_uint32 bandIdx = 0;
ossim_uint32 numberOfBands = inputData->getNumberOfBands();
ossim_uint32 x = 0;
ossim_uint32 y = 0;
ossim_uint32 width = theTile->getWidth();
ossim_uint32 height = theTile->getHeight();
ossim_int32 rowIncrement = inputData->getWidth();
ossim_int32 rowIncrement2 = 2*inputData->getWidth();
for(bandIdx = 0; bandIdx < numberOfBands; ++bandIdx)
{
//inputBuf has a 1 pixel edge compared to outputBuf
T* inputBuf = static_cast<T*>(inputData->getBuf(bandIdx));
T* outputBuf = static_cast<T*>(theTile->getBuf(bandIdx));
T np = static_cast<T>(inputData->getNullPix(bandIdx)); //changed to input Null
if(inputBuf&&outputBuf)
{
//one pass: maybe faster if changed to two passes
T* outB;
T* inB;
outB = outputBuf;
inB = inputBuf;
for(y = 0; y < height; ++y)
{
for(x = 0; x < width; ++x)
{
if (inB[1+rowIncrement] != np)
{
*outB = max<T>(
max<T>(
max<T>(inB[0],inB[1]),
max<T>(inB[2],inB[rowIncrement])),
max<T>(
max<T>(inB[rowIncrement+2],inB[rowIncrement2]),
max<T>(inB[rowIncrement2+1],inB[rowIncrement2+2])
));
}
else
{
*outB = np;
}
++outB;
++inB;
}
inB+=2; //go to next line, jump due to edge
}
}
}
theTile->validate();
}
bool ossimEdgeFilter::saveState(ossimKeywordlist& kwl,
const char* prefix)const
{
kwl.add(prefix,
PROP_EDGE_FILTER,
getFilterType(),
true);
return ossimImageSourceFilter::saveState(kwl, prefix);
}
bool ossimEdgeFilter::loadState(const ossimKeywordlist& kwl,
const char* prefix)
{
const char* value = kwl.find(prefix,
PROP_EDGE_FILTER );
if(value)
{
setFilterType(ossimString(value));
} else {
ossimNotify(ossimNotifyLevel_WARN) << "ossimEdgeFilter::loadState WARN: no filter type found" << std::endl;
}
return ossimImageSourceFilter::loadState(kwl, prefix);
}