Module imagingbook.common

Package imagingbook.common.mser

Class MserDetector

java.lang.Object

imagingbook.common.mser.MserDetector

public class MserDetector
extends Object

Performs "Maximally Stable Extremal Region" (MSER) detection [1] on gray-scale images. See Chapter 26 of [2] for more details. The constructor sets up the complete component tree for the specified image but does not perform feature detection itself, which is done by calling getMserFeatures().

[1] J. Matas, O. Chum, M. Urban, and T. Pajdla. Robust widebaseline stereo from maximally stable extremal regions. Image and Vision Computing 22(10), 761–767 (2004).
[2] W. Burger, M.J. Burge, Digital Image Processing – An Algorithmic Introduction, 3rd ed, Springer (2022).

Version:

2022/11/23

Constructor Summary

Constructors

Constructor	Description
MserDetector(ByteProcessor ip)	Constructor using default parameters.
MserDetector(ByteProcessor ip, MserParameters params)	Constructor using explicit parameters.

Method Summary

Modifier and Type	Method	Description
ComponentTree<MserData>	getComponentTree()	Returns the component tree for this MSER detector.
double	getElapsedTime()	Returns the time required for the MSER detector to process the associated image (in milliseconds).
List<Component<MserData>>	getMserFeatures()	Extracts and returns a list of MSER components.

Methods inherited from class java.lang.Object

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

Constructor Details

MserDetector

public MserDetector(ByteProcessor ip)

Constructor using default parameters.

Parameters:

ip - the input image

See Also:

• MserDetector(ByteProcessor, MserParameters)

MserDetector

public MserDetector(ByteProcessor ip,
 MserParameters params)

Constructor using explicit parameters. A set of parameters can be specified (see MserParameters). The constructor sets up the complete component tree but does not perform feature detection itself, which is done by calling getMserFeatures().

Parameters:

ip - the input image

params - a MserParameters instance

See Also:

• MserParameters

Method Details

getMserFeatures

public List<Component<MserData>> getMserFeatures()

Extracts and returns a list of MSER components. Features are extracted only once and cached for subsequent calls.

Returns:

a list of extracted MSER components

getComponentTree

public ComponentTree<MserData> getComponentTree()

Returns the component tree for this MSER detector.

Returns:

the component tree

getElapsedTime

public double getElapsedTime()

Returns the time required for the MSER detector to process the associated image (in milliseconds).

Returns:

time required for MSER detection (ms)