Package boofcv.alg.transform.census

Class GCensusTransform

java.lang.Object

boofcv.alg.transform.census.GCensusTransform

public class GCensusTransform
extends Object

The Census Transform [1] computes a bit mask for each pixel in the image. If a neighboring pixel is greater than the center pixel in a region that bit is set to 1. A 3x3 region 9radius=1) is encoded in 8-bits and a 5x5 region (radius=2) in 24-bits. To compute the error between two pixels simply compute the hamming distance. The hamming distance for an input can be computed using DescriptorDistance.hamming().

DEVELOPMENT NOTE: See if this can be speed up by only comparing each pixel with another once. Code will be complex

[1] Zabih, Ramin, and John Woodfill. "Non-parametric local transforms for computing visual correspondence." European conference on computer vision. Springer, Berlin, Heidelberg, 1994.

See Also:

• CensusTransform

Constructor Summary

Constructors

Constructor	Description
GCensusTransform()

Method Summary

Modifier and Type	Method	Description
static <T extends ImageGray<T>> void	dense3x3(T input, GrayU8 output, @Nullable ImageBorder<T> border)
static <T extends ImageGray<T>> void	dense5x5(T input, GrayS32 output, @Nullable ImageBorder<T> border)
static <T extends ImageGray<T>> void	sample_IU16(T input, FastAccess<Point2D_I32> sample, InterleavedU16 output, @Nullable ImageBorder<T> border, @Nullable DogArray_I32 workSpace)
static <T extends ImageGray<T>> void	sample_S64(T input, FastAccess<Point2D_I32> sample, GrayS64 output, @Nullable ImageBorder<T> border, @Nullable DogArray_I32 workSpace)

Methods inherited from class java.lang.Object

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

Constructor Details

GCensusTransform

public GCensusTransform()

Method Details

dense3x3

public static <T extends ImageGray<T>> void dense3x3(T input,
 GrayU8 output,
 @Nullable
 @Nullable ImageBorder<T> border)

dense5x5

public static <T extends ImageGray<T>> void dense5x5(T input,
 GrayS32 output,
 @Nullable
 @Nullable ImageBorder<T> border)

sample_S64

public static <T extends ImageGray<T>> void sample_S64(T input,
 FastAccess<Point2D_I32> sample,
 GrayS64 output,
 @Nullable
 @Nullable ImageBorder<T> border,
 @Nullable
 @Nullable DogArray_I32 workSpace)

sample_IU16

public static <T extends ImageGray<T>> void sample_IU16(T input,
 FastAccess<Point2D_I32> sample,
 InterleavedU16 output,
 @Nullable
 @Nullable ImageBorder<T> border,
 @Nullable
 @Nullable DogArray_I32 workSpace)