Computer graphics system and process for adaptive supersampling
Generally, computer graphics systems represent dynamic images by displaying data on the screen of a cathode ray tube (CRT). Typically, the CRT screen displays a rectangular array of thousands of indiv... Read More
Inventors: Cosman, Michael A.;, Assignee: Evans & Sutherland Computer Corporation (Salt Lake City, UT) |
Anisotropic texture mapping using silhouette/footprint analysis in a computer image generation system
In accordance with the invention, a method for anisotropically mapping texture information to each pixel required for display of each of plural polygons forming each scene on a CIG display in a comput... Read More
Inventors: Lee, Harry Charles;, Assignee: Real 3D, Inc. (Orlando, FL) |
Techniques for anisotropic texture mapping using multiple space-invariant filtering operations per pixel
The present invention relates to a method and a computer system for applying a texture image to an object when rendering the object on a display device. The texture image is stored at varying levels o... Read More
Inventors: Perry, Ronald; Jouppi, Norman P.; McCormack, Joel J.; Farkas, Keith Istvan;, Assignee: Compaq Computer Corporation (Houston, TX) |
Image processing apparatus and method for converting data dependent on a first illuminating light into data dependent on a second illuminating light
An object of the present invention is to obtain data under desired illumination in a simple manner with a limited memory capacity. The above-mentioned object can be attained, according to the present ... Read More
Inventors: Shiraiwa, Yoshinobu; Mizuno, Toshiyuki; Ohsaki, Yumiko;, Assignee: Canon Kabushiki Kaisha (Tokyo, JP) |
Method and apparatus for delta row decompression
I claim: 1. A circuit for decompressing delta row compressed data, having command data bytes containing information as to the location and number of replacement data bytes, and replacement data bytes,... Read More
Inventors: Vondran, Jr., Gary L.;, Assignee: Hewlett-Packard Company (Palo Alto, CA) |
Inkjet printing: mask-rotation-only at page extremes; multipass modes for quality and throughput on plastic media
OF THE PREFERRED EMBODIMENTS 1. STEEPER DIAGONAL The print mask of the present invention forms diagonal lines that are skewed more toward the printing-medium advance direction than those of prior-art... Read More
Inventors: Cleveland, Lance; Hall, Corrina A. E.; Hilliard, William C.;, Assignee: Hewlett-Packard Company (Palo Alto, CA) |
Page printer controller
An object of the invention is to improve the page printer controller's processing time by increasing the controller's processing speed while concurrently operating the respective processors. The above... Read More
Inventors: Masubuchi, Masaki; Kikuchi, Asahiko; Shimizu, Hitomi;, Assignee: Hitachi Koki Co., Ltd. (Tokyo, JP) |
Shared decompression buffer
It is an object of the present invention to provide an improved compression/decompression system. It is a further object of the present invention to provide a compression/decompression system with red... Read More
Inventors: Chu, Ke-Chiang; Agnoli, Giovanni M.; Aitken, Kevin B.;, Assignee: Apple Computer, Inc. (Cupertino, CA) |
System for clearing an image data buffer in a high-speed digital printing apparatus
OF THE INVENTION The FIGURE is a systems diagram showing the essential elements of the present invention, within the context of a digital printing apparatus. In the system shown, the basic input is o... Read More
Inventors: Plakosh, David;, Assignee: Xerox Corporation (Stamford, CT) |
System and method for accelerated data recompression
The present invention fulfills the above-described and other needs by providing a data recompression system which does not need to swap an entire uncompressed image to and from main memory during each... Read More
Inventors: Chen, Kok S.; Karlsson, Magnus; Nguyen, Hungviet H.;, Assignee: Apple Computer, Inc. (Cupertino, CA) |
Random printmasks in a multilevel inkjet printer
" section of this document. In preferred embodiments of a second of its aspects, the invention is apparatus for printing a color image on a printing medium, by construction from individual inkdrops fo... Read More
Inventors: Chang, Michael Ming Hsin; Bockman, Francis Edward;, Assignee: Hewlett-Packard Company (Palo Alto, CA) |
Data compression method and apparatus and data expansion method and apparatus
Accordingly, it is an object of the present invention to provide a data compression method and apparatus capable of compressing image data by increasing a compression rate by applying a run length met... Read More
Inventors: Aichi, Takao;, Assignee: Canon Kabushiki Kaisha (Tokyo, JP) |
Optical system for a large depth-of-field bar code scanner
OF THE INVENTION A simplified diagram illustrating the optical principal of the optical system of the invention is shown in FIG. 2. The lens 21 forms an image 25a of a photodetector array 25 that def... Read More
Inventors: Bayley, Brian J.; Brosnan, Michael J.; Hochgraf, Neil;, Assignee: Hewlett-Packard Company (Palo Alto, CA) |
Low differential light level photoreceptors
Circuitry is employed to provide a two-step improvement to acquiring a sufficient signal-to-noise ratio in photoelement applications requiring small light intensity differentiation. Firstly, the circu... Read More
Inventors: Baumgartner, Richard A.; Blalock, Travis N.; Hornak, Thomas; Doernberg, Joey;, Assignee: Hewlett-Packard Company (Palo Alto, CA) |
Freehand image scanning device which compensates for non-linear color movement
A scanning device and method for forming a scanned electronic image include using navigation information that is acquired along with image data, and then rectifying the image data based upon the navig... Read More
Inventors: Allen, Ross R.; Beard, David; Smith, Mark T.; Tullis, Barclay J.;, Assignee: Hewlett-Packard Company (Palo Alto, CA) |
Scanning mouse for a computer system
A solution to the problem of low cost convenient scanning is replacing a conventional mechanical mouse with an optical counterpart augmented to also scan documents. The augmentation includes equipping... Read More
Inventors: Knee, Derek L.; Davis, Bradley K.;, Assignee: Hewlett-Packard Company (Palo Alto, CA) |
Low latency architecture for spatial filtration
These and other objects, features and technical advantages are achieved by a spatial filter in which coefficients are selected to have a numerical value and distribution so as to improve performance i... Read More
Inventors: Anderson, Mark A.;, Assignee: Hewlett-Packard Company (Palo Alto, CA) |
Determining a point correspondence between two points in two respective (fingerprint) images
The present invention is a computer system for determining a point correspondence between two points in two respective images. A first image has one or more first points and each of the first points l... Read More
Inventors: Jain, Anil K.; Hong, Lin; Bolle, Rudolf Maarten; Pankanti, Sharathchandra Umapathirao;, Assignee: International Business Machines Corporation (Armonk, NY) |
Electronic shutter for a low differential light level photo-receiver cell
Circuitry is employed to provide an improvement to a system for acquiring a sufficient signal-to-noise ratio in photoelement applications requiring small light intensity differentiation. Specifically,... Read More
Inventors: Knee, Derek L.; Misek, Brian J.;, Assignee: Agilent Technologies (Palo Alto, CA) |
Operator input device
An operator input device is configured to provide position information based on relative movement of the operator input device and surface. The operator input device includes a pattern detector which ... Read More
Inventors: Adan, Manolito E.; Aoyagi, Tetsuji; Holmdahl, Todd E.; Lipscomb, Terry M.; Miura, Takeshi;, Assignee: Microsoft Corporation (Redmond, WA) |
Navigation system for handheld scanner
A method and apparatus are provided for efficiently obtaining navigational position of a sensor array based on a correlation between images captured by the sensor array at successive points in time. T... Read More
Inventors: Beausoleil, Jr., Raymond G.; Allen, Ross R.;, Assignee: Hewlett-Packard Company (Palo Alto, CA) |
Image scanning device and method
According to the present invention we provide a method of reconstructing an image captured as image data in a sensor and position data in a navigation means, comprising: defining a pixel grid for all ... Read More
Inventors: Pollard, Stephen Bernard; Kahn, Richard Oliver;, Assignee: Hewlett-Packard Company (Palo Alto, CA) |
Edge to edge image sensor and navigator for portable scanner
What is claimed is: 1. A portable scanner, comprising: a first image detector; a second image detector placed in spaced apart relation to said first image detector; and a plurality of position detecto... Read More
Inventors: Oliver, Thomas C.; Rohn, David C.; Miksch, Eugene A.;, Assignee: Hewlett-Packard Company (Palo Alto, CA) |
System and method for determining block direction in fingerprint images
The present invention is a system and method for determining an optimal block size in an area of an image, e.g., a fingerprint image, to obtain a reliable estimate of image pixel (fingerprint ridge) o... Read More
Inventors: Jain, Anil K.; Hong, Lin; Bolle, Rudolf Maarten; Pankanti, Sharathchandra Umapathirao;, Assignee: International Business Machines Corporation (Armonk, NY) |
Determining an alignment estimation between two (fingerprint) images
The invention is a system and method for estimating the values of alignment parameters (rotation angle and translation vector) between two two-dimensional images. A first image has one or more first p... Read More
Inventors: Jain, Anil K.; Hong, Lin; Bolle, Rudolf Maarten; Pankanti, Sharathchandra Umapathirao;, Assignee: International Business Machines Corporation (Armonk, NY) |
Finger movement detection method and apparatus
It is an object of the present invention to provide a specific method and specific configuration of an apparatus for detecting the finger movement from a fingerprint image. In order to achieve the abo... Read More
Inventors: Nishikawa, Shou;, Assignee: Fujitsu Limited (Kawasaki, JP) |
Color display apparatus and method of coding a color image
Another way of measuring the limitations of the HVS is to assess its ability to detect small targets against a background. This is referred to as the "target model" and is especially favoured by those... Read More
Inventors: Cowlishaw, Michael F.;, Assignee: International Business Machines Corporation (Armonk, NY) |
Apparatus for manipulating image pixel streams to generate an output image pixel stream in response to a selected mode
It is, therefore, an object of the present invention to provide apparatus for combining streams of data. It is another, more specific object of the present invention, to provide apparatus for combinin... Read More
Inventors: Drako, Dean M.; Yu, Hsiu-Tung A.;, Assignee: Apple Computer, Inc. (Cupertino, CA) |
System and method for automatically spacing characters
OF A PREFERRED EMBODIMENT OF THE INVENTION While the present invention may advantageously be implemented on nearly any conventional data processing system, exemplary data processing system 1500 on wh... Read More
Inventors: Spells, III, Henry D.;, Assignee: Macromedia, Inc. (San Francisco, CA) |
Method for producing visually evenly spaced typographic characters
The display of contrast-controlled grayscale characters produces the best results if each individual character is adequatly rendered and, if necessary, stored as a character pixmap image for further ... Read More
Inventors: Hersch, Roger D.; Betrisey, Claude;, Assignee: Ecole Polytechnique Federale Lausanne (EPFL) (Lausanne, CH) |
Image Analysis 
