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:
May. 23, 2006
Filed:
Nov. 13, 2002
Tatsuhiko Yamazaki, Kanagawa, JP;
Tatsuhiko Yamazaki, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A median filter using an M×N window sorts M×N pixel data along each column in descending order to generate N data strings, each having M sorted pixel data. The N data strings are sequentially stored in a shift register. Data strings in different stages of the shift register are merged with one another in descending order to generate a new sorted data string. Such sorted data strings are again merged with each other to generate a data string having M×(N−1) sorted data. M+1 data surrounding the median value of the data string are merged with a data string having M sorted data in descending order to generate a data string having 2M+1 sorted data. The data value at the median rank of the 2M+1 sorted data is output as the median value of the M×N image data.