w2img::HysteresisSegmenter Class Reference

Inheritance diagram for w2img::HysteresisSegmenter:

w2img::Segmenter w2img::AdaptiveHysteresisSegmenter List of all members.

Detailed Description

Will segment the given image into regions based on two thresholds.

An object consists of contiguous pixels above thresh1 that contain at least one pixel with value above thresh2.

Author:
Lakshman
Version:
Id
w2img_HysteresisSegmenter.h,v 1.3 2011/09/29 15:13:05 Madison.Burnett Exp


Public Types

typedef Cluster< SingleFeatureRegionProperty
 The simplest region property is a cluster of a single feature.
typedef std::vector< int > Replacement
 Given a region with label i, Replacement[i] provides the new label, usually at a particular scale.

Public Member Functions

 HysteresisSegmenter (int thresh1, int thresh2, int sm_size=1, bool wrapAroundRadials=false)
 Will segment the given image into regions based on two thresholds.
virtual SegmenterResult segment (const code::Image< int > &orig)
 The resulting image has pixels marked with the region number, starting at 1.
SegmenterResult segment (const code::Image< int > &orig) const
 The resulting image has pixels marked with the region number, starting at 1.
virtual ~HysteresisSegmenter ()
int getHigherThreshold () const
int getLowerThreshold () const

Static Public Member Functions

static void computeRegionProperty (const code::Image< int > &orig, const SegmenterResult &label, std::vector< RegionProperty > *fillme)
 Fills in the passed in vector with a vector of computed region properties.
static void computeRegionProperty (const SegmenterResult &label, std::vector< RegionProperty > *fillme)
 Fills in the passed in vector with a vector of computed region properties.
static void normalize (Segmenter::Replacement &replacement)
 completes the cycle
static SegmenterResult relabel (const SegmenterResult &label_img)
 Will relabel the image, removing unused labels.

Protected Member Functions

virtual bool isSeedForNewRegion (int dataval, int row, int col) const
void expand_segment (int x, int y, const code::Image< int > &orig, code::Image< int > &segimg, int label) const
 Set the segimg at x,y to be label and then call this function.

Static Protected Attributes

static const int Unset = -1000
static const int Invalid = -2000


Member Typedef Documentation

typedef Cluster< SingleFeature > w2img::Segmenter::RegionProperty [inherited]

The simplest region property is a cluster of a single feature.

typedef std::vector<int> w2img::Segmenter::Replacement [inherited]

Given a region with label i, Replacement[i] provides the new label, usually at a particular scale.

The Replacement structure is such that replacement[i] provides the replacement label for the current label i. This replacement may be 0 or negative, which means that no replacement exists.


Constructor & Destructor Documentation

w2img::HysteresisSegmenter::HysteresisSegmenter ( int  thresh1,
int  thresh2,
int  sm_size = 1,
bool  wrapAroundRadials = false 
)

Will segment the given image into regions based on two thresholds.

An object consists of contiguous pixels above thresh1 that contain at least one pixel with value above thresh2. The optional smoothing filter size sets the size of the rectangular filter to use in smoothing the image before contouring.

virtual w2img::HysteresisSegmenter::~HysteresisSegmenter (  )  [inline, virtual]


Member Function Documentation

static void w2img::Segmenter::computeRegionProperty ( const SegmenterResult label,
std::vector< RegionProperty > *  fillme 
) [static, inherited]

Fills in the passed in vector with a vector of computed region properties.

The input label image should be a labeled image such as that returned by the segmenter. WARNING: The resulting properties will not have any of the value elements set because the original image was not passed in.

static void w2img::Segmenter::computeRegionProperty ( const code::Image< int > &  orig,
const SegmenterResult label,
std::vector< RegionProperty > *  fillme 
) [static, inherited]

Fills in the passed in vector with a vector of computed region properties.

The input label image should be a labeled image such as that returned by the segmenter.

void w2img::Segmenter::expand_segment ( int  x,
int  y,
const code::Image< int > &  orig,
code::Image< int > &  segimg,
int  label 
) const [protected, inherited]

Set the segimg at x,y to be label and then call this function.

It will expand out segimg to all contiguous values that match

int w2img::HysteresisSegmenter::getHigherThreshold (  )  const [inline]

int w2img::HysteresisSegmenter::getLowerThreshold (  )  const [inline]

virtual bool w2img::HysteresisSegmenter::isSeedForNewRegion ( int  dataval,
int  row,
int  col 
) const [inline, protected, virtual]

Reimplemented in w2img::AdaptiveHysteresisSegmenter.

static void w2img::Segmenter::normalize ( Segmenter::Replacement replacement  )  [static, inherited]

completes the cycle

static SegmenterResult w2img::Segmenter::relabel ( const SegmenterResult label_img  )  [static, inherited]

Will relabel the image, removing unused labels.

SegmenterResult w2img::HysteresisSegmenter::segment ( const code::Image< int > &  orig  )  const [inline]

The resulting image has pixels marked with the region number, starting at 1.

Zero values do not belong to any region.

virtual SegmenterResult w2img::HysteresisSegmenter::segment ( const code::Image< int > &  orig  )  [inline, virtual]

The resulting image has pixels marked with the region number, starting at 1.

Zero values do not belong to any region.

Implements w2img::Segmenter.


Member Data Documentation

const int w2img::Segmenter::Invalid = -2000 [static, protected, inherited]

const int w2img::Segmenter::Unset = -1000 [static, protected, inherited]


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