Browse Prior Art Database

High Efficiency Image Compression

IP.com Disclosure Number: IPCOM000117930D
Original Publication Date: 1996-Jul-01
Included in the Prior Art Database: 2005-Mar-31
Document File: 2 page(s) / 40K

Publishing Venue

IBM

Related People

Cline, TL: AUTHOR [+3]

Abstract

There is a need in many domains to compress images as small as possible to minimize storage requirements.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 82% of the total text.

High Efficiency Image Compression

      There is a need in many domains to compress images as small as
possible to minimize storage requirements.

      An example where this is important is storing images of faces
on credit cards.  Credit card companies are starting to encode
pictures of card owners on the magnetic stripe on the back of credit
cards as a security measure.  The image is read at the same time as
the account number and is displayed on the cash register CRT where
the clerk verifies that the picture matches the person using the
card.  Compression algorithm currently in use encode a picture in as
little as 40 bytes.  Disadvantages are that the picture is very fuzzy
and it is desirable to take up less than 40 bytes so that other
information can be stored on the magnetic stripe.

      This invention encodes pictures as combinations of facial
characteristics.  There are a finite number of nose shapes, eye
colors, etc..  People can be uniquely characterized by the
combination of these characteristics which they possess.  This is
demonstrated by the identity kits used by many police departments to
construct drawings of criminals.  They chose from a set of features
and are able to construct a good likeness of a person.

      Each combination of features can be represented by a binary
number.  Four bytes can store over four billion combinations.  The
resulting picture will not be photorealistic, but will be easily
recognizable.  This should...