Package boofcv.alg.flow

Class DenseFlowPyramidBase<T extends ImageGray<T>>

java.lang.Object

boofcv.alg.flow.DenseFlowPyramidBase<T>

Direct Known Subclasses:

BroxWarpingSpacial, HornSchunckPyramid

public abstract class DenseFlowPyramidBase<T extends ImageGray<T>>
extends Object

Base class for pyramidal dense flow algorithms based on IPOL papers.

Field Summary

Fields

Modifier and Type	Field	Description
protected InterpolatePixelS<GrayF32>	interp
protected PyramidFloat<GrayF32>	pyr1
protected PyramidFloat<GrayF32>	pyr2

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	DenseFlowPyramidBase(double scale, double sigma, int maxLayers, InterpolatePixelS<GrayF32> interp)

Method Summary

Modifier and Type	Method	Description
protected static <T extends ImageGray<T>> void	imageNormalization(T image1, T image2, GrayF32 normalized1, GrayF32 normalized2)	Function to normalize the images between 0 and 255.
protected void	interpolateFlowScale(GrayF32 prev, GrayF32 curr)	Takes the flow from the previous lower resolution layer and uses it to initialize the flow in the current layer.
abstract void	process(ImagePyramid<GrayF32> image1, ImagePyramid<GrayF32> image2)	Computes dense optical flow from the provided image pyramid.
void	process(T image1, T image2)	Processes the raw input images.
protected void	warpImageTaylor(GrayF32 before, GrayF32 flowX, GrayF32 flowY, GrayF32 after)	Takes the flow from the previous lower resolution layer and uses it to initialize the flow in the current layer.

Methods inherited from class java.lang.Object

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

Field Details

pyr1

protected PyramidFloat<GrayF32> pyr1

pyr2

protected PyramidFloat<GrayF32> pyr2

interp

protected InterpolatePixelS<GrayF32> interp

Constructor Details

DenseFlowPyramidBase

protected DenseFlowPyramidBase(double scale,
 double sigma,
 int maxLayers,
 InterpolatePixelS<GrayF32> interp)

Method Details

process

public void process(T image1,
 T image2)

Processes the raw input images. Normalizes them and creates image pyramids from them.

interpolateFlowScale

protected void interpolateFlowScale(GrayF32 prev,
 GrayF32 curr)

Takes the flow from the previous lower resolution layer and uses it to initialize the flow in the current layer. Adjusts for change in image scale.

warpImageTaylor

protected void warpImageTaylor(GrayF32 before,
 GrayF32 flowX,
 GrayF32 flowY,
 GrayF32 after)

Takes the flow from the previous lower resolution layer and uses it to initialize the flow in the current layer. Adjusts for change in image scale.

process

public abstract void process(ImagePyramid<GrayF32> image1,
 ImagePyramid<GrayF32> image2)

Computes dense optical flow from the provided image pyramid. Image gradient for each layer should be computed directly from the layer images.

Parameters:

image1 - Pyramid of first image

image2 - Pyramid of second image

imageNormalization

protected static <T extends ImageGray<T>> void imageNormalization(T image1,
 T image2,
 GrayF32 normalized1,
 GrayF32 normalized2)

Function to normalize the images between 0 and 255.