boofcv.alg.enhance

Class EnhanceImageOps

java.lang.Object

boofcv.alg.enhance.EnhanceImageOps

public class EnhanceImageOps
extends Object

Operations for improving the visibility of images.

See [1] for a discussion of algorithms found in this class.

[1] R. C. Gonzalez, R. E. Woods, "Digitial Image Processing" 2nd Ed. 2002

Author:

Peter Abeles

Constructor Summary

Constructors

Constructor and Description
EnhanceImageOps()

Method Summary

Methods

Modifier and Type	Method and Description
static void	applyTransform(ImageSInt16 input, int[] transform, int minValue, ImageSInt16 output) Applies the transformation table to the provided input image.
static void	applyTransform(ImageSInt32 input, int[] transform, int minValue, ImageSInt32 output) Applies the transformation table to the provided input image.
static void	applyTransform(ImageSInt8 input, int[] transform, int minValue, ImageSInt8 output) Applies the transformation table to the provided input image.
static void	applyTransform(ImageUInt16 input, int[] transform, ImageUInt16 output) Applies the transformation table to the provided input image.
static void	applyTransform(ImageUInt8 input, int[] transform, ImageUInt8 output) Applies the transformation table to the provided input image.
static void	equalize(int[] histogram, int[] transform) Computes a transformation table which will equalize the provided histogram.
static void	equalizeLocal(ImageUInt16 input, int radius, ImageUInt16 output, int[] histogram, int[] transform) Equalizes the local image histogram on a per pixel basis.
static void	equalizeLocal(ImageUInt8 input, int radius, ImageUInt8 output, int[] histogram, int[] transform) Equalizes the local image histogram on a per pixel basis.
static void	sharpen4(ImageFloat32 input, ImageFloat32 output) Applies a Laplacian-4 based sharpen filter to the image.
static void	sharpen4(ImageUInt8 input, ImageUInt8 output) Applies a Laplacian-4 based sharpen filter to the image.
static void	sharpen8(ImageFloat32 input, ImageFloat32 output) Applies a Laplacian-8 based sharpen filter to the image.
static void	sharpen8(ImageUInt8 input, ImageUInt8 output) Applies a Laplacian-8 based sharpen filter to the image.

Methods inherited from class java.lang.Object

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

Constructor Detail

EnhanceImageOps

public EnhanceImageOps()

Method Detail

equalize

public static void equalize(int[] histogram,
            int[] transform)

Computes a transformation table which will equalize the provided histogram. An equalized histogram spreads the 'weight' across the whole spectrum of values. Often used to make dim images easier for people to see.

Parameters:

histogram - Input image histogram.

transform - Output transformation table.

applyTransform

public static void applyTransform(ImageUInt8 input,
                  int[] transform,
                  ImageUInt8 output)

Applies the transformation table to the provided input image.

Parameters:

input - Input image.

transform - Input transformation table.

output - Output image.

applyTransform

public static void applyTransform(ImageUInt16 input,
                  int[] transform,
                  ImageUInt16 output)

Applies the transformation table to the provided input image.

Parameters:

input - Input image.

transform - Input transformation table.

output - Output image.

applyTransform

public static void applyTransform(ImageSInt8 input,
                  int[] transform,
                  int minValue,
                  ImageSInt8 output)

Applies the transformation table to the provided input image.

Parameters:

input - Input image.

minValue - Minimum possible pixel value.

transform - Input transformation table.

output - Output image.

applyTransform

public static void applyTransform(ImageSInt16 input,
                  int[] transform,
                  int minValue,
                  ImageSInt16 output)

Applies the transformation table to the provided input image.

Parameters:

input - Input image.

minValue - Minimum possible pixel value.

transform - Input transformation table.

output - Output image.

applyTransform

public static void applyTransform(ImageSInt32 input,
                  int[] transform,
                  int minValue,
                  ImageSInt32 output)

Applies the transformation table to the provided input image.

Parameters:

input - Input image.

minValue - Minimum possible pixel value.

transform - Input transformation table.

output - Output image.

equalizeLocal

public static void equalizeLocal(ImageUInt8 input,
                 int radius,
                 ImageUInt8 output,
                 int[] histogram,
                 int[] transform)

Equalizes the local image histogram on a per pixel basis.

Parameters:

input - Input image.

radius - Radius of square local histogram.

output - Output image.

histogram - Storage for image histogram. Must be large enough to contain all possible values.

transform - Storage for transformation table. Must be large enough to contain all possible values.

equalizeLocal

public static void equalizeLocal(ImageUInt16 input,
                 int radius,
                 ImageUInt16 output,
                 int[] histogram,
                 int[] transform)

Equalizes the local image histogram on a per pixel basis.

Parameters:

input - Input image.

radius - Radius of square local histogram.

output - Output image.

histogram - Storage for image histogram. Must be large enough to contain all possible values.

transform - Storage for transformation table. Must be large enough to contain all possible values.

sharpen4

public static void sharpen4(ImageUInt8 input,
            ImageUInt8 output)

Applies a Laplacian-4 based sharpen filter to the image.

Parameters:

input - Input image.

output - Output image.

sharpen4

public static void sharpen4(ImageFloat32 input,
            ImageFloat32 output)

Applies a Laplacian-4 based sharpen filter to the image.

Parameters:

input - Input image.

output - Output image.

sharpen8

public static void sharpen8(ImageUInt8 input,
            ImageUInt8 output)

Applies a Laplacian-8 based sharpen filter to the image.

Parameters:

input - Input image.

output - Output image.

sharpen8

public static void sharpen8(ImageFloat32 input,
            ImageFloat32 output)

Applies a Laplacian-8 based sharpen filter to the image.

Parameters:

input - Input image.

output - Output image.