"damien dunlop" on wrote...
| Possibly the most common requirement of a caption
| is to place it beneath the image. But this does not
| appear to be easy. The following lines appraoch
| a solution but are not sufficient.
|
| convert A.gif \
| -gravity South\
| -background White -splice 0x30 \
| -pointsize 20 -annotate 0 \
| 'Fig 33.' \
| B.gif
|
| The problem with the above is that it does not automatically
| centre the text vertically on the added splice, it places
| the baseline on or a little above the bottom of the splice,
| which may be nowhere near the centre. I have considered
| labels, captions, enclosing options in \(...\) but have not
| found a simple solution.
|
No it doesn't. It is a fast hack to add a caption.
Other methods are listed in
Annotating Images
http://imagemagick.org/Usage/annotating/#annotating
There are alturnatives, usally involving generating the caption as
a separate image, and appending or overlaying it.
But these have problems in accessing image meta-data, as teh meta-data
is stored in a different image to the one you are working on.
There are ways around that such as
1/ using user defined global 'options' to pass the meta-data
See http://imagemagick.org/Usage/text/#user_escapes
2/ Cloning then warping the original image into the canvas of the
caption image so meta-data will pass along with it.
For example see... Thumbnails, Adding image Labels
http://imagemagick.org/Usage/thumbnails/#labels
Neither technique is very nice however, as you can see.
We are hoping to allow better access to image data from ANY
in-memory image, in the future. But for now this is a IM
limitation, with workarounds.
Anthony Thyssen ( System Programmer ) <[EMAIL PROTECTED]>
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Who was to say that there weren't trolls in those tunnels, demons
in those depth? Perhaps the real illusion of Dream Park was the
pretense of technology. --- Niven and Barnes, "Barzoom Project"
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Anthony's Home is his Castle http://www.cit.gu.edu.au/~anthony/
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