Hello Winston,
There are several problems. One is that the settings are different for the two
channels. to set the same value, you may open one of those
settings in the "New value" column - decimal or hex, then put 3 (after 0x) in
the "Broadcast mask" (+1 there means "channel 0", +2 - "channel 1", if you had
all 4 sensors you needed "f"). Then if you press "Apply" button it will set the
new value for both channels (you may open other one in other window and press
"Refresh" button there after updating first window).
There also seems to be a bug that we did not have before - I'll look into that
issue. Meanwhile - reduce AEXP_LEVEL to f500 hex in the table or to 245 as
shown on screenshot (the selected blue input field).
Do you know how to save camera settings so they will be used next time the
camera is started?
Andrey
---- On Mon, 08 Jan 2018 18:10:10 -0800 Winston
Zhang<winston.zh...@blacksesame.com.cn> wrote ----
Hi Andrey,
The default value were set as attachment.
Best Regrad!
Yicheng-Zhang
Email: winston.zh...@blacksesame.com.cn
Teil: 18516291005
Addr: 707 room, 7th floor, building 4th, No.1761, Zhangdong road, Pudong area
发件人: Elphel Support [mailto:support-list@support.elphel.com]
发送时间: 2018年1月9日 星期二 10:03
收件人: Winston Zhang <winston.zh...@blacksesame.com.cn>;
support-list@support.elphel.com
抄送: Tao Zhang <tao.zh...@blacksesame.com.cn>; Elphel Sales | Olga
Filippova <sa...@elphel.com>; Qun Gu <qun...@blacksesame.com>
主题: Re: [Elphel-support] 答复: 答复: 答复: 答复: 答复: 答复: 答复: 答复: Re: Quote for 1
NC393-Stereo camera
Hello Winston,
got the video - difficult to tell w/o settings. Can you open these URLs
(modify IP if needed) and post the values?
for port 0:
http://192.168.0.9/parsedit.php?sensor_port=0&EXPOS&WOI_LEFT&WOI_TOP&WOI_WIDTH&WOI_HEIGHT&AUTOEXP_ON&HISTWND_RWIDTH&HISTWND_RHEIGHT&HISTWND_RLEFT&HISTWND_RTOP&AUTOEXP_EXP_MAX&AEXP_FRACPIX&AEXP_LEVEL&AE_THRESH&AE_PERIOD
for port 1:
http://192.168.0.9/parsedit.php?sensor_port=1&EXPOS&WOI_LEFT&WOI_TOP&WOI_WIDTH&WOI_HEIGHT&AUTOEXP_ON&HISTWND_RWIDTH&HISTWND_RHEIGHT&HISTWND_RLEFT&HISTWND_RTOP&AUTOEXP_EXP_MAX&AEXP_FRACPIX&AEXP_LEVEL&AE_THRESH&AE_PERIOD
Andrey
---- On Mon, 08 Jan 2018 17:33:51 -0800 Winston
Zhang<winston.zh...@blacksesame.com.cn> wrote ----
Hi Andrey,
Please receive the attachment.
Best Regrad!
Yicheng-Zhang
Email: winston.zh...@blacksesame.com.cn
Teil: 18516291005
Addr: 707 room, 7th floor, building 4th, No.1761, Zhangdong road, Pudong
area
发件人: Elphel Support [mailto:support-list@support.elphel.com]
发送时间: 2018年1月9日 星期二 9:24
收件人: Tao Zhang <tao.zh...@blacksesame.com.cn>
抄送: Winston Zhang <winston.zh...@blacksesame.com.cn>; Elphel Sales |
Olga Filippova <sa...@elphel.com>; Qun Gu <qun...@blacksesame.com>
主题: Re: 答复: [Elphel-support] 答复: 答复: 答复: 答复: 答复: 答复: Re: Quote for 1
NC393-Stereo camera
Tao,
OK, will wait for the picture. White balance does not need to change for the
outdoor (maybe for night city with electrical lights - and I still recommend to
use presets). You see there are conditions when it is easy to fool AWB, and
while it may be OK for just a regular camera, you need to know exactly how the
image is processed to match multiple images.
The AWB algorithm is rather simple. It assumes that the brightest object in
the scene is white - and in most cases it works. But when there is nothing
white in the scene - AWB fails.
With AE you may try to change those values I mentioned earlier.
Andrey
---- On Mon, 08 Jan 2018 17:06:43 -0800 Tao
Zhang<tao.zh...@blacksesame.com.cn> wrote ----
Hi Andrey,
We will fix the camera on a car. The light condition may change. AWB need to
adapt to the change. For AE, the scene is normal in the office, there is not
bright light. But it cannot converge to a stable status. We will attach images
and videos of those problems later.
Tao Zhang
章 涛
发件人: Elphel Support [mailto:support-list@support.elphel.com]
发送时间: 2018年1月9日 4:02
收件人: Tao Zhang <tao.zh...@blacksesame.com.cn>; Elphel List
<support-list@support.elphel.com>
抄送: Winston Zhang <winston.zh...@blacksesame.com.cn>; Elphel Sales |
Olga Filippova <sa...@elphel.com>; Qun Gu <qun...@blacksesame.com>
主题: Re: [Elphel-support] 答复: 答复: 答复: 答复: 答复: 答复: Re: Quote for 1 NC393-Stereo
camera
Tao,
I did not get the attached image to see your problem, but I expect you just
need to modify the settings. Camera has a flexible control over AWB and AE to
provide optimal operation for different lighting conditions. Most likely
problem of of the instability is that there is a bright light source in the
field of view.
First you need to make AE stable, then set or disable AWB (it only needs to be
changed when you move from the indoors to outdoors), so if you work outdoors
you may just set AWB once and then save parameters - that will make image
matching easier.
For AE you may control:
1) the AE window (camera will only consider exposure for the selected
rectangle, ignoring lights outside it.
2) The fraction of pixels that should have intensity values below certain
threshold - reduce default value if there are lights in the FOV (especially
electrical lights that have flicker)
3) The level (default 250) - target of autoexposure.
There are some illustrations on the wiki:
https://wiki.elphel.com/wiki/Autoexposure
Andrey
---- On Mon, 08 Jan 2018 01:10:17 -0800 Tao
Zhang<tao.zh...@blacksesame.com.cn> wrote ----
BTW, your stereo AE has oscillation and AWB is not accurate. Do you have
updated firmware to solve these problems?
Tao Zhang
章 涛
发件人: Winston Zhang
发送时间: 2018年1月8日 16:54
收件人: Oleg <support-list@support.elphel.com>
抄送: Elphel Sales | Olga Filippova <sa...@elphel.com>; Dan Pan
<ad...@blacksesame.com>; Tao Zhang <tao.zh...@blacksesame.com.cn>;
Qun Gu <qun...@blacksesame.com>
主题: 答复: [Elphel-support] 答复: 答复: 答复: 答复: 答复: Re: Quote for 1 NC393-Stereo
camera
Hello
Thank you for your patient to answer my question. But I have some others
as follow.
1) How should I make the left and right camera AWB change synchronously?
The left camera image color is very different with right camera image color.
Please look at the last email attachment. I followed your advices, and set the
WB_EN=0 and GAINR/GAING/GAINB = some value, and made the left and right camera
image WB very close. But it just applies only to one situation. If I change the
ambient lighting brightness, the GAINR/GAING/GAINB value should be set again.
2) How should I make the left and right camera exposure change
synchronously? The left and right camera exposure at different time and cause
the image brightness different. So, if I capture the same timestamp frames, the
frames brightness are so different. I want to do some stereo-match work, but
all of these get me into trouble.
Best Regrad!
Yicheng-Zhang
Email: winston.zh...@blacksesame.com.cn
Teil: 18516291005
Addr: 707 room, 7th floor, building 4th, No.1761, Zhangdong road, Pudong
area
发件人: andersonnotg...@gmail.com [mailto:andersonnotg...@gmail.com] 代表 Oleg
发送时间: 2017年12月28日 星期四 3:13
收件人: Winston Zhang <winston.zh...@blacksesame.com.cn>
抄送: Elphel Sales | Olga Filippova <sa...@elphel.com>; Dan Pan
<ad...@blacksesame.com>; Tao Zhang <tao.zh...@blacksesame.com.cn>;
Qun Gu <qun...@blacksesame.com>; elphel support-list
<support-list@support.elphel.com>
主题: Re: [Elphel-support] 答复: 答复: 答复: 答复: 答复: Re: Quote for 1 NC393-Stereo
camera
Hello,
1) How could I get the raw data of camera. Because when I got the rgb data
from multipart jpeg stream, the image had some color blocks if I amplified
eight times. I thought it could be caused by image conversion
compression.(please look at the attachments).
You can switch to JP4 format - it's close to raw.
What I see in the attached images is they have different white balance. And
also there are overexposed areas which can affect the correct balance.
The white balance is run independently for each sensor - you can try to set
it so the images look the same and then turn off for both sensors:
a) open the web interface for each sensor - click on the green circle OR
b) set WB_EN=0 (also for both channels) in parameters - if you change it
through a table
(http://192.168.0.9/parsedit.php?sensor_port=2&title=Parameters+for+groups:+whiteBalance+&GTAB_R&GTAB_G&GTAB_GB&GTAB_B&WB_THRESH&WB_PERIOD&WB_MASK&WB_EN&WB_WHITELEV&WB_WHITEFRAC&WB_MAXWHITE&WB_SCALE_R&WB_SCALE_GB&WB_SCALE_B&GAIN_MIN&GAIN_MAX&GAIN_CTRL&GAIN_STEP&ANA_GAIN_ENABLE)
then there is a broadcast mask to set the parameter for all sensors at the
same time - set it to F.
if I amplified eight times.
What are the gains and exposure for each sensor?
2) The camera temperature has risen quickly, and I could not capture
images. Because it was so slowly to run the video when the camera had been
opened for four hours. But If I closed the camera and the temperature dropped
down, the video was showed normally.
What is the temperature? http://192.168.0.9 > Temperature monitor
If it's around 70-80 it's ok (at 90 degrees the camera is forced to shut down)
Also, the camera should reach the steady temperature pretty much in the the
first 30-60 mins.
- what is the image quality?
- what are the exposure times? you can try limiting exposure time. The
default fps is 10 - so, It will get slow if exposure times are >100ms.
- is the camera and the pc the only devices in the network? camera connected
directly to PC vie cable?
- connect to the camera via ssh and check cpu load:
$ ssh root@192.168.0.9
root@elphel393:~# htop
then click on CPU% table header.
- your PC's cpu load? If you are watching from the browser - it might not be
able to handle the streams as well.
Best regards,
Oleg Dzhimiev
Electronics Engineer
phone: +1 801 783 5555 x124
Elphel, Inc.
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