On Tue, Apr 23, 2013 at 2:54 PM, Nils Blum-Oeste
<nblumoe...@googlemail.com>wrote:
> Furthermore I am looking for a nice image import/export. This does not
> have to be the same library, but would be great if things work together
> nicely.
>
If you're using ClojureJVM, at least, you have this already (and even the
capacity to add format plugins!).
Check out javax.imageio.
One plugin in particular you might want to get is the TIF plugin. It adds
both .tif image format support *and* the ability to extract exif metadata
from any format that supports it, including jpeg. It's handy if you want to
get the info that cameras put in jpegs they take, or the keywords, caption,
and rating that Windows users can give to jpegs using the default Windows
picture previewer. Sadly, there's no simple "getKeywords" function or
similar, though; you need to do a bit of hacking to retrieve particular
exif metadata fields, and a bit of Googling to find out what those are. On
the other hand, creating a wrapper library in Clojure to provide a much
nicer interface to the exif metadata might be worthwhile -- perhaps a
function to read the metadata from an image file and return a Clojure map
with meaningful keys and the corresponding values that were found in the
image, such as
{:focal-length "3.50 mm"
:keywords ["tree" "pine" "white pine" "Pinus strobus" "Appalachia"
"Pennsylvania" "nature"]
:caption "White pine growing at 1780ft elevation in the central Appalachia"
:date-taken <java.util.Date whatever>}
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