Questions aboutGaussianBlur
Posted by
José on
Feb 20, 2014; 12:40pm
URL: http://imagej.273.s1.nabble.com/Questions-aboutGaussianBlur-tp5006598.html
Hi,
I'm studying the code in
https://github.com/imagej/imagej1/blob/master/ij/plugin/filter/GaussianBlur.javaandI have some questions about some code and the maths behind it:
1) On lines 229-235 there are some adjustments to sigma based on
downscaling the image, applying the filter and upscaling again that i don't
fully understand. Could you explain more clearly that adjustments or
suggest any references i can check about applying the Gaussian blur with
that downscale-convolve-upscale approach?
2) On lines 179-186 one can see that, when bluring, extra lines are added
to the X component but not to the Y component. Why is that?
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