W3C home > Mailing lists > Public > png-group@w3.org > December 2005

PNG filters

From: chportko <chportko@yandex.ru>
Date: Tue, 6 Dec 2005 19:47:06 +0300 (MSK)
Message-Id: <4395C08A.000003.26784@webmail11.yandex.ru>
To: boutell@boutell.com, png-group@w3.org
Dear  Thomas Boutell, Mark Adler and employees of PNG Development Group!

I am sending on at your consideration a filter created by myself with the purpose of including the latter into standard PNG: 

Function AverageLaneFilter (Left, Upper, UpperLeft, UpperRight)
  return Left+(UpperRight+2*Upper-3*UpperLeft)/4

Here Left is the value of similar components of the previous point, UpperLeft, Upper, UpperRights  are the value of similar components according to the left, central and right points in the previous line correlated with the filtered.

More detailed  in the file of FiltrPng.doc

Received on Wednesday, 7 December 2005 06:38:25 UTC

This archive was generated by hypermail 2.3.1 : Tuesday, 6 January 2015 19:43:40 UTC