Main Site Documentation

IR camera


#1

Hi,

I like to use the cobra with the following camera

Is the Cobra and the NETMF capable of sending this video over WiFi? I think I have read somewhere it couldn’t.

Roel


#2

given this outputs an RCA signal, you need some way to get that “in” to a digital format. So I’d say you should look at other options here, not going to do what you want. A 2.4ghz video-sender would probably be easier.


#3

OK!

Do you have examples of a 2.4 GHz sender?


#4

Roel, you are dutch, right?
If so, this is something that might interest you. I have found it yesterday, and I will order one of those soon.

Click here for the page. THIS PAGE IS DUTCH, IF YOU CANNOT READ DUTCH, DO NOT OPEN :stuck_out_tongue:


#5

Hmmm interesting! But no interface with .NET, I prefer that!

Bedankt!

Roel


#6

I think I have now a solution! Very simple …

(No spam just an answer)


#7

But there is a lot of work to do :smiley:

I don’t know which device class of this cable ,but you have to know a lot of USB stuff to write a driver for this camera

What about a Wiimote . AFAIK there is a built-in IR camera


#8

The intention is the following.

  • connect camera rca to rca2usb
  • connect usb to board
  • connect board to Zigbee
  • connect Zigbee to coordinator
  • connect coordinator to PC
  • PC shows images

I heard that with a baudrate of 115200 this would be possible. Do I need in this scenario still the driver? Or can I convert the signal simple to serial and back again?

Roel


#9

You said you want to connect it to zigbee/xbee. Xbee is serial communication (UART) so I do not quite know what you want to know?


#10

The RCA output from the camera is converted to digital by the cable (RCA2USB). Now I like to transfer the converted digital signal over Serial (Zigbee) to the PC. Is this possible? Or are these two total different things? May be I don’t get it …

Roel


#11

I was thinking:

When I connect the camera as a USB host. Create a memorystream of the input, in this case to digital converted RCA. Of the memorystream I can create a bytearray.

Is it possible to take the signal of USB and convert it to a memorystream with NETMF?

Hmmm or are we talking about drivers then again …

Roel


#12

Zigbee is not the correct choice for video. It is designed to pass small messages using low power and thus has a limited throughput.


#13

Would bluetooth be better or am I stuck with WiFi?

Got still one question remaining:
Is it possible to take the signal of USB and convert it to a memorystream with NETMF?


#14

I think (personally) that anything related to video is not something you can effectively handle on a micro controller. Certainly the data rates are way too high on most serial data streams.

Still images are a different matter, at low enough resolutions.


#15

digital video and embedded are not embedded system friendly and defiantly not something anyone can do beside experts in image processing…not FEZ and not any other chip!


#16

So not possible with NETMF (and noobs) is the conclusion.


#17

well, not the way you are currently thinking of the solution :wink:

here’s the kind of thing I was talking about as a sender.
http://www.mrgadget.com.au/catalog/avlabs-av-magic-24ghz-wireless-audiovideo-sender-receiver-p-1988.html

If you just want to get the image “data” from one place to the next, then you can do that with this. Where would a microcontroller play in this space? Well, it might not be needed - certainly isn’t going to be needed for the image transmission. But again, what did you actually want to do - I don’t think you’ve articulated what the overall plan might have been so it’s a bit hard to suggest any other alternatives. (but video data rates and “slow” communication rates like a microcontroller has are not going to be possible)


#18

indeed, for such projects you would need a wireless sender.
Or, you buy one of the site I gave you. It comes with l-ion battery and camera.


#19

Thanks!

I will explain what I want!

I like to drive a robot (unmanned) remote from my laptop. So all it need is to send the data so I can see where I am driving. Commands etc will be given by Zigbee so I think also now there is no room for video by the way.

Is making a webserver on a camera an idea with WiFi, or buy one? I like to use DPWS also for sensors so I can use the Wifi for that also. This should be possible with the Cobra, I think.

I can also change the choice of the camera to a still jpeg images camera and do something like this:

I can take pictures on a certain rate so it looks like a video.


#20

Why not just use a WiFi camera? Then you can still use Cobra for your sensors. DPWS is possible but this is a high end way to connect sensors, which I personally think is an overkill for 99% of embedded applications. You can make your own protocol much simpler and be done in minutes vs hours with DPWS!