GreyImage (Starjava TTOOLS API)

Skip navigation links

All Classes

SEARCH:

Summary:
Nested |
Field |
Constr |
Method

Detail:
Field |
Constr |
Method

java.lang.Object
- uk.ac.starlink.ttools.plot2.layer.GreyImage

```
public class GreyImage
extends java.lang.Object
```
A greyscale image backed by a a byte buffer. The buffer is initially set to zero values, corresponding to white. Black corresponds to byte values of 255. Trial and error suggests that it is more efficient in time, though not in memory, to use greyscale than bitmap images (BufferedImage.TYPE_BYTE_BINARY), even if only bitmap type values are required.

Since:

26 Nov 2013

Author:

Mark Taylor

See Also:

GraphicsBitmap, RgbImage

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static GreyImage`	`createGreyImage(int width, int height)`	Factory method to create an instance.
`Pixer`	`createPixer()`	Returns a pixel iterator that iterates over all the pixels that have been altered (are non-white) in this image.
`byte[]`	`getBuffer()`	Returns the byte array backing the image.
`java.awt.image.BufferedImage`	`getImage()`	Returns the greyscale image.

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

- Method Detail
  - getImage
```
public java.awt.image.BufferedImage getImage()
```
    Returns the greyscale image.
    
    Returns:
    
    image
  - getBuffer
```
public byte[] getBuffer()
```
    Returns the byte array backing the image.
    
    Returns:
    
    byte array
  - createPixer
```
public Pixer createPixer()
```
    Returns a pixel iterator that iterates over all the pixels that have been altered (are non-white) in this image. In the current implementation this is not efficient to be re-used.
    
    Returns:
    
    iterator over non-white pixels
  - createGreyImage
```
public static GreyImage createGreyImage(int width,
                                        int height)
```
    Factory method to create an instance.
    
    Parameters:
    
    width - image width in pixels
    
    height - image height in pixels

Skip navigation links

All Classes

Summary:
Nested |
Field |
Constr |
Method

Detail:
Field |
Constr |
Method

Copyright © 2018 Central Laboratory of the Research Councils. All Rights Reserved.