The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 01, 1991
Filed:
Nov. 16, 1989
Hwai T Tai, Rochester, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
Methods and apparatus for interpolating existing gray-level pixel data to obtain new pixel values during image reduction and enlargement. A quadratic interpolation equation is used to apply location weighting factors to the density values of neighboring pixels. Edge strength modifying factors are used to modify the weighting factors in the x, y, and diagonal directions. In one embodiment, the modifying factors are set to greater than unity when the corresponding edge strength is greater than a predetermined threshold value. In another embodiment, the modifying factors are a non-linear function of the edge strength. These techniques preserve the sharpness of high contrast edges in the original image.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile