com.googlecode.leptonica.android

Class Enhance

com.googlecode.leptonica.android.Enhance

public class Enhance

Image sharpening methods.

Field Detail

DEFAULT_UNSHARP_HALFWIDTH

public static int DEFAULT_UNSHARP_HALFWIDTH

See Also:

Constant Field Values

DEFAULT_UNSHARP_FRACTION

public static float DEFAULT_UNSHARP_FRACTION

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Constant Field Values

Method Detail

unsharpMasking

public static Pix unsharpMasking(Pix pixs)

Performs unsharp masking (edge enhancement) using default values.

Parameters:

pixs - Source image

Returns:

org.jetbrains.dokka.NodeRenderContent@560d08bd: an edge-enhanced Pix image or copy if no enhancement requested

See Also:

#unsharpMasking(Pix, int, float)

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:

pixs - The source image

halfwidth - The half-width of the smoothing filter.

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

Returns:

org.jetbrains.dokka.NodeRenderContent@503ec635: an edge-enhanced Pix image or copy if no enhancement requested