File APIs for Java Developers
Manipulate DOC, XLS, PPT, PDF and many others from your application.
http://aspose.com/file-tools
The moose likes Other JSE/JEE APIs and the fly likes Image compression and decompression Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login
JavaRanch » Java Forums » Java » Other JSE/JEE APIs
Bookmark "Image compression and decompression" Watch "Image compression and decompression" New topic
Author

Image compression and decompression

Ruchika Verma
Greenhorn

Joined: Sep 19, 2008
Posts: 4
Hi,
I have compressed an image using ImageWriteParam class in ImageIO to reduce its size for image transfer. Now I want to decompress it. I urgently need the code to decompress the image. Please help.
Ulf Dittmer
Marshal

Joined: Mar 22, 2005
Posts: 42594
    
  65
Welcome to JavaRanch.

It's hard to say what might need to be done for decompression, since we don't know what you did for compression. What happens if you try to open the image with ImageIO.read ?


Ping & DNS - my free Android networking tools app
Rob Spoor
Sheriff

Joined: Oct 27, 2005
Posts: 19759
    
  20

In most cases it's not possible to decompress images. The reason is that the compression is lossy - it will remove part of the data which cannot be retrieved. Especially JPEG is quite lossy.

If you want lossless transfer, either change the image type or use a reversable compression algorithm like GZip.


SCJP 1.4 - SCJP 6 - SCWCD 5 - OCEEJBD 6
How To Ask Questions How To Answer Questions
Ruchika Verma
Greenhorn

Joined: Sep 19, 2008
Posts: 4
Ok. Thanks. But when I try to compress Tiff images with same lossy compression technique I get an exception. Can you share the code to compress Tiff image using lossy compression.
 
I agree. Here's the link: http://aspose.com/file-tools
 
subject: Image compression and decompression