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Re: Filtering an image with a space-dependent function
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From: |
Søren Hauberg |
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Subject: |
Re: Filtering an image with a space-dependent function |
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Date: |
Sat, 23 Jan 2010 13:57:56 +0100 |
fre, 22 01 2010 kl. 17:52 +0000, skrev George:
> Can I filter an image using a mask that depends on each pixel? Without
> using loops to iterate over the pixels.
You can use the 'im2col' function from the 'image' package to rearrange
the image such that each block becomes a column in the new matrix. You
can then process each column at the time, which is often fairly easy to
vectorise.
If you just want to do smoothing with a variable smoothing factor for
each block, then 'imsmooth' can do something like that.
Søren