Re: [Playerstage-users] using player with an SPCA-compatibile remote webcam

[Toby C. <tco...@pl...>]

As far as I am aware there is no camera driver that will read from remote
images, however it would not be a particularly hard driver to write,
particularly as you are already familiar with whats involved in writing a
player driver. So I would recommend writing a driver that fetches the images
using http gets and then publishes them using the player camera interface.
This will allow you to use the existing player image processing drivers.

You may already be aware of this, but performance of colour extraction on
jpeg images will not be very accurate given jpeg compression compresses
colour infomation much more aggressively than intensity detail.

Toby

On 7/10/07, lorenzo <lgr...@me...> wrote:
>
> greetings. I have a question about using player with a linux FOX board
> (www.acmesystems.it).
>
> The situation: we connected a generic usb webcam to the fox board, and
> we implemented a simple communications prootcol to talk with the linux
> board. We also build a player driver to talk with this remote board
> (something roomba-like).
>
> The objective: we'd like to use the various blobfinder/opencv stuff in
> player with the webcam we have. Installing player on the FOX board is
> not possible; instead, we retrieve every jpeg with a "get" command via
> the network.
>
> My question: is there a simple way to use a Camera driver with such a
> set-up? Is there a Camera-like player driver that can "retrieve" an
> image from a remote webcam and use it?
>
> Sorry if the question looks very simple, but the documentation lacks
> such topics and the only interesting entry in the Wiki
>
>
> http://playerstage.sourceforge.net/wiki/Basic_FAQ#How_can_I_read_image_data_from_a_camera.3F
>
> suggests writing a plugin for such a task, or
>
> "Raw image data can be read on the client side using an appropriate
> proxy ((e.g., CameraProxy in the C++ client, or playerc_camera_t in
> the C client)"
>
>
> best regards,
>
> --
> :lorenzo grespan
> GPG Key fingerprint = 5372 1B49 9E61 747C FB9A  4DAE 5D2A A9A0 74B4 8F1A
>
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