|
From: | James Sherman Jr. |
Subject: | Re: imresize and ImageJ |
Date: | Tue, 19 Aug 2014 15:18:28 -0400 |
I am trying to understand some differences in the results between ImageJ and
Octave when resizing an image
In imageJ If I start with a gray scale image that is 4000x1200 pixels and
scale it down to 1000x300 then down to 250x75. The default for ImageJ are
bilinear.
If I repeat the same steps in Octave, i.e. imresize(a, .25, linear) the std
deviations are not what I would have expected.
Here are the stdev
ImageJ Octave
4000x1200 4.694 4.694
1000x300 3.253 4.711
250x75 2.007 4.555
The drop in std dev seen in ImageJ seem to be what I would have expected.
With Octave, the fact that the std dev actaully increased in the first
resize operation seems particularly odd.
Perhaps I am misinterpreting what imresize is supposed to do in Octave?
Appreciate any thoughts.
--
View this message in context: http://octave.1599824.n4.nabble.com/imresize-and-ImageJ-tp4666125.html
Sent from the Octave - General mailing list archive at Nabble.com.
_______________________________________________
Help-octave mailing list
address@hidden
https://lists.gnu.org/mailman/listinfo/help-octave
[Prev in Thread] | Current Thread | [Next in Thread] |