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From: "Farwa Bat" <farwa@mathworks.com>
Newsgroups: comp.soft-sys.matlab
Subject: Re: Image filters,Edge detectors
Date: Tue, 8 Jan 2008 23:10:05 +0000 (UTC)
Organization: University
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Thanks .... is this the only difference or there is some 
more.


...................................................
"Peter Bone" <peterbone@hotmail.com> wrote in message 
<fm047a$af4$1@fred.mathworks.com>...
> "Farwa Bat" <farwa@mathworks.com> wrote in message
> <fm03vr$rjd$1@fred.mathworks.com>...
> > Hi,in matlab for edge detection sobel,prewit,etc are 
> > available,using edge command.There is also filter2,and 
> > conv2 using fspecial command same sobel ,prewit are 
used.
> > Why and When I shpuld use 
> > 
> > 1)edge command and find edges.
> > 2)filter2 or conv2 for same classical filter
> > (Sobel,Prewit...etc).
> > Plz explain the difference in detail because most of 
these 
> > are used as edge detectors.
> > 
> 
> I believe the edge command returns a thresholded binary
> image whereas the others just return the filtered image
> without thresholding.