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2d filters and large images (continued from ASSOC) [message #39597]

Wed, 26 May 2004 16:37

Jonathan Greenberg
Messages: 91
Registered: November 2002

Member

So I probably should have asked a more general question (thank you for the
feedback on ASSOC, by the way). I was hoping to get some feedback on how to
apply 2-d filters of various sizes to a large 2-d image (too big to load the
entire file into memory) -- which ways would work the best? Right now, if
my filter is, say, 5 x 5, I grab 5 lines of the image and run through the
center pixels (row 3 in the subset) and apply the filter, then grab the next
line and create a new 5 line x number of samples chunk.

Are there better/quicker/easier ways of applying filter like this?

--j

--
Jonathan Greenberg
Graduate Group in Ecology, U.C. Davis
http://www.cstars.ucdavis.edu/~jongreen
http://www.cstars.ucdavis.edu
AIM: jgrn307 or jgrn3007
MSN: jgrn307@msn.com or jgrn3007@msn.com

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