Browse Prior Art Database

System and Method of Displaying Transparent JPEG Images

IP.com Disclosure Number: IPCOM000130515D
Publication Date: 2005-Oct-25
Document File: 2 page(s) / 9K

Publishing Venue

The IP.com Prior Art Database

Abstract

There are two common types of image compression and formats used on the internet.

This text was extracted from a Microsoft Word document.
This is the abbreviated version, containing approximately 63% of the total text.

TRANSPARENT JPEG IMAGES

           

System and Method of Displaying Transparent JPEG Images

Disclosed Anonymously

There are two common types of image compression and formats used on the internet. 

A.  GIF and PNG-8 images use a color palette and are capable of efficiently encoding images with limited color information.  These image formats support the concept of transparent or semi-transparent images.

B.  JPEG images efficiently encode images with lots of color information by removing from photo-realistic images the redundant information that is not important to the perception of the human eye. JPEG images are lossy. JPEG image handlers do not commonly support the concept of transparency.

The problem is that if you have an image that contains photo-realistic color information and transparency, you are can't use JPEG compression because it doesn't support transparency and you are forced to use GIF or PNG which are less effective for these types of images. 

By splitting photo-realistic images into separate opaque and transparent components the opaque image data can be saved using a jpeg file format and the transparent data can be saved as a “png” file.

The image components can then be re-assembled when used without requiring support for a new image type. The device already supports the widely used JPEG and PNG formats.

The benefits of this type of compression are significant.  As an example, the T-Mobile theme contains photo-realistic application icons wit...