com.googlecode.leptonica.android

Class Enhance

java.lang.Object

com.googlecode.leptonica.android.Enhance

public class Enhance
extends Object

Image sharpening methods.

Author:

alanv@google.com (Alan Viverette)

Constructor Summary

Constructors

Constructor and Description
Enhance()

Method Summary

Methods

Modifier and Type	Method and Description
static Pix	unsharpMasking(Pix pixs, int halfwidth, float fraction) Performs unsharp masking (edge enhancement).

Methods inherited from class java.lang.Object

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

Constructor Detail

Enhance

public Enhance()

Method Detail

unsharpMasking

public static Pix unsharpMasking(Pix pixs,
                 int halfwidth,
                 float fraction)

Performs unsharp masking (edge enhancement).

Notes:

• We use symmetric smoothing filters of odd dimension, typically use sizes of 3, 5, 7, etc. The halfwidth parameter for these is (size - 1)/2; i.e., 1, 2, 3, etc.
• The fract parameter is typically taken in the range: 0.2 < fract < 0.7

Parameters:

halfwidth - The half-width of the smoothing filter.

fraction - The fraction of edge to be added back into the source image.

Returns:

an edge-enhanced Pix image or copy if no enhancement requested