cn.apiclub.captcha.filter.image

类 TwirlFilter

java.lang.Object

cn.apiclub.captcha.filter.image.AbstractBufferedImageOp

cn.apiclub.captcha.filter.image.TransformFilter

cn.apiclub.captcha.filter.image.TwirlFilter

所有已实现的接口:

BufferedImageOp, Cloneable

public class TwirlFilter
extends TransformFilter

A Filter which distorts an image by twisting it from the centre out. The twisting is centred at the centre of the image and extends out to the smallest of the width and height. Pixels outside this radius are unaffected.

字段概要

从类继承的字段 cn.apiclub.captcha.filter.image.TransformFilter

BILINEAR, CLAMP, edgeAction, interpolation, NEAREST_NEIGHBOUR, originalSpace, RGB_CLAMP, transformedSpace, WRAP, ZERO

构造器概要

构造器

构造器和说明
TwirlFilter() Construct a TwirlFilter with no distortion.

方法概要

方法

限定符和类型	方法和说明
BufferedImage	filter(BufferedImage src, BufferedImage dst)
float	getAngle() Get the angle of twist.
Point2D	getCentre() Get the centre of the effect as a proportion of the image size.
float	getCentreX() Get the centre of the effect in the X direction as a proportion of the image size.
float	getCentreY() Get the centre of the effect in the Y direction as a proportion of the image size.
float	getRadius() Get the radius of the effect.
void	setAngle(float angle) Set the angle of twirl in radians. 0 means no distortion.
void	setCentre(Point2D centre) Set the centre of the effect as a proportion of the image size.
void	setCentreX(float centreX) Set the centre of the effect in the X direction as a proportion of the image size.
void	setCentreY(float centreY) Set the centre of the effect in the Y direction as a proportion of the image size.
void	setRadius(float radius) Set the radius of the effect.
String	toString()
protected void	transformInverse(int x, int y, float[] out) Inverse transform a point.

从类继承的方法 cn.apiclub.captcha.filter.image.TransformFilter

filterPixelsNN, getEdgeAction, getInterpolation, setEdgeAction, setInterpolation, transformSpace

从类继承的方法 cn.apiclub.captcha.filter.image.AbstractBufferedImageOp

clone, createCompatibleDestImage, getBounds2D, getPoint2D, getRenderingHints, getRGB, setRGB

从类继承的方法 java.lang.Object

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

构造器详细资料

TwirlFilter

public TwirlFilter()

Construct a TwirlFilter with no distortion.

方法详细资料

setAngle

public void setAngle(float angle)

Set the angle of twirl in radians. 0 means no distortion.

参数:

angle - the angle of twirl. This is the angle by which pixels at the nearest edge of the image will move.

另请参阅:

getAngle()

getAngle

public float getAngle()

Get the angle of twist.

返回:

the angle in radians.

另请参阅:

setAngle(float)

setCentreX

public void setCentreX(float centreX)

Set the centre of the effect in the X direction as a proportion of the image size.

参数:

centreX - the center

另请参阅:

getCentreX()

getCentreX

public float getCentreX()

Get the centre of the effect in the X direction as a proportion of the image size.

返回:

the center

另请参阅:

setCentreX(float)

setCentreY

public void setCentreY(float centreY)

Set the centre of the effect in the Y direction as a proportion of the image size.

参数:

centreY - the center

另请参阅:

getCentreY()

getCentreY

public float getCentreY()

Get the centre of the effect in the Y direction as a proportion of the image size.

返回:

the center

另请参阅:

setCentreY(float)

setCentre

public void setCentre(Point2D centre)

Set the centre of the effect as a proportion of the image size.

参数:

centre - the center

另请参阅:

getCentre()

getCentre

public Point2D getCentre()

Get the centre of the effect as a proportion of the image size.

返回:

the center

另请参阅:

setCentre(java.awt.geom.Point2D)

setRadius

public void setRadius(float radius)

Set the radius of the effect.

参数:

radius - the radius

另请参阅:

getRadius()

getRadius

public float getRadius()

Get the radius of the effect.

返回:

the radius

另请参阅:

setRadius(float)

filter

public BufferedImage filter(BufferedImage src,
                   BufferedImage dst)

指定者:

filter 在接口中 BufferedImageOp

覆盖:

filter 在类中 TransformFilter

transformInverse

protected void transformInverse(int x,
                    int y,
                    float[] out)

从类复制的说明: TransformFilter

Inverse transform a point. This method needs to be overriden by all subclasses.

指定者:

transformInverse 在类中 TransformFilter

参数:

x - the X position of the pixel in the output image

y - the Y position of the pixel in the output image

out - the position of the pixel in the input image

toString

public String toString()

覆盖:

toString 在类中 Object