GrayFilter

java.lang.Object
- java.awt.image.ImageFilter
- - java.awt.image.RGBImageFilter
  - - com.twelvemonkeys.image.GrayFilter

All Implemented Interfaces:

java.awt.image.ImageConsumer, java.lang.Cloneable
```
public class GrayFilter
extends java.awt.image.RGBImageFilter
```
This class can convert a color image to grayscale.
Uses ITU standard conversion: (222 * Red + 707 * Green + 71 * Blue) / 1000.

Version:

$Id: //depot/branches/personal/haraldk/twelvemonkeys/release-2/twelvemonkeys-core/src/main/java/com/twelvemonkeys/image/GrayFilter.java#1 $

Field Summary

Fields
Modifier and Type Field Description

private int low

private float range
- Fields inherited from class java.awt.image.RGBImageFilter
  canFilterIndexColorModel, newmodel, origmodel
- Fields inherited from class java.awt.image.ImageFilter
  consumer
- Fields inherited from interface java.awt.image.ImageConsumer
  COMPLETESCANLINES, IMAGEABORTED, IMAGEERROR, RANDOMPIXELORDER, SINGLEFRAME, SINGLEFRAMEDONE, SINGLEPASS, STATICIMAGEDONE, TOPDOWNLEFTRIGHT

Constructor Summary

Constructors
Constructor	Description
`GrayFilter()`	Constructs a GrayFilter using ITU color-conversion.
`GrayFilter(float pLow, float pHigh)`	Constructs a GrayFilter using ITU color-conversion, and a dynamic range between pLow and pHigh.
`GrayFilter(int pLow, int pHigh)`	Constructs a GrayFilter using ITU color-conversion, and a dynamic range between pLow and pHigh.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`int`	`filterRGB(int pX, int pY, int pARGB)`	Filters one pixel using ITU color-conversion.

Methods inherited from class java.awt.image.RGBImageFilter
filterIndexColorModel, filterRGBPixels, setColorModel, setPixels, setPixels, substituteColorModel

Methods inherited from class java.awt.image.ImageFilter
clone, getFilterInstance, imageComplete, resendTopDownLeftRight, setDimensions, setHints, setProperties

Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - low
```
private int low
```
  - range
```
private float range
```
- Constructor Detail
  - GrayFilter
```
public GrayFilter()
```
    Constructs a GrayFilter using ITU color-conversion.
  - GrayFilter
```
public GrayFilter(float pLow,
                  float pHigh)
```
    Constructs a GrayFilter using ITU color-conversion, and a dynamic range between pLow and pHigh.
    
    Parameters:
    
    pLow - float in the range 0..1
    
    pHigh - float in the range 0..1 and >= pLow
  - GrayFilter
```
public GrayFilter(int pLow,
                  int pHigh)
```
    Constructs a GrayFilter using ITU color-conversion, and a dynamic range between pLow and pHigh.
    
    Parameters:
    
    pLow - integer in the range 0..255
    
    pHigh - integer in the range 0..255 and >= pLow
- Method Detail
  - filterRGB
```
public int filterRGB(int pX,
                     int pY,
                     int pARGB)
```
    Filters one pixel using ITU color-conversion.
    
    Specified by:
    
    filterRGB in class java.awt.image.RGBImageFilter
    
    Parameters:
    
    pX - x
    
    pY - y
    
    pARGB - pixel value in default color space
    
    Returns:
    
    the filtered pixel value in the default color space