1
Matthew D Gaubatz, Robert A Ulichney: System and method for automatically detecting and correcting red eye. Hewlett Packard Development Company, December 26, 2006: US07155058 (82 worldwide citation)

A system and method automatically detects and corrects the occurrence of red-eye in digital photographs and images without user intervention. The system includes a face recognition and locator engine for locating human faces within the image and for generating a bounding box around each face. A red- ...


2
Robert A Ulichney: Method and apparatus for mapping a digital color image from a first color space to a second color space. Digital Equipment Corporation, Kenyon & Kenyon, August 3, 1993: US05233684 (82 worldwide citation)

A method and apparatus including two look-up operations in two series coupled look-up tables coupled to an output of a dynamic quantization device to provide on-line representation mapping of digital color data from a first color space to a second color space.


3
Robert A Ulichney: System for producing dithered images from continuous-tone image data. Digital Equipment Corporation, Fish & Richardson, September 4, 1990: US04955065 (52 worldwide citation)

A digital image processing system for converting continuous tone pixel values representing an image into halftone or dithered pixel values, with the dithered pixel values representing each pixel having fewer bits than are used to represent each pixel in the continuous tone image. The continuous tone ...


4
Robert A Ulichney: Void and cluster apparatus and method for generating dither templates. Digital Equipment Corporation, Lindsay G McGuinness, Denis G Maloney, Arthur W Fisher, July 9, 1996: US05535020 (49 worldwide citation)

An apparatus for dithering an input image to produce an output array for representation on an output device is described. The apparatus includes an input device to store input image pixels having a first plurality of chrominance or luminance levels; a dithering system including a dither template inc ...


5
Robert A Ulichney, Himanshu Arora: System and method for increasing projector amplitude resolution and correcting luminance non-uniformity. Hewlett Packard Development Company, July 26, 2005: US06921172 (26 worldwide citation)

A system and method corrects luminance non-uniformity and increases the apparent amplitude resolution of an image generated by a projector. The projector, which has a given number of stated levels, receives input data and projects images based on that input data. To correct luminance non-uniformity, ...


6
Patrick D Charles, Robert S McNamara, Robert A Ulichney: Input modification system for multilevel dithering. Digital Equipment Corporation, Lindsay G McGuinness, Denis G Maloney, Arthur W Fisher, February 11, 1997: US05602941 (24 worldwide citation)

This disclosure relates to an image processing system which relies upon quantization and dithering techniques to enable an output device, which has a given number of output levels, to accurately reproduce a image which is generated by an input device, which has a greater or equal number of input lev ...


7
Robert A Ulichney: Imaging system with multilevel dithering using two memories. Albert P Cefalo, Ronald C Hudgens, Barry N Young, July 26, 1994: US05333262 (13 worldwide citation)

Disclosed is an image processing system which relies upon quantization and dithering techniques to enable an output device, which has a given number of output levels, to accurately reproduce a image which is generated by an input device, which has a greater or equal number of input levels. Generally ...


8
Robert A Ulichney: Imaging system with multilevel dithering using bit shifter. Digital Equipment Corporation, Albert P Cefalo, Ronald C Hudgens, Barry N Young, July 26, 1994: US05333260 (11 worldwide citation)

Disclosed is an image processing system which relies upon quantization and dithering techniques to enable an output device, which has a given number of output levels, to accurately reproduce a image which is generated by an input device, which has a greater or equal number of input levels. Generally ...


9
Robert A Ulichney, Shiufun Cheung: Bit-depth increase by bit replication. Digital Equipment Corporation, Jenkens & Gilchrist, March 14, 2000: US06038576 (11 worldwide citation)

A method for bit-depth increasing digital data represented by a first number of original bits which are sequentially ordered beginning with a start bit and ending with an end bit. To bit-depth increase the data, in an expanded presentation, the original bits are replicated in the sequential order st ...


10
Robert A Ulichney, William I Hallahan: Method and apparatus for providing 64-bit YUV to RGB color conversion. Compaq Computer Corporation, Edwin H Paul Esq, Cesari and McKenna, November 26, 2002: US06487308 (9 worldwide citation)

A method of providing conversion from YUV signals to RGB signals includes the steps of determining a correspondence value between each of the Y, U, and V pixel values and the corresponding one of the R, G, and B pixel values. Three tables are generated; a Y table, a U table and a V table. During ope ...