Color Look-Up Tables with Lossless Compression

Brief Description:

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


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.


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 <>,”  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.

URV Reference Number: 2-11144-08001
Patent Information:
Title Country Patent No. Issued Date
Lossless Compression of Color Look-up Table via Hierarchical Differential Encoding or Cellular Interpolative Prediction United States 8,294,953 10/23/2012
For Information, Contact:
McKenna Geiger
Licensing Manager
University of Rochester
Gaurav Sharma
Aravindh Balaji Srinivasan Rajagopalan
Mark Shaw
Randall Guay