Basic Image AlgorithmS Library  2.8.0
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BIAS::HistogramEqualization< InputStorageType, OutputStorageType > Class Template Reference

perfoms a histogram equalization on a grey value image More...

#include <Image/HistogramEqualization.hh>

+ Inheritance diagram for BIAS::HistogramEqualization< InputStorageType, OutputStorageType >:
+ Collaboration diagram for BIAS::HistogramEqualization< InputStorageType, OutputStorageType >:

Public Types

enum  TBorderHandling { TBH_full, TBH_same, TBH_valid }
 enum for border calculation, same meanings as in matlab: More...
 

Public Member Functions

int AdaptiveHistogramEqualization (const Image< InputStorageType > &src, Image< OutputStorageType > &dst, unsigned int numRows=8, unsigned int numCols=8)
 
void AddDebugLevel (const long int lv)
 
void AddDebugLevel (const std::string &name)
 
void CopyNonROIFromSource (const Image< InputStorageType > &src, Image< OutputStorageType > &dst) const
 run over all pixel which do not belong to the roi and set them to the value in the source image regardless of the roi of the source. More...
 
bool DebugLevelIsSet (const long int lv) const
 
bool DebugLevelIsSet (const std::string &name) const
 
virtual int Filter (const Image< InputStorageType > &src, Image< OutputStorageType > &dst)
 prototyp for filter computation function More...
 
int GetBorderHandling () const
 
void GetBorders (int &border_x, int &border_y) const
 
int GetDebugLevel () const
 
std::ostream & GetDebugStream () const
 
void GetDebugStream (std::ostream &os) const
 
 HistogramEqualization ()
 
long int Name2DebugLevel (const std::string &name) const
 looks up a debuglevel in the internal map, returns 0 if not found More...
 
long int NewDebugLevel (const std::string &name)
 creates a new debuglevel More...
 
void PrintDebugLevel (std::ostream &os=std::cout) const
 
void RemoveDebugLevel (const long int lv)
 
void RemoveDebugLevel (const std::string &name)
 
void SetBorderHandling (const int bh)
 
void SetCutOffs (InputStorageType minCutOff, InputStorageType maxCutOff)
 
void SetDebugLevel (const long int lv)
 
void SetDebugLevel (const std::string &name)
 
void SetDebugStream (const std::ostream &os)
 
void SetNonROIToValue (Image< OutputStorageType > &dst, const std::vector< OutputStorageType > &t) const
 run over all pixel which do not belong to the roi and set them to some value (typically black) More...
 
void ShowDebugLevel (std::ostream &os=std::cout) const
 prints all internally known debuglevels More...
 
 ~HistogramEqualization ()
 

Static Public Member Functions

static long int GetGlobalDebugLevel ()
 
static void SetGlobalDebugLevel (long int lev)
 

Protected Member Functions

long ConsumeNextFreeDebuglevel_ ()
 returns the next available debuglevel More...
 
void GetBordersValid_ (int &border_x, int &border_y) const
 

Protected Attributes

int _FilterBorderHandling
 
long int _liDebugLevel
 
long int _liNextDebugLevel
 new concept, debuglevel are managed here in the debug class More...
 
std::map< std::string, long int > _String2Debuglevel
 
InputStorageType maxCutOff_
 
InputStorageType minCutOff_
 

Static Protected Attributes

static std::ostream _zDebugStream
 
static long int GlobalDebugLevel = 0
 

Detailed Description

template<class InputStorageType, class OutputStorageType>
class BIAS::HistogramEqualization< InputStorageType, OutputStorageType >

perfoms a histogram equalization on a grey value image

this improves the contrast of low contrast images by redistributing the intensities on the histrogram. this is done by reassigning the pixel intensities.

the histogram equalization is done by the following steps:

  1. compute histogram (a bin for every possible grey value)
  2. loop through filled bins b[n]. start with bin of lowest grey value. b[0] for every bin b[i] compute sum s(i) of bin values so far ( b[0]+b[1]+ ... + b[i] )

  3. create a look up table which maps the old intensity (grey) values to new ones.

    newgreyvalue(i) = (s(i)/NumOfAllPixelsInImage) * PossibleNumberOfGreyValues

  4. use lookup table to remap input image

this template can be used for 8 or 16bit integer values. don't try this with float or double.

Examples:
ExampleHistogramEqualization.cpp.

Definition at line 51 of file HistogramEqualization.hh.

Member Enumeration Documentation

template<class InputStorageType, class OutputStorageType>
enum BIAS::FilterBase::TBorderHandling
inherited

enum for border calculation, same meanings as in matlab:

  • TBH_valid: returns only the pixels whose values can be computed without using zero padding of the input image. The resulting output image is smaller than the input image. The ROI of the output image is set accordingly.
  • TBH_same: returns the set of pixels that can be computed by applying the filter to all pixels that are actually part of the input image. Border pixels are computed using zero padding, but the center pixel of the computational kernel is applied only to pixels in the image. This results in an output image that is the same size as the input image.
  • TBH_full: returns the full convolution. This means conv2 returns all pixels for which any of the pixels in the computational molecule overlap pixels in the image, even when the center pixel is outside the input image. The resulting output image is larger than the input image. This is not implemented at the moment.
Enumerator
TBH_full 
TBH_same 
TBH_valid 

Definition at line 98 of file FilterBase.hh.

Constructor & Destructor Documentation

template<class InputStorageType, class OutputStorageType>
BIAS::HistogramEqualization< InputStorageType, OutputStorageType >::HistogramEqualization ( )
inline

Definition at line 55 of file HistogramEqualization.hh.

template<class InputStorageType, class OutputStorageType>
BIAS::HistogramEqualization< InputStorageType, OutputStorageType >::~HistogramEqualization ( )
inline

Definition at line 60 of file HistogramEqualization.hh.

Member Function Documentation

template<class InputStorageType , class OutputStorageType >
int HistogramEqualization::AdaptiveHistogramEqualization ( const Image< InputStorageType > &  src,
Image< OutputStorageType > &  dst,
unsigned int  numRows = 8,
unsigned int  numCols = 8 
)

Definition at line 82 of file HistogramEqualization.cpp.

References BIAS::ImageBase::GetBitDepth(), BIAS::ImageBase::GetChannelCount(), BIAS::ImageBase::GetHeight(), BIAS::Image< StorageType >::GetImageDataArray(), BIAS::ImageBase::GetROI(), BIAS::ImageBase::GetWidth(), BIAS::Image< StorageType >::Init(), BIAS::ROI::IsInROI(), BIAS::Image< StorageType >::Release(), and BIAS::ImageBase::SamePixelAndChannelCount().

void BIAS::Debug::AddDebugLevel ( const long int  lv)
inlineinherited
Examples:
EvaluateAlignment.cpp, ExampleAlignment.cpp, ExampleMinMax.cpp, ExampleRANSAC_double.cpp, ExampleRANSACPlane.cpp, and ExampleTriangulateOptimal.cpp.

Definition at line 355 of file Debug.hh.

Referenced by BIAS::GLProjectionParametersBase::AddDebugLevel(), BIAS::Triangulation::CorrectCorrespondences(), BIAS::FilterBase< InputStorageType, OutputStorageType >::FilterBase(), BIAS::ShowCamWxVideoSourceFactory::OpenDevice(), and BIAS::SceneOpenSceneGraph::SceneOpenSceneGraph().

void BIAS::Debug::AddDebugLevel ( const std::string &  name)
inlineinherited

Definition at line 362 of file Debug.hh.

long BIAS::Debug::ConsumeNextFreeDebuglevel_ ( )
inlineprotectedinherited

returns the next available debuglevel

Author
woelk 09/2006

Definition at line 521 of file Debug.hh.

template<class InputStorageType, class OutputStorageType>
void FilterBase::CopyNonROIFromSource ( const Image< InputStorageType > &  src,
Image< OutputStorageType > &  dst 
) const
inherited

run over all pixel which do not belong to the roi and set them to the value in the source image regardless of the roi of the source.

Both images must have same size.

Author
koeser 12/2008

Definition at line 135 of file FilterBase.cpp.

References BIAS::ImageBase::GetChannelCount(), BIAS::ROI::GetCorners(), BIAS::ImageBase::GetHeight(), BIAS::Image< StorageType >::GetImageDataArray(), BIAS::ImageBase::GetROI(), BIAS::ImageBase::GetWidth(), and BIAS::ROI_Corners.

bool BIAS::Debug::DebugLevelIsSet ( const long int  lv) const
inlineinherited
Examples:
ExampleTriangulateOptimal.cpp.

Definition at line 341 of file Debug.hh.

Referenced by BIAS::GenSynthMatches::_AddUniformDistributedOutliers(), BIAS::GenSynthMatches::_CreateCamMovement(), BIAS::GenSynthMatches::_CreateStatic2DPoints(), BIAS::UnscentedTransform::ComputeSigmaPoints_(), BIAS::Triangulation::CorrectCorrespondences(), BIAS::GenSynthMatches::GetGTNormalizedF(), BIAS::MonteCarloTransform::GetSamples_(), and BIAS::MonteCarloTransform::Transform().

bool BIAS::Debug::DebugLevelIsSet ( const std::string &  name) const
inlineinherited

Definition at line 350 of file Debug.hh.

template<class InputStorageType , class OutputStorageType >
int HistogramEqualization::Filter ( const Image< InputStorageType > &  src,
Image< OutputStorageType > &  dst 
)
virtual

prototyp for filter computation function

Implements BIAS::FilterBase< InputStorageType, OutputStorageType >.

Definition at line 11 of file HistogramEqualization.cpp.

References BIAS::Image< StorageType >::AboveThresholdToValue(), BIAS::HistogramImage::AddHist(), BIAS::Image< StorageType >::BelowThresholdToValue(), BIAS::HistogramImage::GetBin(), BIAS::HistogramImage::GetBinCount(), BIAS::ImageBase::GetChannelCount(), BIAS::ImageBase::GetHeight(), BIAS::Image< StorageType >::GetImageDataArray(), BIAS::ImageBase::GetROI(), BIAS::ImageBase::GetWidth(), BIAS::Image< StorageType >::Init(), BIAS::HistogramImage::InitHist(), BIAS::ROI::IsInROI(), BIAS::Image< StorageType >::Release(), and BIAS::ImageBase::SamePixelAndChannelCount().

template<class InputStorageType, class OutputStorageType>
int BIAS::FilterBase< InputStorageType, OutputStorageType >::GetBorderHandling ( ) const
inlineinherited

Definition at line 129 of file FilterBase.hh.

template<class InputStorageType , class OutputStorageType >
void FilterBase::GetBorders ( int &  border_x,
int &  border_y 
) const
inherited

Definition at line 61 of file FilterBase.cpp.

Referenced by BIAS::Rescale< InputStorageType, OutputStorageType >::GetBordersValid_().

template<class InputStorageType, class OutputStorageType>
void BIAS::HistogramEqualization< InputStorageType, OutputStorageType >::GetBordersValid_ ( int &  border_x,
int &  border_y 
) const
inlineprotectedvirtual

Implements BIAS::FilterBase< InputStorageType, OutputStorageType >.

Definition at line 78 of file HistogramEqualization.hh.

int BIAS::Debug::GetDebugLevel ( ) const
inlineinherited
Examples:
ExampleCamera.cpp, ExampleCamPoseCalib.cpp, ExampleCopy.cpp, and ExampleParabola.cpp.

Definition at line 332 of file Debug.hh.

Referenced by BIAS::listenthread(), BIAS::Image< StorageType >::operator=(), and BIAS::ImageBase::operator=().

std::ostream& BIAS::Debug::GetDebugStream ( ) const
inlineinherited

Definition at line 405 of file Debug.hh.

void BIAS::Debug::GetDebugStream ( std::ostream &  os) const
inlineinherited

Definition at line 414 of file Debug.hh.

static long int BIAS::Debug::GetGlobalDebugLevel ( )
inlinestaticinherited

Definition at line 431 of file Debug.hh.

long int BIAS::Debug::Name2DebugLevel ( const std::string &  name) const
inlineinherited

looks up a debuglevel in the internal map, returns 0 if not found

Author
woelk 09/2006

Definition at line 454 of file Debug.hh.

long int BIAS::Debug::NewDebugLevel ( const std::string &  name)
inlineinherited

creates a new debuglevel

Author
woelk 09/2006

Definition at line 474 of file Debug.hh.

Referenced by BIAS::COSAC< SolutionType >::COSAC(), BIAS::ProjectionParametersPerspectiveDepth::Init(), BIAS::MonteCarloTransform::MonteCarloTransform(), BIAS::PMatrixEstimation::PMatrixEstimation(), BIAS::PreemptiveRANSAC< SolutionType >::PreemptiveRANSAC(), BIAS::RANSACPreKnowledge< SolutionType >::RANSACPreKnowledge(), BIAS::ROI::ROI(), BIAS::RotationAveraging::RotationAveraging(), BIAS::SceneOpenSceneGraph::SceneOpenSceneGraph(), BIAS::ThreeDOutOpenSceneGraph::ThreeDOutOpenSceneGraph(), BIAS::Triangulation::Triangulation(), and BIAS::UnscentedTransform::UnscentedTransform().

void BIAS::Debug::PrintDebugLevel ( std::ostream &  os = std::cout) const
inlineinherited

Definition at line 383 of file Debug.hh.

void BIAS::Debug::RemoveDebugLevel ( const long int  lv)
inlineinherited

Definition at line 369 of file Debug.hh.

void BIAS::Debug::RemoveDebugLevel ( const std::string &  name)
inlineinherited

Definition at line 376 of file Debug.hh.

template<class InputStorageType, class OutputStorageType>
void BIAS::FilterBase< InputStorageType, OutputStorageType >::SetBorderHandling ( const int  bh)
inlineinherited

Definition at line 127 of file FilterBase.hh.

Referenced by BIAS::PMDImageProc::DenoiseDepthImage(), BIAS::CalibratedPyramid< StorageType >::Downsample_(), BIAS::PMDImageProc::FitDepthTo2DImage(), and BIAS::PMDImageProc::FitDepthTo2DImageFree_().

template<class InputStorageType, class OutputStorageType>
void BIAS::HistogramEqualization< InputStorageType, OutputStorageType >::SetCutOffs ( InputStorageType  minCutOff,
InputStorageType  maxCutOff 
)
inline

Definition at line 68 of file HistogramEqualization.hh.

void BIAS::Debug::SetDebugLevel ( const long int  lv)
inlineinherited
Examples:
ExampleCamera.cpp, ExampleCamPoseCalib.cpp, ExampleCopy.cpp, ExampleDcam.cpp, ExampleDcamImageConvert.cpp, ExampleDirectToDisk.cpp, ExampleGrabTrippleFromXB3.cpp, ExampleHarrisColor.cpp, ExampleLDA.cpp, ExampleLineMatcher.cpp, ExampleMDCamToShm.cpp, ExampleParabola.cpp, ExamplePMatrix.cpp, ExamplePtGreyHiresColor.cpp, ExampleVideoSource_Shm.cpp, and Scan1394Bus.cpp.

Definition at line 318 of file Debug.hh.

Referenced by BIAS::ShowCamWxVideoSourceFactory::CreateBumbleBee(), BIAS::ShowCamWxVideoSourceFactory::CreateDCAM(), BIAS::VideoSource_MDcam::ScanBus(), BIAS::GLProjectionParametersBase::SetDebugLevel(), BIAS::VideoSource_Disk::VideoSource_Disk(), BIAS::VideoSource_DV2::VideoSource_DV2(), BIAS::VideoSource_DV::VideoSource_DV_Internal_Init_(), and BIAS::VideoSource_V4L::VideoSource_V4L().

void BIAS::Debug::SetDebugLevel ( const std::string &  name)
inlineinherited

Definition at line 325 of file Debug.hh.

void BIAS::Debug::SetDebugStream ( const std::ostream &  os)
inlineinherited

Definition at line 398 of file Debug.hh.

static void BIAS::Debug::SetGlobalDebugLevel ( long int  lev)
inlinestaticinherited

Definition at line 424 of file Debug.hh.

template<class InputStorageType , class OutputStorageType>
void FilterBase::SetNonROIToValue ( Image< OutputStorageType > &  dst,
const std::vector< OutputStorageType > &  t 
) const
inherited

run over all pixel which do not belong to the roi and set them to some value (typically black)

Author
koeser 12/2008

Definition at line 84 of file FilterBase.cpp.

References BIAS::ImageBase::GetChannelCount(), BIAS::ROI::GetCorners(), BIAS::ImageBase::GetHeight(), BIAS::Image< StorageType >::GetImageDataArray(), BIAS::ImageBase::GetROI(), BIAS::ImageBase::GetWidth(), and BIAS::ROI_Corners.

void BIAS::Debug::ShowDebugLevel ( std::ostream &  os = std::cout) const
inlineinherited

prints all internally known debuglevels

Author
woelk 09/2006

Definition at line 496 of file Debug.hh.

Member Data Documentation

template<class InputStorageType, class OutputStorageType>
int BIAS::FilterBase< InputStorageType, OutputStorageType >::_FilterBorderHandling
protectedinherited

Definition at line 132 of file FilterBase.hh.

Referenced by BIAS::FilterBase< InputStorageType, OutputStorageType >::FilterBase().

long int BIAS::Debug::_liDebugLevel
protectedinherited

Definition at line 510 of file Debug.hh.

Referenced by BIAS::Debug::operator=(), and BIAS::ImageBase::operator=().

long int BIAS::Debug::_liNextDebugLevel
protectedinherited

new concept, debuglevel are managed here in the debug class

Definition at line 516 of file Debug.hh.

Referenced by BIAS::Debug::operator=().

std::map<std::string, long int> BIAS::Debug::_String2Debuglevel
protectedinherited

Definition at line 517 of file Debug.hh.

Referenced by BIAS::Debug::operator=().

std::ostream BIAS::Debug::_zDebugStream
staticprotectedinherited

Definition at line 511 of file Debug.hh.

Referenced by BIAS::Debug::operator=().

long int BIAS::Debug::GlobalDebugLevel = 0
staticprotectedinherited

Definition at line 513 of file Debug.hh.

template<class InputStorageType, class OutputStorageType>
InputStorageType BIAS::HistogramEqualization< InputStorageType, OutputStorageType >::maxCutOff_
protected

Definition at line 76 of file HistogramEqualization.hh.

template<class InputStorageType, class OutputStorageType>
InputStorageType BIAS::HistogramEqualization< InputStorageType, OutputStorageType >::minCutOff_
protected

Definition at line 75 of file HistogramEqualization.hh.

The documentation for this class was generated from the following files:
Generated on Tue Feb 6 2018 02:01:57 for Basic Image AlgorithmS Library by   doxygen 1.8.5