Divide an image in 4 blocks

[_kOws]

Hi,

I'm writing a program that loads an image and then apply JPEG
algorithm on it.
I need to apply such algorithm only to a quarter of the image, possibly
selecting which quarter.

I don't really know how to divide in quarter an image in Java: I think
that if I can divide the image in 4 images then I can use each image
as a quarter, and apply the algorithm as I'm doing now on the original
image.

Can someone help me?

Thank you very much, and sorry for my poor english!
Regards,

Gabriele

[Frank Stallone]

Re: Divide an image in 4 blocks

On Tue, 08 Apr 2008 16:19:07 +0200, _kOws wrote:

Hi,
>
I'm writing a program that loads an image and then apply JPEG algorithm
on it.
I need to apply such algorithm only to a quarter of the image, possibly
selecting which quarter.
>
I don't really know how to divide in quarter an image in Java: I think
that if I can divide the image in 4 images then I can use each image as
a quarter, and apply the algorithm as I'm doing now on the original
image.
>
Can someone help me?
>
Thank you very much, and sorry for my poor english! Regards,
>
Gabriele

I've never done it but I can't imagine it's impossible since you can do
it in PHP.

A quick search turned up this:

http://www.java-tips.org/java-se-tips/java.awt.image/how-to-crop-a-

subimage-from-an-image-9.html

You should be able to pull the necessary bits out from it for your own
purpose.