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'[EE]:rfcamera project - ideas?'
2002\04\18@222323 by Ian Hynes

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PICers,
Sorry for the 2nd send - screwed up the EE tag  :(

I'm sStill thinking about that digital cam project - digital imaging
sensor of some sort hooked up via an RS232 to a radio modem. The idea
being to send images thru the aether. Want to use narrow band UHF data
telemetry, not a video signal.

It don't really look do-able using a PIC with a USB cam, the reasons
for which we kicked round earlier.

OK, there are lots of image sensing chips out there. Kodak's KAC0311
series & Motorola's MCM20014 & MCM20027 chips, which use Kodak's
technology so they're basically the same. National has one too.

Turns out the heart of the sytem isn't the image sensor itself but the
co-processor. There's one called "Clarity 2". It has 208 (!!) pins and
works at 48MHz. It uses an IBM ASIC, whatever that is, and the
development kit for the ARM processor inside it costs - wait for it -
USD15,000!! Even the low end, like a dev board + lenses + software etc
from eg. National, is around USD2500. Obviously we're not talking
hobbyists' budgets here  :(

And it sure don't look as if the sensor itself would be directly
hackable by anything less than a Clarity device, never mind a PIC :(

On the other hand, Clarity 2 dumps the image from the sensor into an
SDRAM & NVRAM which probably would be accessible by a high level PIC,
say an f877. So from that point of view maybe the thing would be
do-able?

So, uh, I'm looking for ideas, guys? Say you want to capture a digital
image and send it thru a modem - thru an RS232 interface in this case
cuz that's what the ones I can get use.

How would you go about it? Heh, are we back to hacking old digital
cameras? Gotta be some more satifactory way - how do the astronomers
do it with their CCD thingys for example?

Thanx for ideas - Ian.








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2002\04\18@222934 by Tony Nixon

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Ian Hynes wrote:
>
> PICers,
> Sorry for the 2nd send - screwed up the EE tag  :(
>
> I'm sStill thinking about that digital cam project - digital imaging
> sensor of some sort hooked up via an RS232 to a radio modem. The idea
> being to send images thru the aether. Want to use narrow band UHF data
> telemetry, not a video signal.
>
> It don't really look do-able using a PIC with a USB cam, the reasons
> for which we kicked round earlier.

I don't know if this approach helps with ideas...

http://www-2.cs.cmu.edu/~cmucam/

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Best regards

Tony

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2002\04\18@225333 by John Dammeyer

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Hi,

What sort of image size are you thinking about?  And colour or B&W?

John Dammeyer



> I'm sStill thinking about that digital cam project - digital imaging
> sensor of some sort hooked up via an RS232 to a radio modem. The idea
> being to send images thru the aether. Want to use narrow band UHF data
> telemetry, not a video signal.

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2002\04\19@142633 by Ian Hynes

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Thanks Guys.

The MCM20014 sensor is 1/3 inch & Gives a 640x480 VGA resolution
image. That seems to be fairly typical of the current generation.

Mitsubishi's 64282 artificial retina can be clocked by a mid-range
processor but its integration time seems pretty slow & it's 128x128
pixel : the technology is a few years old by now. Could use it I
guess- they have a colour version out now, I think. The latest Kodak &
MCM technolgy seems ridiculously complex - but maybe I'm just pretty
simple? :(

I'll have  a closer at that CMUCAM thingy : it's about the only el
cheapo artificial vision gizmo I've seen. thanks for the pointer,
Tony.

Regards - Ian


>I don't know if this approach helps with ideas...
>
>http://www-2.cs.cmu.edu/~cmucam/



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