Dear Duarte,
this example might be an inspiration
http://www.gctronic.com/doc/index.php/E-Puck#Still_images
usign the zoom basically skips pixels and lines and takes only the one
usefull. Not sure if you mean acquisition from the microcontroller or
also on the PC via bluetooth (BT). In that later case, most of the time
required by the BT communication.
regards,
Gilles
On 20:59, Duarte Dias wrote:
Hi,
I am using the e-puck 1176 (VGA camera 480x640 - rotated camera).
I am capturing some full (480 pixels) horizontal lines (1 to 8 lines)
applying the zoom factor of 1, 2, 4 and 8 (on the x component which in
this epuck camera is the vertical component).
I assume that if I am capturing 4 horizontal lines with zoom 2 its the
same of capturing 8 lines with zoom 1 (and so one). The zoom just does
the line averaging within groups of 2 lines.
When I capture the images I am using a timer (TIMER1) to quantify the
capture duration.
After my experiments from capturing 1 - 8 lines with zoom 1,2,4,8 I
have concluded that the capture time is approximatly constant (between
350 and 450), no matter the number of lines we take and the zoom we do.
I have also witnessed a large Jitter between frame captures (the
standard deviation of the frame capture times is arround 150ms!).
I was expecting a rise of time when I extracted more lines and no
Jitter should exist. Could someone tell me what I could be the cause
of this behaviour (expecially the Jitter behaviour).
Regards,
Duarte Dias
--
------------------------
Dr. Gilles Caprari
GCtronic Sagl, Electronics& Mechatronics
web: www.gctronic.com E-mail: [email protected]
Post: Via Cassarinetta 2, CH-6900 Lugano, Switzerland
Tel: +41 91 630 2149 Fax: +41 43 556 8006
Mobile: +41 78 601 1113 skype: gillescaprari
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