Module imagingbook.common

Package imagingbook.common.mser

Class LocalAffineFrameExtractor

java.lang.Object

imagingbook.common.mser.LocalAffineFrameExtractor

public class LocalAffineFrameExtractor
extends Object

Provides functionality to extract local affine frames from a given image. Assumes that the specified image has a white background (255) and black (0) objects. See Section 26.5 of [1] for a detailed description.

[1] W. Burger, M.J. Burge, Digital Image Processing – An Algorithmic Introduction, 3rd ed, Springer (2022).

Version:

2022/11/19

See Also:

• AffineMapping2D
• ImageMapper

Constructor Summary

Constructors

Constructor	Description
LocalAffineFrameExtractor(ImageProcessor sourceIp, int m)	Short constructor.
LocalAffineFrameExtractor(ImageProcessor sourceIp, int m, double s, boolean useAntiAliasingFilter)	Full constructor.

Method Summary

Modifier and Type	Method	Description
ImageProcessor	getLocalAffineFrame(Component<MserData> mser)	Extracts a single local-affine frame for the specified MSER component.

Methods inherited from class java.lang.Object

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

Constructor Details

LocalAffineFrameExtractor

public LocalAffineFrameExtractor(ImageProcessor sourceIp,
 int m,
 double s,
 boolean useAntiAliasingFilter)

Full constructor.

Parameters:

sourceIp - the image to extract frames from

m - size of the (square) frames to extract (W = H = 2 m + 1)

s - size ratio between outer and inner ellipse

useAntiAliasingFilter - turn anti-aliasing filter on or off

LocalAffineFrameExtractor

public LocalAffineFrameExtractor(ImageProcessor sourceIp,
 int m)

Short constructor.

Parameters:

sourceIp - the image to extract frames from

m - size of the (square) frames to extract (W = H = 2 m + 1)

Method Details

getLocalAffineFrame

public ImageProcessor getLocalAffineFrame(Component<MserData> mser)

Extracts a single local-affine frame for the specified MSER component. The extracted image has the same type as the original source image (passed to the constructor).

Parameters:

mser - a MSER component

Returns:

the local-affine frame (instance of ImageProcessor)