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:
Jul. 17, 2001
Filed:
Sep. 28, 1998
Teruhiko Matsuoka, Sakura, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
An original image containing different kinds of components-areas is adaptively processed by applying interpolating methods suitably selected for respective areas. The processing method comprises the steps of extracting data of a partial image from data of a multi-gradation original image (STEP,), converting the partial image data into frequency data by using a frequency transformation matrix (e.g., the same size DCT) and storing the transformed data as coefficients of the matrix (STEP,), calculating a mean of absolute values of the coefficients for each frequency domain (STEP,), discriminating whether the partial image contains an edge portion by applying the mean coefficient value to conditional equations (STEP,), selecting a filter for surface interpolation or linear interpolation on the basis of the discrimination result (STEP,) and interpolating the data of the partial image (STEP,).