Module imagingbook.common

Package imagingbook.common.image.interpolation

Class BilinearInterpolator

java.lang.Object

imagingbook.common.image.interpolation.BilinearInterpolator

All Implemented Interfaces:

PixelInterpolator

public class BilinearInterpolator
extends Object
implements PixelInterpolator

A PixelInterpolator implementing bilinear interpolation in 2D. See Sec. 22.5.2 of [1] for additional details.

[1] W. Burger, M.J. Burge, Digital Image Processing – An Algorithmic Introduction, 3rd ed, Springer (2022).

Constructor Summary

Constructors

Constructor	Description
BilinearInterpolator()	Constructor.

Method Summary

Modifier and Type	Method	Description
float	getInterpolatedValue(ScalarAccessor ia, double x, double y)	Returns the interpolated pixel value for the specified position.
double	getWeight(double x)	Corresponds to function w_lin(x), see Eqn.

Methods inherited from class java.lang.Object

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

Methods inherited from interface imagingbook.common.image.interpolation.PixelInterpolator

getWeight

Constructor Details

BilinearInterpolator

public BilinearInterpolator()

Constructor.

Method Details

getInterpolatedValue

public float getInterpolatedValue(ScalarAccessor ia,
 double x,
 double y)

Description copied from interface: PixelInterpolator

Returns the interpolated pixel value for the specified position.

Specified by:

getInterpolatedValue in interface PixelInterpolator

Parameters:

ia - a ScalarAccessor to the interpolated image

x - continuous interpolation position (horiz.)

y - continuous interpolation position (vert.)

Returns:

the interpolated pixel value at position (x,y).

getWeight

public double getWeight(double x)

Corresponds to function w_lin(x), see Eqn. 22.11 in [1]. TODO: test, not used currently.

Specified by:

getWeight in interface PixelInterpolator

Parameters:

x - the position relative to the interpolation point

Returns:

the weight for this position