On Tue, Apr 12, 2011 at 7:28 AM, Florent Thiery
wrote:
> Hello,
>
> First, please let me introduce our use case; we are trying to use Elphel
> cameras (353 + Computar 4-8mm 1/2") to get maximum resolution (> FullHD), 25
> fps video.
>
> Our current problems are about image quality when zooming on
Andrey,
I understand.
I see two options:
1) turning leds always on
2) adding a mechanical shutter
Has anyone added a mechanical shutter to an 353 before?
Andreas
Andrey Filippov schrieb:
>
> Andreas,
>
> that depends on what are you trying to capture. If ERS distortion is
> not a problem in
Andreas,
that depends on what are you trying to capture. If ERS distortion is not a
problem in your case, and the LED is just to provide more light, not limit
the exposure - yes, you can do that (same as if LEDs were always ON for the
camera). If on the other hand, you need LED as a "snapshot shu
Andrey,
I can't set the exposure time even near 67ms. We have difficult lighting
conditions. For example, we have an indoor room with a bright window
where the cam is moving.
Setting the exposure time to 72ms will give me a blurred image of the
window. Anything else may be sharp due to the fact th
Sebastian,
Most consumer cameras with ERS have additional mechanical shutter - it opens
1/15 sec (if they used the same senor) after the sensor starts exposing the
first line, readout starts after the shutter closes. When using the bright
LED it the LED on state is virtually the same as mechanical
On Wed, Apr 13, 2011 at 21:03, Andreas Bean wrote:
> Andrey,
>
> In fact we develop a led light and not a discharge flash, therefore the
> light isn't deposited in a short period. You say the exposure of the
> last scanline starts 67ms after the first line. I'm trying the get light
> intensity hig
Andrey,
In fact we develop a led light and not a discharge flash, therefore the
light isn't deposited in a short period. You say the exposure of the
last scanline starts 67ms after the first line. I'm trying the get light
intensity high enough for an exposure time of 5ms. This means that the
leds
Andreas,
Why do you need pulse _before_ trigger? With this senor exposure of the
first line start 8 scan lines after the trigger, last line exposure starts
1/15 sec later. So if you want to use a flash, you need to set the exposure
time >1/15 sec and trigger flash 1/15 after the trigger.
The FPGA
Hello,
We are setting up a two camera system where the two cams will be
connected with the synchronization cable. As I remember it is possible
to transmit the timestamp to get exactly matching filenames.
Within this configuration we want to trigger a flash via an infrared
sender. Whats the b
