[Elphel-support] Global Shutter

[Abe Bachrach]

One other question for Andrey/someone else is:

- How much time elapses between when the first and last row are read-out?

from looking at the datasheet, it says that the maximum datarate is 96Mp/s,
which would mean that for full resolution, the time gap would be at least
0.052488 seconds.

- is the sensor being run at the full 96MHz clock rate? Is that time gap
number correct?

also,
- How does the subsampling mode effect this. If we put the sensor in
binning/skipping mode, and downsample by 4x, ideally, this would mean that
there it takes 0.0032 seconds to read out a frame.

thanks!
-=Abe


On Sun, Nov 28, 2010 at 3:34 PM, Abe Bachrach <abachrac at mit.edu> wrote:

> Thanks for the response....
>
> From talking to Andrey and Olga on the phone, it sounds like no one at
> elphel would have the time to tackle something like this themselves, so we'd
> have to look to the broader community.
>
>
> The type of sensor that we would be interested in is much lower resolution
> than the kodak CCD that they developed...
>
> something like this:
> http://www.aptina.com/products/image_sensors/mt9v022ia7atm/#overview
> or
> http://www.aptina.com/products/image_sensors/mt9v032c12stc/#overview
> look good to me, and would hopefully not be too different from the current
> sensor:
> http://www.aptina.com/products/image_sensors/mt9p031i12stc/#overview
>
> basically, looking for something that has a global shutter, and a
> resolution of  640x480 or possibly 1.3Mpixel.
> a camera like one of these:
> http://www.ptgrey.com/products/fireflymv/index.asp
> http://www.ptgrey.com/products/chameleon/index.asp
> combined with an FPGA to do image processing is what we're looking for.
>
> thanks!
> -=Abe
>
> On Sat, Nov 27, 2010 at 8:38 AM, Sebastian Pichelhofer <
> sebastian.pichelhofer at gmail.com> wrote:
>
>> Current Elphel 353 camera only has the rolling shutter option, there
>> is Elphel 363 as well that uses a high resolution, large scale Kodak
>> CCD but these sensors are rather expensive (~3000$) and only deliver a
>> rather low framerate (3-5fps if I remember correctly). Also if I
>> remember correctly Elphel does not have them in stock and requires a
>> batch of at least 10 orders or so before it will start production...
>>
>> Next generation Elphel 373 which will be released late next year (wild
>> guess) will feature a wider range of sensors.
>> Like Kodak CCDs in 2/3", 1" and 4/3" optical designs.
>>
>> Funding development of a new Sensor Front End now would be an
>> interesting option, the PCB hosting the sensor is a rather small and
>> not too dense board (http://www3.elphel.com/wiki/10338) but I guess it
>> depends very much on the new type of sensor how complex the new one
>> will be. And remember that a new sensor frontend will require some
>> software changes as well but since everything is open and available it
>> is very well possible.
>> Maybe Andrey can help estimate cost of such a project.
>>
>> Regards Sebastian
>>
>> On Wed, Nov 24, 2010 at 01:43, Abe Bachrach <abachrac at mit.edu> wrote:
>> > Hi there,
>> > I was very excited to find the Elphel camera since it looked like
>> exactly
>> > what I was looking for in terms of a camera integrated with an FPGA,
>> however
>> > I was disappointed to see that the only sensor available uses a rolling
>> > shutter.
>> > I am interested in using the FPGA to do visual odometry which requires a
>> > global shutter.
>> > http://www.youtube.com/watch?v=qRrMHaO6NpE
>> > Does anyone know of a camera that would provide us a user programmable
>> FPGA
>> > with a Global shutter?
>> > Alternatively, if we could hire someone to design a sensor board for the
>> > elphel system, we would be very interested.
>> > thanks,
>> > -=Abe
>> > _______________________________________________
>> > Support-list mailing list
>> > Support-list at support.elphel.com
>> >
>> http://support.elphel.com/mailman/listinfo/support-list_support.elphel.com
>> >
>> >
>>
>
>
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