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Re: imread returns MxNx4 when Matlab returns MxNx3
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From: |
Rik |
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Subject: |
Re: imread returns MxNx4 when Matlab returns MxNx3 |
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Date: |
Mon, 16 May 2011 12:21:03 -0700 |
On 05/16/2011 10:00 AM, address@hidden wrote:
> When reading a png bitmap, imread() returns an image of size MxNx4,while
> matlab's imread() returns MxNx3. The extra index causes image() to crash.
Ben,
There is probably an alpha channel in the png image you are trying to read.
See this bug (https://savannah.gnu.org/bugs/index.php?32986) where the
alpha channel should be broken out, but is instead returned as a fourth
dimension. Easiest approach is probably to strip the 4th dimension
yourself, but not touch the Octave core functions.
--Rik