[Elphel-support] Asking the technical help

Sat Nov 12 07:33:11 PST 2011

Hi Andrey,

Thank you so much for your clear explainations. It's very helpful for me to
decide which technical way we will chose. Our engineers will dig in the
details by following your instruction. Meanwhile, I am wondering if your
company would take this job as a contract for us.

Thanks again and have a good weekend,

Guanghai

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: elphel at gmail.com [mailto:elphel at gmail.com] On Behalf Of Andrey
Filippov
Sent: Friday, November 11, 2011 1:26 PM
To: GuangHai Jin; support-list at support.elphel.com
Subject: Re: [Elphel-support] Asking the technical help

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

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