boofcv.alg.feature.describe

Class DescribePointBinaryCompare<T extends boofcv.struct.image.ImageGray>

java.lang.Object

boofcv.alg.feature.describe.DescribePointBinaryCompare<T>

Direct Known Subclasses:

ImplDescribeBinaryCompare_F32, ImplDescribeBinaryCompare_U8

public abstract class DescribePointBinaryCompare<T extends boofcv.struct.image.ImageGray>
extends java.lang.Object

For each bit in the descriptor it samples two points inside an image patch and compares their values. A value of 1 or 0 is assigned depending on their relative values. This type of descriptor is referred to as a random tree [1], random fern, and is used in BRIEF.

[1] Y. Amit and D. Geman. Shape Quantization and Recognition with Randomized Trees. Neural Computation, 9(7):1545–1588, 1997.

Field Summary

Fields

Modifier and Type	Field and Description
protected BinaryCompareDefinition_I32	definition
protected T	image
protected int[]	offsetsA
protected int[]	offsetsB

Constructor Summary

Constructors

Constructor and Description
DescribePointBinaryCompare(BinaryCompareDefinition_I32 definition)

Method Summary

Modifier and Type	Method and Description
BinaryCompareDefinition_I32	getDefinition()
void	process(int c_x, int c_y, TupleDesc_B feature) Computes the descriptor at the specified point.
abstract void	processBorder(int c_x, int c_y, TupleDesc_B feature) Called if the descriptor region goes outside the image border
abstract void	processInside(int c_x, int c_y, TupleDesc_B feature) Called if the descriptor region is contained entirely inside the image
void	setImage(T image) Specifies the image from which feature descriptions are to be created.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

definition

protected BinaryCompareDefinition_I32 definition

image

protected T extends boofcv.struct.image.ImageGray image

offsetsA

protected int[] offsetsA

offsetsB

protected int[] offsetsB

Constructor Detail

DescribePointBinaryCompare

public DescribePointBinaryCompare(BinaryCompareDefinition_I32 definition)

Method Detail

setImage

public void setImage(T image)

Specifies the image from which feature descriptions are to be created.

Parameters:

image - Image being examined.

process

public void process(int c_x,
                    int c_y,
                    TupleDesc_B feature)

Computes the descriptor at the specified point. If the region go outside of the image then a description will not be made.

Parameters:

c_x - Center of region being described.

c_y - Center of region being described.

feature - Where the descriptor is written to.

processInside

public abstract void processInside(int c_x,
                                   int c_y,
                                   TupleDesc_B feature)

Called if the descriptor region is contained entirely inside the image

processBorder

public abstract void processBorder(int c_x,
                                   int c_y,
                                   TupleDesc_B feature)

Called if the descriptor region goes outside the image border

getDefinition

public BinaryCompareDefinition_I32 getDefinition()