[Info-vax] simple image processing

Phillip Helbig---undress to reply helbig at astro.multiCLOTHESvax.de
Sat Aug 13 05:20:28 EDT 2011


In the (somewhat) old days when I used to photograph with film, I would 
ask for a CD with JPEG files.  Usually, these were in one directory and 
thumbnails were in another.  Now, with a digital camera, I of course 
still have the JPEGs (now of higher quality, of course), but by default 
don't get the thumbnails.  (I still print out almost all pictures, which 
I do at a photo shop since it is much easier and also cheaper.  Getting 
everything on a CD costs just peanuts and is easier than burning one at 
home.)  Thus, I'm looking for a quick and easy method to generate 
thumbnails.  The idea is to have a web page of thumbnails with links to 
the full-resolution pictures.  (Using HTML to shrink the image is not an 
option since the whole image still gets loaded, which takes too much 
time.)

Is there any tool on VMS which can do this?  I realise that I could do 
it on a non-VMS system, but a) I would have to learn an application 
first, so I might as well learn it on VMS if possible and b) what I 
really want is something I can script, rather than doing it 
interactively in some GUI (presumably that is more likely to be found on 
VMS).

Now, I am using CSWB 1.7-11 on ALPHA.  It's fine for most things, but 
with JPEG files it doesn't automatically scale the picture to fit the 
screen, but rather displays just part of it (at least for a file with a 
large number of pixels).  Is there any way to change this?  Is there a 
newer version of CSWB?  If so, does it do the automatic scaling.  What 
about Mosaic on ALPHA?  (I have it on VAX, but a) not the latest version 
and b) I don't have any VAXen in my cluster anymore.)




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