Hewlett-Packard Development Company, L.p.

Compaq Computer Corporation, Inc.

Lasersight Technologies, Inc.

Eyesys Technologies, Inc.

Eyesys-Premier, Inc.

Henry M D'Souza

Gokalp Bayramoglu

Edwin Jay Sarver

Valiuddin Y Ali

Youssef Salih Wakil

Paul A Ward

Mark L Reinke

William H Nott

Chia-Lin Chu

Tam Q Duong

Mark E Taylor

Larry W Kunkel

Curtis L Crisler

Daniel J Powers

Gary L Riechmann

Michael J Chroback

Alexander Gruzen

George R Pariza

A system for characterizing color is provided. The system includes a color patch identification system that receives image data, such as image data of a color wedge, and generates color patch data, such as for two or more patches that make up the color wedge. A color patch characterization system receives the color patch data and generates color density data, such as by calculating the average color density of each color patch.

Method and system for characterizing printer color

A method for controlling printer color is provided. The method includes receiving cartridge color density data, such as from analysis of a test patch printed by the cartridge, and reference cartridge data, such as from analysis of a test patch printed and measured in accordance with a color standard. The color density data of the cartridge test patch is then mapped to the color density data of the reference cartridge test patch to generate mapped color density data, such as a look-up table that provides a dot activation for the cartridge that generates the same color density for a known dot activation for the reference cartridge. The mapped color density data is then used to control color density for printing a set of image data.

Method and system for controlling printer color

A color correction filtering system filters color video data by compensating for non-linearities and color characteristics specific to a color monitor. Color video data is received by the system, for example through a web browser, and in an accelerated manner passed through a pre-calculated gamut-shifting array. The color correction filtering system gamma decompensates incoming color video data referenced to a non-linear color space through use of a linearization filter. The gamut-shifting array may contain pre-calculated compensation values stored in a plurality of look-up tables. A non-linearization filter is applied to the gamut-shifted color video data to produce color video data compensated for non-linearities specific to the color monitor.

Software-based acceleration color correction filtering system

A hardware-implemented color video data correction filtering system includes a plurality of linearization tables to gamma decompensate input color video data referenced to a non-linear color space, a plurality of a set of pre-calculated gamut shifting arrays to compensate for color point data of a plurality of constituent colors of a color monitor with each set of pre-calculated gamut shifting arrays coupled to one linearization table of the plurality of linearization tables, a plurality of hardware adders with each hardware adder coupled to one of the set of pre-calculated gamut shifting arrays, and a plurality of non-linearization tables coupled to the plurality of hardware adders to compensate for non-linearities of the color monitor and produce output color video data compensated for non-linearities and color points of the color monitor. Color video data is corrected in an accelerated manner through use of the pre-calculated gamut shifting arrays.

Hardware-based accelerated color correction filtering system

Disclosed is a method and apparatus for controlling color displayed on a color monitor. The method includes, in one embodiment, the steps of: activating a first color scheme on the monitor; responsive to the activating of the first color scheme, measuring a first color point of the monitor; storing the first color point within a memory associated with the monitor; activating a second color scheme on the monitor; responsive to the activating of the second color scheme, measuring a second color point of the monitor; storing the second color point within the memory associated with the monitor; activating a third color scheme on the monitor; responsive to the activating of the third color scheme, measuring a third color point of the monitor; and storing the third color point within the memory associated with the monitor.

Method for color management on a display device

A system provides automatic mode detection and scaler control in a display device which is digitally coupled to a display controller. The display controller has a variable active horizontal resolution and a variable active vertical resolution, while the display device has a fixed display device horizonal resolution and a fixed display device vertical resolution. The system determines the variable active horizontal and the vertical resolutions of the display controller; and scales the output of the display controller to the fixed horizontal resolution and vertical resolution of the display device.

Automatic resolution detection

Color display system

A system for compensating for non-functional ink cartridge ink jet nozzles is provided. The system includes an ink jet compensation system that receives ink jet nozzle failure data, such as each nozzle that is clogged or damaged, and that generates nozzle correction data, such as a nozzle to fire instead of each failed nozzle for a given print pattern or a nozzle firing sequence that compensates for the failed nozzle, such as by printing at that location during a subsequent or previous printer head pass. An ink control system receives the nozzle correction data and image data and generates printer control data, such as by receiving image data in a standard format for printing and modifying the printer control data that would be generated if all ink jet heads were functioning properly to include the nozzle correction data.

System and method for compensating for non-functional ink cartridge ink jet nozzles

A system selects either a first scaler in a host computer or a second scaler in a display device, the first scaler having a predetermined output quality. The system instructs the display device to render a pattern; determines the output quality of the second scaler; and compares the quality of the second scaler with the predetermined output quality and selects the scaler with higher quality.

Automatic scaler mode detection

A computer system is disclosed for providing rapid access to preconfigured Internet sites. The system includes a keyboard or similar input device having switches which are closed to produce unique Internet access signals. A signal processing circuit places the computer system in communication with corresponding unique Internet sites in response to the Internet access signals. Application software is also launched as required by the particular access switch, such as for electronic commerce or electronic messaging. If the system is not yet logged onto the network, a log-on routine is executed in response to the access signals. A user may actuate the switches to rapidly access desired Internet sites and to perform operations at the sites without the need to navigate through a series of on-screen windows or menus.

Rapid network access computer system

A input device, such as a keyboard, having an array of unique rapid response keys for responding rapidly and conveniently to routine requests from software applications. Such routine requests include those requiring a &ldquo;yes,&rdquo; &ldquo;no&rdquo; or &ldquo;cancel&rdquo; response. Other routine tasks includes saving and closing files, which typically causes software to issue a save request. Instead of responding to such requests with input from a pointing device, the unique rapid response keys allow a user to respond to such routine requests without removing her hands from the keyboard. Four dedicated keys are preferably located above an escape key on the keyboard. A device driver receives scan codes from the keyboard and translates the scan codes corresponding to the response keys for providing a properly formatted response to the requesting software application.

Method and apparatus for rapidly responding to routine software requests

A method for analysis of the curvature of the surface of a cornea using a checkered placido comprises, projecting the image of the checkered placido onto a patient's cornea, detecting the image of the checkered placido reflected off of the cornea, detecting a plurality of nodal points from the reflected image, determining the mean curvature at a plurality of nodal points and analyzing the mean curvature at a plurality of nodal points in order to produce a graphic display of the estimated actual curvature of the cornea.

Method of corneal analysis using a checkered placido apparatus

A system positions an image with a plurality of lines on a display device. The system determines the number of black lines required to vertically center the image in a frame of the display device as m&plus;n; displays m black lines using a first horizontal sync period at the start of each frame, the first horizontal sync period being less than the horizontal sync period of the display device; displays each line of the image; and displays n black lines using the second horizontal sync period until the end of the frame.

Low bandwidth display mode centering for flat panel display controller

A computer system includes a monitor having a universal serial bus (USB) interface for connecting with a base system. Multiple button and LED controls are conveniently placed on a front bezel of the monitor. As the buttons are actuated, commands are passed to the base system via the USB. An on-screen display button causes an application to be launched on the base system for modifying screen attributes stored in a monitor controller in the monitor. A USB controller in the monitor updates the monitor controller via the USB. A multifunction audio dial is toggled by a bezel button between volume, bass and treble functions. The USB controller is also operable to provide a sustain a blinking LED even while the base system is in a sleep mode. LEDs on the front bezel indicate monitor and base system power status.

Growing community of inventors

Cypress, TX, United States of America

Henry M D'Souza