[Elphel-support] Asking the technical help

[Andrey Filippov]

Hello Jason,

I'm sorry - we had a problem with the mailing list and I missed that your
previous email.

Yes, it is possible to dynamically re-program the small window, to the
extend it is supported by the sensor.

1) First of all you have to keep the window height constant - changing it
may cause sensor to output bad frame and it will be skipped by the camera.

2) There is a lag between sending the window parameters to the sensor, the
output of the new frame and compressing it in the camera (when you get the
frame and can analyze the objects there. The camera supports pipeline
modification of the parameters, when you provide the new values you also
specify to what frame it applies. On the hardware level the parameters are
stored in an 8 element circular buffer - the software driver places the new
values there and the FPGA code applies them to the compressor and send to
the sensor at appropriate time. The default "program ahead" (if you do not
specify when the new parameters should be applied) is 3 frames, but you can
change that in the php function call.

The PHP functions only allow you to program within the capacity of the
hardware buffer (up to 5 ahead, as of 8 elements others are kept after the
frame), but using parsedit.php - called directly or through autocampars.php
you can experiment with other program-ahead times, the software extends the
hardware command buffer. The parsedit.php allows you to open 9 (that number
can be changed) last images, each image has the image number, timestamp and
parameters, so you can verify if any images are lost or corrupted).

Andrey

On Fri, Nov 11, 2011 at 7:17 AM, GuangHai Jin <gjin at agiltron.com> wrote:

> ** **
>
> Dear Andrey,****
>
> ** **
>
> About one month ago, I sent you the e-mail to ask your help regarding the
> technical feasibility on your FPGA based camera, see the following e-mail.
> ****
>
> Could please you reply me kindly?****
>
> ** **
>
> Best regards, ****
>
> ** **
>
> Dr. Guanghai Jin****
>
> VP of R&D, Chief Scientist****
>
> Phone: 781-935-1200 ext 124****
>
> Fax: 781-935-2040****
>
> Agiltron, Inc****
>
> 15 Presidential Way****
>
> Woburn, MA 01801****
>
> www.agiltron.com****
>
> ** **
>
> *From:* GuangHai Jin [mailto:gjin at agiltron.com]
> *Sent:* Wednesday, October 05, 2011 11:24 AM
> *To:* 'Andrey Filippov'; 'support-list'
> *Subject:* [Elphel-support] Problem in using of LiveDVD****
>
> ** **
>
> Hi Andrey,****
>
> ** **
>
> We purchased your network cameras to build our detection system for
> checking a single object’s lateral motion at a refreshing rate about 10/s.
> The next goal is to increase the refreshing rate (>100/s) of the object’s
> position (x, y). My questions are****
>
> **1)      **Is it possible to dynamically reconfigure a small date (ex.
> 320x240) window for high refreshing rate in your network camera around the
> object as it moves?****
>
> **2)      **If “yes” in question 1, could we assign this kind of job to
> your company as a project contract?****
>
> **3)      **Do you have any recommendation? ****
>
> Thank you very much in advance, and looking forward to hearing from you.**
> **
>
> ** **
>
> Dr. Guanghai Jin****
>
> VP of R&D, Chief Scientist****
>
> Phone: 781-935-1200 ext 124****
>
> Fax: 781-935-2040****
>
> Agiltron, Inc****
>
> 15 Presidential Way****
>
> Woburn, MA 01801****
>
> www.agiltron.com****
>
> ** **
>
> *From:* Jason Chen [mailto:jianzhong_chen at agiltron.com.cn]
> *Sent:* Thursday, September 15, 2011 6:35 AM
> *To:* Andrey Filippov; support-list
> *Cc:* jianhuiye; GuangHai Jin
> *Subject:* Re: Re: Re: [Elphel-support] Problem in using of LiveDVD****
>
> ** **
>
> Hi, Andrey,****
>
>  ****
>
> This time I removed the "sudo" from the front of "netboot", it looks like
> program ran some but I'm not sure if the camera is OK now.****
>
>  ****
>
> Regards****
>
> Jason Chen****
>
>  ****
>
>  ****
>
> ** **
>
> _______________________________________________
> 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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