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Re: imread (repost)
From: |
Daniel J Sebald |
Subject: |
Re: imread (repost) |
Date: |
Tue, 05 Aug 2008 13:02:04 -0500 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.3) Gecko/20041020 |
address@hidden wrote:
Quoting Daniel J Sebald <address@hidden>:
address@hidden wrote:
Quoting Daniel J Sebald <address@hidden>:
100% transparent would be not visible, I guess. The applications
would be special effects or masking off a rectangular image to
make it appear of a different shape.
But what does 'not visible' mean? Should we just show the
background color of the figure?
Yes, whatever is behind the image (up to the point of plotting the
image) gets blended with the image. Wherever the image is 100%
transparent the contents behind it is completely visible, i.e.,
unaltered.
Currently (and also in matlab I believe) you can only view one image at
a time.
That is why I'm not necessarily in the match-Matlab-exactly camp. (However,
can't multiple images be placed by using a collection of subplots? Of course,
that doesn't mean Matlab has implement alpha-blending across subplots.)
Anyway, I don't think there is any reason to not handle the data for a fourth
dimension in terms of imread()/imshow(). There still may be image processing
applications that want to simply bring in the image, perhaps manipulate the
alpha channel in some way, and then send the whole image to file as a new
image. No need for imshow() for that.
Dan
- Re: imread (repost), (continued)
- Re: imread (repost), soren, 2008/08/05
- Re: imread (repost), Daniel J Sebald, 2008/08/05
- Re: imread (repost), soren, 2008/08/05
- Re: imread (repost), Bill Denney, 2008/08/05
- Re: imread (repost), soren, 2008/08/05
- Re: imread (repost), Daniel J Sebald, 2008/08/05
- Re: imread (repost), Shai Ayal, 2008/08/05
- Re: imread (repost), Daniel J Sebald, 2008/08/05
- Re: imread (repost), Thomas Weber, 2008/08/06
- Re: imread (repost), Daniel J Sebald, 2008/08/06
- Re: imread (repost),
Daniel J Sebald <=
- Re: imread (repost), Przemek Klosowski, 2008/08/05