Package qupath.lib.images.servers.transforms

Class SubtractOffsetAndScaleNormalizer

java.lang.Object

qupath.lib.images.servers.transforms.SubtractOffsetAndScaleNormalizer

All Implemented Interfaces:

BufferedImageOp, BufferedImageNormalizer

public class SubtractOffsetAndScaleNormalizer
extends Object
implements BufferedImageNormalizer

Normalizes the pixel values of a BufferedImage by subtracting and offset and multiplying by a scale factor.

An expected use is to subtract a constant background value in a fluorescence image, with optional channel rescaling.

Note that the result is necessarily clipped to the range of the output data type, and non-integer values are rounded if necessary.

Since:

v0.6.0

Method Summary

Modifier and Type	Method	Description
static SubtractOffsetAndScaleNormalizer	create(double[] offsets, double[] scales)	Create a normalizer that subtracts a constant from each channel, then multiples the result by a scale factor.
static SubtractOffsetAndScaleNormalizer	createScaled(double... scales)	Create a normalizer that scales each channel by a constant.
static SubtractOffsetAndScaleNormalizer	createSubtractOffset(double... offsets)	Create a normalizer that subtracts a constant from each channel, without clipping.
static SubtractOffsetAndScaleNormalizer	createSubtractOffsetAndClipZero(double... offsets)	Create a normalizer that subtracts a constant from each channel, clipping the lower bound to 0.
static SubtractOffsetAndScaleNormalizer	createWithClipRange(double[] offsets, double[] scales, double minClip, double maxClip)	Create a normalizer that subtracts a constant from each channel, then multiples the result by a scale factor - clipping the result to a defined range.
BufferedImage	filter(BufferedImage img, BufferedImage output)

Methods inherited from class java.lang.Object

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

Methods inherited from interface qupath.lib.images.servers.transforms.BufferedImageNormalizer

createCompatibleDestImage, getBounds2D, getPoint2D, getRenderingHints

Method Details

createScaled

public static SubtractOffsetAndScaleNormalizer createScaled(double... scales)

Create a normalizer that scales each channel by a constant.

Parameters:

scales -

Returns:

createSubtractOffset

public static SubtractOffsetAndScaleNormalizer createSubtractOffset(double... offsets)

Create a normalizer that subtracts a constant from each channel, without clipping.

Parameters:

offsets -

Returns:

createSubtractOffsetAndClipZero

public static SubtractOffsetAndScaleNormalizer createSubtractOffsetAndClipZero(double... offsets)

Create a normalizer that subtracts a constant from each channel, clipping the lower bound to 0.

Parameters:

offsets -

Returns:

create

public static SubtractOffsetAndScaleNormalizer create(double[] offsets,
 double[] scales)

Create a normalizer that subtracts a constant from each channel, then multiples the result by a scale factor. The result is not clipped.

Parameters:

offsets -

scales -

Returns:

createWithClipRange

public static SubtractOffsetAndScaleNormalizer createWithClipRange(double[] offsets,
 double[] scales,
 double minClip,
 double maxClip)

Create a normalizer that subtracts a constant from each channel, then multiples the result by a scale factor - clipping the result to a defined range.

Parameters:

offsets -

scales -

minClip -

maxClip -

Returns:

filter

public BufferedImage filter(BufferedImage img,
 BufferedImage output)

Specified by:

filter in interface BufferedImageOp