Adjustable Low-Pass Filter for Digital Cameras

Description

This invention allows a gradual change Modulation Transfer Function ( MTF ) in respect to high spatial frequency of an image on the camera’s solid state image sensor to suppress artifacts such as aliasing, moire and phantom color without reducing image quality. This low-pass filter is distinguished from predecessors in respect to the high quality of the optical parameters, the relative simplicity, low cost, and the ability to accommodate to existing components to the camera optical system without changing the length of optical path.

Advantages

• Eliminates moire when details with high spatial frequency in an image are present and can be turned off for maximum resolution when sources of moire are absent.
  
• Independence from size, shape and color configuration of pixels in solid state image sensor.

Potential Applications

• Can be used for retail and commercial use with a solid state image sensor in still digital cameras, video cameras, digital copiers, and can capture astronomical images.
  
• Can enhance surveillance cameras by making small details more realistic.

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Updated August 9, 2008

Inventors
Grigoriy Kreymermanm PhD.
Research Scientist
Imaging Technology Center

IP Status
U.S. Patent 6,356,379
Issued: 3/12/2002

Contact Information
Office of Technology Transfer
777 Glades Road
Boca Raton, FL 33431-0991

Kurt R. Moore
Assistant V.P. & Director
Ph: 561-297-1165
Fax: 561-297-2141
kmoore34@fau.edu

Michelle Webb
Assistant Director
Ph: 561-297-0673
Fax: 561-297-2141
mwebb18@fau.edu

Case Number
1998-04