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:
Jan. 24, 1995
Filed:
Jun. 01, 1992
Jennifer C Loveridge, North Harrow, GB;
Eastman Kodak Company, Rochester, NY (US);
Abstract
A median filter is modified for temporal suppression of image grain in a time-varying sequence of images. Successive sets of samples are produced by operation of a sample producer (20), each set including a current sample, a sample delayed by a framestore (50), and a sample derived from a recursive component generator (60). A median selector (80) operates upon each set to select the median sample value. Either the median value or the current sample is selected for the filter output, dependent upon an interframe magnitude generated by an adaptive component generator (30). Evaluation of interframe magnitude minimizes artifacts in the reproduction of picture information that is temporarily impulsive, while including the recursive component in the median sample set increases the level of grain suppression.