Re: sizing down an uploaded photo

"Carter, Scott" <[email protected]> wrote:

> I am hoping that someone using servlets has encountered this problem.
> I have a web site where user's can upload photos, but after the
> servlet uploads the file I would like it to also resize the
> deminsions of the picture and the quality (size).  Has anyone run
> into this problem?

I have some experience with this, not with servlets, but with PHP.  I
am sure you can do some image resizing with servlets, but I haven't
tried that way yet.  Anyway, this is what I did: I grabbed some PHP
code that handles uploads of images, and then when I got the image
uploaded I gave it a temporary name (for example, "abc.jpg") and wrote
it to a temporary directory on the server, just as you can do with a
servlet.  Then, I made a system call to "convert", which is a part of
imagemagick, to do the resizing for me.  I specified the reduced
image's name to be abc_small.jpg, and then I read that image, the
smaller one, back into the PHP (or, servlet in your case).  From there
I shlep'd it into the database, indexed it, and it was ready to go.
Then you can do whatever cleanup necessary, such as removing the
temporary files, etc.

Like I said, there may be some slicker way of doing it all inside the
servlet, but in my experience with imagemagick I've found that it runs
pretty quickly and really does a great job with doing the resizing.
Let me know if you try this way with your servlet -- I'd like to hear
how it goes.


Andy

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