Color Look-Up Tables with Lossless Compression

Brief Description

Brief Description:

This image processing technology provides data compression for the color transformation tables which are embedded in printer firmware for optimal color printing.

Applications:

The concept is to be used in digital printing devices, such as color ink jet and color laser printers.  Color look-up tables provide transformation between various color spaces, such as device independent color spaces (CIELAB) and device-dependent color spaces (CMYK), which can depend on print media and artistic preferences.  These color look-up tables are embedded in printer hardware, typically on expensive flash memory.

Advantages:

The technique provides color look-up tables in a compressed form, with no compromise in quality.  The compression ratio achieved is 3.45.

Technology status:

There has been one publication:

S. R. A. Balaji, G. Sharma, M. Q. Shaw, and R. Guay, ?Hierarchical compression of color look up tables <http://www.ece.rochester.edu/~gsharma/papers/BalajiCLUTCompressCIC2008.pdf>,?  in Proc. IS&T/SID Fifteenth Color Imaging Conference: Color Science and Engineering: Systems, Technologies, Applications, Albuquerque, NM, 5-9 Nov. 2007, pp. 261-266.

Patent Information:
Title Country Patent No. Issued Date
Pre-Processing Methods for Improved Lossless Compression of Color Look-Up Tables United States 8,294,953 10/23/2012
Category(s):
Imaging
For Information, Contact:
John FahnerVihtelic
Senior Licensing Manager
University of Rochester
585.276.6600
john.fahner-vihtelic@rochester.edu
Inventors:
Gaurav Sharma
Aravindh Balaji Srinivasan Rajagopalan
Mark Shaw
Randall Guay
Keywords: