com.bbn.openmap.image
Class JPEGHelper

java.lang.Object
  |
  +--com.bbn.openmap.image.JPEGHelper

public class JPEGHelper

extends java.lang.Object

This class provides some utility methods for creating jpeg encoded images. It relies on the Sun JDK/SDK JPEG codec classes.

Method Summary

static byte[]	encodeJPEG(java.awt.image.BufferedImage image, float quality) Return a byte array that contains the JPEG encoded image.
static byte[]	encodeJPEG(int w, int h, int[] pixels, float quality) Return a byte array that contains the JPEG encoded image.
static void	main(java.lang.String[] args) A test main that encodes an image url at various jpeg quality factors.

Methods inherited from class java.lang.Object

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

Method Detail

encodeJPEG

public static byte[] encodeJPEG(java.awt.image.BufferedImage image,
                                float quality)
                         throws java.io.IOException

Return a byte array that contains the JPEG encoded image.

Parameters:

image - the image to encode

quality - the JPEG quality factor to use in encoding

Throws:

java.io.IOException - an error occured in encoding the image

encodeJPEG

public static byte[] encodeJPEG(int w,
                                int h,
                                int[] pixels,
                                float quality)
                         throws java.io.IOException

Return a byte array that contains the JPEG encoded image.

Parameters:

w - the width of the image

h - the height of the image

pixels - the array of pixels in RGB directcolor

quality - the JPEG quality factor to use in encoding

Throws:

java.io.IOException - an error occured in encoding the image

main

public static void main(java.lang.String[] args)
                 throws java.lang.Exception

A test main that encodes an image url at various jpeg quality factors.

Parameters:

args - url [width height]

java.lang.Exception