PTZ orientation

[hedge]

Hi

I'm just about to embark on a new project to build an underwater pan tilt zoom camera using a dome style security camera (probably the panasonic wvcs574). As well as having one with the dome facing downwards as per its design I would like one which mounts horizontally and keeps the picture the right way up at all times. The unit currently has a 360 endless pan and a 180 tilt this would need to change to a 180 pan and 180 tilt at 90 degrees to each other. Has anyone ever attempted anything like this before or ideally does anyone know where I can find a horizontal mount dome style camera?

Cheers

Hedge

[Theatronics]

I have heard of such a thing but only as part of a camera package.
Flipping and turning a video image is a complex trick.  I am not aware
of any Digial processor chips that make this any easier.  Usually it involves
a image capture system that converts the incomming signal to a array of
digital data.  Then a second circuit scans the memory and creates a new
video signal based on the data in the array.

For instance the pattern below.

  A B C D
  E F G H
  I  J  K L
  M N O P

would appear in a video signal like this
  <Flyback signal><Retrace> A B C D<Retrace> E F G H <Retrace> I J K L <Retrace> M N O P

Once captured in an array the data could be scanned from Bottom to top
resulting in this pattern
  <Flyback><Retrace> M I E A <Retrace> N J F B <Retrace> O K G C <Retrace> P L H D

Once re-assembled on a screen the image would appear turned 90 degrees to the right:

    M I E A
    N J F B
    O K G C
    P L H D

Scanning from bottom to top starting at the right and moving left would result in a 90 degree turn to the left.
Scanning from right to left and bottom to top will result in a 180 turn.

-Mike