OT Anybody got underexposed digital photos?

[Tony Abou-Assaleh]

My friend, Billy, did some experiments with different algorithms. He used
some of my photos to illustrate the results. All are posted on his site
at:

http://scanline.ca/nlm/
http://scanline.ca/nlm/examples.html

Enjoy,

TAA

-----------------------------------------------------
Tony Abou-Assaleh
Lecturer, Computer Science Department
Brock University, St. Catharines, ON, Canada, L2S 3A1
Office: MC J215
Tel:    +1(905)688-5550 ext. 5243
Fax:    +1(905)688-3255
Email:  taa-HInyCGIudOg at public.gmane.org
WWW:    http://www.cosc.brocku.ca/~taa/
----------------------[THE END]----------------------

On Thu, 20 Oct 2005, Walter Dnes wrote:

>   Or even more of a nightmare, digital photos where one section is
> properly exposed, and the rest is underexposed?  I mentioned recently
> that I was using FreeBasic for a pet project.  That pet project was to
> try and salvage underexposed digital photos.  Like most consumer
> cameras, my Panasonic FZ5 is a great daylight camera, but has major
> problems in low-light situations.
>
>   ImageMagick is an Open Source set of commandline image manipulation
> utilities.  One of the things it can do is convert an image to a text
> file with one line describing each pixel.  A 5 megapixel image comes out
> to approx 150 megabytes but, hey, disc space is cheap.  It can also
> convert the other way.  What I did was to write and compile a FreeBasic
> program that reads the text file representing an image, does some number
> crunching, and outputs a modified text file representing an enhanced
> image.  The modified text file is then converted to an image by
> ImageMagick.
>
>   The process is clumsy, and should really be done using graphics
> libraries, but I'm not that good a programmer.  I like structured
> programming, but my version of "OOPS programming" involves hitting the
> {DEL} key at the wrong time.  Structured FORTRAN and BASIC are just
> right for my abilities.
>
>   Anyhow, I like what I see from my program, and I'll probably post on
> ImageMagick (mailing list) and Gimp (usenet group) to see if anyone can
> implement the algorithms directly.  I'd like to try other people's
> underexposed (or partially underexposed photos) and hear their reactions.
> Preferably via some form of file transfer, as my current inbox limit is
> 10 megs, and I subscribe to a few lists.  I never thought I'd need it,
> but if someone has a GMail invite to spare, this would be the time.  I
> find that bzip2 does much better compression than zip on TIF files.
>
> --
> Walter Dnes <waltdnes-SLHPyeZ9y/tg9hUCZPvPmw at public.gmane.org>
> An infinite number of monkeys pounding away on keyboards will
> eventually produce a report showing that Windows is more secure,
> and has a lower TCO, than linux.
> --
> The Toronto Linux Users Group.      Meetings: http://tlug.ss.org
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