So, here's my effort for the community using Linux.

Brightness Visualization program inspired by Sabre in this thread

What this can do:
- Shows images brightness levels
- Does isometric 3d output in black&white wire frame and in solid colors.


Image file is choosed and Show picture button is being clicked.


Show brightness is clicked..


Tool draws black and white isometric image as default.
Space between black wires can be set with a spin button.


When solid image is toggled tool draws a solid image, but this is sooo slow.
At least with my pre-historic 600 MHz Duron


Requirements.
- Linux with gtk-2.0 librarys

Binary and source code for this can be downloaded from here

Just extract package to some folder.
Binary can be found from src folder with a name GBright.

Compiling from the source.
Install gtk-2.0 librarys and all the dependencies.
Unzip package to some directory f.ex /home/[your username]/Projects/
cd to hsv directory.
Type:
./configure
make

If everything went smoothly, there should be GBright binary in /hsv/src/ folder.

Using Anjuta 1.X development environment.
Choose Open project and load file hsv.prj from the project folder.
Close all error dialogues that pop-up.
Go to Build -> Configure and clik OK
If configure went ok, then open callbacks.c file and then try to compile and build the project.


Tools used for this.
Ubuntu 6.10
For coding Anjuta 1.9, Glade for gui building.

Known bugs..
Drawing solid isometric image is a pain in the ass.
isometric.c needs fixing (anyone ??)

Porting to MAC
I cannot help with this, but Gtk-2.0 libraries are available to Mac.
Visit this page for further information.

Disclaimer
-This code is released under GPL so you can do almost anything with it.
-If you find a bug and fix it or add a new feature, please send it to this thread

thats sweet!!

any chance for a windows version?

Cool dude.. I'll give it a try. ;-)

Not from me, I don't have Windows. Use Sabre's tool instead (and by tool I mean program he wrote)
Gtk librarys are available to Windows too and there's always Cygwin if you're interested compiling the sources on Windows machine.

Nice tool I look forward to trying it out.

This tools works perfect on Ubuntu 7.04. If your running amd64 version need to get ia32 libraries to run the included binary. (or just build from source )

Cheers.

(and thanks for the great tool)

Great tool, worked great in Fedora 7. Should be stickied.

This is some AWESOME work! Thanks so much, open source for the win!

Thanks for the comments

I got also a test pattern program, haven't touhced it for six months or so.
So far it can create 11 premade test patterns in resolution you want.

Also I tried to make simple enough graphic function calls so users can make their own test patterns (oh yes, compiling in this case is mandatory)

I can check out it's state and upload sources and binarys if you like.