how to transform images and save them?

[angelinehelena]

I'm new to Java Advanced Imaging. I want to apply some geometric transformations to 2 separate images (JPEG) and then concatenate these 2 images. I encounter these problems.
(1) I applied these transformations and obtained RenderedOp images. I do not know how to write these as JPEG image files.

(2) when applying rotation to images, it produces a black background. Can i change this background?

Can anyone help plz?

[toadaly]

Use ImageIO to write them as jpeg, but you'll have to convert the RenderedOp images to BufferedImages first.

Use the copyData method to get a WritableRaster from your RenderedOp. You can then construct a java.awt.image.BufferedImage directly from that, and then call javax.imageio.ImageIO.write(....) with your BufferedImage to write it out as a jpeg file.

Don't know about the background....