org.openimaj.image.text.extraction.swt

Class SWTTextDetector.Options

java.lang.Object

org.openimaj.image.text.extraction.swt.SWTTextDetector.Options

Enclosing class:

SWTTextDetector

public static class SWTTextDetector.Options
extends Object

Options for controlling the SWTTextDetector.

Author:

Jonathon Hare (jsh2@ecs.soton.ac.uk)

Field Summary

Fields

Modifier and Type	Field and Description
CannyEdgeDetector	canny The canny edge detector to use for the SWT.
SWTTextDetector.Direction	direction The "direction" to perform the SWT
boolean	doubleSize Upscale the image to double size before applying the SWT.
float	intensityThreshold Maximum difference in intensity for two letters to be considered to be related
float	intersectRatio Ratio of vertical intersection for character pairing.
float	letterHeightRatio Maximum ratio of height for two letters to be considered to be related
double	letterVarianceMean Maximum allowed variance of stroke width in a single character as a percentage of the mean.
double	maxAspectRatio Maximum allowed aspect ratio for a single letter
double	maxDiameterStrokeRatio Maximum allowed ratio of diameter to stroke width for a single character.
float	maxHeight Maximum character height
int	maxNumOverlappingBoxes Maximum allowed number of overlapping characters
int	maxStrokeWidth Maximum allowed stroke width
float	medianStrokeWidthRatio Maximum ratio of stroke width for two letters to be considered to be related
int	minArea Minimum allowed component size; used to quickly filter out small components.
float	minHeight Minimum character height
int	minLettersPerLine Minimum number of allowed letters on a line
float	strokeWidthRatio Maximum allowed ratio of a pair of stroke widths for them to be considered part of the same connected component.
float	widthMultiplier The width multiplier for two letters to be considered to be related.
float	wordBreakdownRatio Ratio of the interclass std dev of the letter spacings to the mean to suggest a word break.

Constructor Summary

Constructors

Constructor and Description
Options()

Method Summary

Methods inherited from class java.lang.Object

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

Field Detail

direction

public SWTTextDetector.Direction direction

The "direction" to perform the SWT

canny

public CannyEdgeDetector canny

The canny edge detector to use for the SWT.

doubleSize

public boolean doubleSize

Upscale the image to double size before applying the SWT.

strokeWidthRatio

public float strokeWidthRatio

Maximum allowed ratio of a pair of stroke widths for them to be considered part of the same connected component.

letterVarianceMean

public double letterVarianceMean

Maximum allowed variance of stroke width in a single character as a percentage of the mean.

maxAspectRatio

public double maxAspectRatio

Maximum allowed aspect ratio for a single letter

maxDiameterStrokeRatio

public double maxDiameterStrokeRatio

Maximum allowed ratio of diameter to stroke width for a single character.

minArea

public int minArea

Minimum allowed component size; used to quickly filter out small components.

minHeight

public float minHeight

Minimum character height

maxHeight

public float maxHeight

Maximum character height

maxNumOverlappingBoxes

public int maxNumOverlappingBoxes

Maximum allowed number of overlapping characters

maxStrokeWidth

public int maxStrokeWidth

Maximum allowed stroke width

medianStrokeWidthRatio

public float medianStrokeWidthRatio

Maximum ratio of stroke width for two letters to be considered to be related

letterHeightRatio

public float letterHeightRatio

Maximum ratio of height for two letters to be considered to be related

intensityThreshold

public float intensityThreshold

Maximum difference in intensity for two letters to be considered to be related

widthMultiplier

public float widthMultiplier

The width multiplier for two letters to be considered to be related. Distance between centroids must be less than widthMultiplier * maxLetterWidth.

minLettersPerLine

public int minLettersPerLine

Minimum number of allowed letters on a line

intersectRatio

public float intersectRatio

Ratio of vertical intersection for character pairing. This helps ensure that the characters are horizontal.

wordBreakdownRatio

public float wordBreakdownRatio

Ratio of the interclass std dev of the letter spacings to the mean to suggest a word break.

Constructor Detail

Options

public Options()