[Elphel-support] Asking the technical help

Tue Nov 15 03:27:39 PST 2011

Hi, 

250x1936 would not provide such a high frame rate. But you can select 320x240 for example. Than you can move this ROI over the sensor area and you can even change the ROI width, but keep the height constant. This should help to avoid broken frames while moving or changing the ROI. The frame rate may change if you change the width of the ROI. 

Best regards, 
Alexandre Poltorak 

----- Mail original -----

| De: "GuangHai Jin" <gjin at agiltron.com>
| À: "Andrey Filippov" <support-list at support.elphel.com>
| Envoyé: Mardi 15 Novembre 2011 11:26:22
| Objet: [Elphel-support] Asking the technical help

| Hi Andrey,

| I understand you as our company grows up from a small company as
| well. Thank you very much for your kind help to consult us. I have a
| few basic questions per your answers.
| 1) First of all you have to keep the window height constant…...
| Does it means that the dynamic small window should have the format as
| X.vs.1936 such as 250x1936 from the 2592x1936 sensor?
| As the full frame rate of your camera can realize 14fps with JP4 raw,
| does the maximum frame rate might reach up to 140fps approximately
| for 250x1936 small window?

| Thanks again,

| 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: Monday, November 14, 2011 12:30 PM
| To: GuangHai Jin; Elphel Support List
| Subject: Re: [Elphel-support] Asking the technical help

| Hi Guanghai,

| We will be happy to consult your engineers, but unfortunately we can
| not work on such project as a contract job. We are a small company
| and all our resources are used by our current projects.

| Andrey

| On Sat, Nov 12, 2011 at 8:33 AM, GuangHai Jin < gjin at agiltron.com >
| wrote:

| 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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