[Elphel-support] 答复: 答复: 答复: 答复: 答复: sync stereo with lidar
Oleg
support-list at support.elphel.com
Thu Mar 8 09:20:02 PST 2018
Hello,
Did you try broadcast mask? Did it work?
You can do it from the page you sent the screenshot from:
192.168.0.9/parsedit.php?sensor_port=0...
Set the color to 5 and the "broadcast mask" to 0xf (means 'apply to all')
Best regards,
Oleg Dzhimiev
Electronics Engineer
phone: +1 801 783 5555 x124 <(801)%20783-5555>
Elphel, Inc.
On Wed, Mar 7, 2018 at 6:33 PM, Winston Zhang <winston.zhang at blacksesame.
com.cn> wrote:
>
>
>
>
>
>
> *Best Regrad!*
>
> *Yicheng-Zhang*
>
> *Email: winston.zhang at blacksesame.com.cn
> <winston.zhang at blacksesame.com.cn>*
>
> *Teil: 18516291005*
>
> *Addr: 707 room, **7th floor, building 4th, No.1761, Zhangdong road,
> Pudong area*
>
>
>
> *发件人:* Winston Zhang
> *发送时间:* 2018年3月8日 星期四 9:32
> *收件人:* 'Andrey Filippov' <andrey at elphel.com>
> *抄送:* Elphel Support <support-list at support.elphel.com>; Elphel Sales |
> Olga Filippova <sales at elphel.com>; Tao Zhang <tao.zhang at blacksesame.com.cn
> >; Qun Gu <qun.gu at blacksesame.com>; Pioneer Li <
> pioneer.li at blacksesame.com.cn>; Allen Yin <allen.yin at blacksesame.com.cn>
> *主题:* 答复: 答复: [Elphel-support] 答复: 答复: 答复: sync stereo with lidar
>
>
>
> Hi, Andrey
>
> I met a new question. I set ‘Color’ parameter with the five(it
> could get the jp4 format image)on one camera, and this camera image format
> was converted. But when I set the other one, this camera image format was
> not converted. Please help me test for it.
>
> Another question
>
> What is the raw jp4 format image with 100% compression bit wide? I
> read it and the result show the bit wide is uint8. But you web shows that
> the bit wide is 12bit.
>
>
>
>
>
>
>
> *Best Regrad!*
>
> *Yicheng-Zhang*
>
> *Email: winston.zhang at blacksesame.com.cn
> <winston.zhang at blacksesame.com.cn>*
>
> *Teil: 18516291005*
>
> *Addr: 707 room, 7th floor, building 4th, No.1761, Zhangdong road,
> Pudong area*
>
>
>
> *发件人:* Andrey Filippov [mailto:andrey at elphel.com <andrey at elphel.com>]
> *发送时间:* 2018年3月7日 星期三 14:20
> *收件人:* Winston Zhang <winston.zhang at blacksesame.com.cn>
> *抄送:* Elphel Support <support-list at support.elphel.com>; Elphel Sales |
> Olga Filippova <sales at elphel.com>; Tao Zhang <tao.zhang at blacksesame.com.cn
> >; Qun Gu <qun.gu at blacksesame.com>; Pioneer Li <
> pioneer.li at blacksesame.com.cn>
> *主题:* Re: 答复: [Elphel-support] 答复: 答复: 答复: sync stereo with lidar
>
>
>
> Winston,
>
> Quad quality 5MPix JP4 image should be 1.8-2MB size, yours is <500KB. For
> image processing I recommend using compression quality 97-98% as we do.
>
> The sensor uses Bayer mosaic, so sensor output has 5 MPix, not 3*5MPix -
> the color appears during de-mosaic process. JP4 saves pixels as they come
> out from the sensor (raw), color interpolation should be done during
> processing. Here are images that illustrate JP4:
>
> https://community.elphel.com/jp4/jp4demo.php
>
> For your application I do not recommend converting to color. When using a
> simple viewer there will be not much advantage over the camera JPEG output.
> For image matching you may first use just green channel (green pixels are
> in a checkerboard pattern), add color separately. When we process such
> images we apply different lens correction for each color and only mix them
> after aberration correction. Using just green is the simplest way to
> process.
>
> Andrey
>
>
> ---- On Tue, 06 Mar 2018 21:12:18 -0800 *Winston Zhang<*
> *winston.zhang at blacksesame.com.cn* <winston.zhang at blacksesame.com.cn>*>*
> wrote ----
>
> Hi, Andrey
>
> Please take a look at attachments. The rawJP4 image was captured
> from the camera, and I converted it and got the result as result.png. But
> when I magnified this image, I found some block included 16x16 grid. I did
> not know the reason. Can you explain it.(The grid image please take look at
> grid.png).
>
> Another question is that the result image is single channel but not
> three channel like as rgb-channel. But if I converted it through the
> jp4viewer, the result is color image. Why? How do you do this?
>
>
>
>
>
> *Best Regrad!*
>
> *Yicheng-Zhang*
>
> *Email: **winston.zhang at blacksesame.com.cn*
> <winston.zhang at blacksesame.com.cn>
>
> *Teil: 18516291005*
>
> *Addr: 707 room, 7th floor, building 4th, No.1761, Zhangdong road,
> Pudong area*
>
>
>
> *发件人**:* Andrey Filippov [mailto:andrey at elphel.com]
> *发送时间**:* 2018年3月6日 星期二 15:58
> *收件人**:* Winston Zhang <winston.zhang at blacksesame.com.cn>
> *抄送**:* Elphel Support <support-list at support.elphel.com>; Elphel Sales |
> Olga Filippova <sales at elphel.com>; Tao Zhang <tao.zhang at blacksesame.com.cn
> >; Qun Gu <qun.gu at blacksesame.com>; Pioneer Li <
> pioneer.li at blacksesame.com.cn>
> *主题**:* Re: [Elphel-support] 答复: 答复: 答复: sync stereo with lidar
>
>
>
> Winston,
>
> There are several ways how to set the JP4 mode:
>
> 1) set it from the camera GUI (click Camera Control Interface port #),
> then click camera icon (top left), then "More details" and select color
> mode to jp4.
> 2) set with "Parameter Editor": follow Parameter Editor from the home
> page, check bit 2 - "Image color, quality ..." -> "View/Edit Current", set
> "COLOR: line New value to 5 (it is jp4) and click "Apply" button.
> 3) make this mode default(after either 1) or 2) )- save current settings
> in "Parameter Editor" (previous page) - Press topmost "Save" button (you
> may later change comments for the settings). Then you may set saved
> settings as default (select it and then press "Update default"). Next time
> you start the camera it will use these settings.
> Then repeat the same for the other channel.
>
> Andrey
>
>
> ---- On Mon, 05 Mar 2018 01:46:22 -0800 *Winston Zhang<*
> *winston.zhang at blacksesame.com.cn* <winston.zhang at blacksesame.com.cn>*>*
> wrote ----
>
> Hello, Andrey,
>
> I need information inside camera. How can I get jp4 format image? What is the image default format? If I try the command line “wget http://192.168.0.9:2323/img -O filename.jp4”, Can I get the jp4 format Image?
>
> Thank you!
>
> ”
>
>
>
>
>
>
>
> *Best Regrad!*
>
> *Yicheng-Zhang*
>
> *Email: **winston.zhang at blacksesame.com.cn*
> <winston.zhang at blacksesame.com.cn>
>
> *Teil: 18516291005*
>
> *Addr: 707 room, 7th floor, building 4th, No.1761, Zhangdong road,
> Pudong area*
>
>
>
> *发件人**:* Andrey Filippov [mailto:andrey at elphel.com]
> *发送时间**:* 2018年3月2日 星期五 10:47
> *收件人**:* Winston Zhang <winston.zhang at blacksesame.com.cn>; Elphel Support
> <support-list at support.elphel.com>
> *抄送**:* Tao Zhang <tao.zhang at blacksesame.com.cn>; Elphel Support <
> support-list at support.elphel.com>; Elphel Sales | Olga Filippova <
> sales at elphel.com>; Qun Gu <qun.gu at blacksesame.com>; Pioneer Li <
> pioneer.li at blacksesame.com.cn>
> *主题**:* Re: 答复: 答复: [Elphel-support] sync stereo with lidar
>
>
>
> Hello Winston,
>
> Do you need information inside camera or for post-processing on a host PC?
>
> Sensor has 12 bits, and using JP4 format (https://wiki.elphel.com/wiki/JP4)
> you can restore image data with the error less than the pixel shot noise
>
> Here is an article explaining why it is so:
>
>
>
> http://linuxdevices.io/how-many-bits-are-really-needed-in-
> the-image-pixels/
>
>
>
> With ImageJ plugin you can convert JP4 file to 32-bit TIFF
>
>
>
> Andrey
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> ---- On Thu, 01 Mar 2018 17:17:14 -0800 *Winston Zhang<*
> *winston.zhang at blacksesame.com.cn* <winston.zhang at blacksesame.com.cn>*>*
> wrote ----
>
> Hello,
>
> Does this camera image pixel have 10 bit of the single channel? And
> how can I get it? Thank you.
>
>
>
>
>
>
>
> *Best Regrad!*
>
> *Yicheng-Zhang*
>
> *Email: **winston.zhang at blacksesame.com.cn*
> <winston.zhang at blacksesame.com.cn>
>
> *Teil: 18516291005*
>
> *Addr: 707 room, 7th floor, building 4th, No.1761, Zhangdong road,
> Pudong area*
>
>
>
> *发件人**:* Andrey Filippov [mailto:andrey at elphel.com]
> *发送时间**:* 2018年2月1日 星期四 13:49
> *收件人**:* Tao Zhang <tao.zhang at blacksesame.com.cn>
> *抄送**:* Elphel Support <support-list at support.elphel.com>; Elphel Sales |
> Olga Filippova <sales at elphel.com>; Winston Zhang <
> winston.zhang at blacksesame.com.cn>; Qun Gu <qun.gu at blacksesame.com>;
> Pioneer Li <pioneer.li at blacksesame.com.cn>
> *主题**:* Re: 答复: [Elphel-support] sync stereo with lidar
>
>
>
> Tao,
>
> USB GPS does not have 1pps signal (only serial has), precise
> synchronization is not possible that way. GPS time is available in each
> frame Exif header data - recorded on internal SSD or sent over the network.
>
> The high resolution time stamps (1 microsecond step) are also provided
> with each image, but they use internal camera clock, not the GPS.
>
> This is why for precise synchronization you need to use event logger- it
> records events and timestamps them using the same clock.
>
> If you had serial GPS with https://wiki.elphel.com/wiki/103696 - you
> would still need to use event logger - with serial GPS there will be 1 PPS
> precise GPS events timestamped with camera internal clock, and the images
> timestamped wit the same clock - that provides absolute calibration for the
> camera internal clock.
>
> Without serial GPS you may use pulses from the LIDAR (it is possible to
> provide LIDAR pulse number over the Ethernet in addition to the precise
> time over the sync cable)
>
> Andrey
>
>
> ---- On Wed, 31 Jan 2018 18:12:00 -0800 *Tao Zhang<*
> *tao.zhang at blacksesame.com.cn* <tao.zhang at blacksesame.com.cn>*>* wrote
> ----
>
> Hi Andrey,
>
> We prefer to use GPS to synchronize stereo with lidar.
>
> Where do those images that contain timestamp store in internal disk? Can
> we get it from ethernet continuously?
>
>
>
> Tao Zhang
>
> 章 涛
>
>
>
> *发件人**:* Andrey Filippov [mailto:andrey at elphel.com]
> *发送时间**:* 2018年2月1日 1:52
> *收件人**:* Tao Zhang <tao.zhang at blacksesame.com.cn>
> *抄送**:* Elphel Support <support-list at support.elphel.com>; Elphel Sales |
> Olga Filippova <sales at elphel.com>; Winston Zhang <
> winston.zhang at blacksesame.com.cn>; Qun Gu <qun.gu at blacksesame.com>;
> Pioneer Li <pioneer.li at blacksesame.com.cn>
> *主题**:* Re: [Elphel-support] sync stereo with lidar
>
>
>
> Hi Tao,
>
> There are several ways how to do that:
> One method would be be to get camera sync pulses for each frame and use
> external electronics to match with the LIDAR.
> Another is to provide pulses from the LIDAR to the camera and record them
> with in-camera FPGA logger (https://wiki.elphel.com/wiki/Event_logger),
> together with the camera frames. In this case the camera will record 2
> types of events:
> - image frames with the frame number, frame timestamp that will be
> recorded in each frame header as Exif.
> - external pulse
> Each of the two types of events will have a logger timestamp (with
> microsecond resolution). Logger can also record GPS timestamps (for serial
> GPS only and 103696 board -https://wiki.elphel.com/wiki/103696) and IMU (
> https://wiki.elphel.com/wiki/103695), in your case there are just 2 types
> listed above.
>
> Both output (+5V pulses) and input (3.3V..5.0V) are available through the
> 2.5mm audio connector (marked "sync" https://wiki.elphel.com/images
> /0/0f/NC393-CS_marked_ports.jpeg ), here is the pinout and description:
> https://wiki.elphel.com/wiki/103891 .
>
> Andrey
>
>
> ---- On Wed, 31 Jan 2018 04:19:04 -0800 *Tao Zhang<*
> *tao.zhang at blacksesame.com.cn* <tao.zhang at blacksesame.com.cn>*>* wrote
> ----
>
> Hi Andrey,
>
> We are going to use stereo with lidar. We need to sync stereo frames with
> lidar point cloud. Do you have any suggestions on how to do that?
>
> Thanks.
>
>
>
> Tao Zhang
>
> 章 涛
>
>
>
> _______________________________________________
> Support-list mailing list
> Support-list at support.elphel.com
> http://support.elphel.com/mailman/listinfo/support-list_support.elphel.com
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> _______________________________________________
> Support-list mailing list
> Support-list at support.elphel.com
> http://support.elphel.com/mailman/listinfo/support-list_support.elphel.com
>
>
>
>
>
>
>
>
>
>
>
>
>
> _______________________________________________
> Support-list mailing list
> Support-list at support.elphel.com
> http://support.elphel.com/mailman/listinfo/support-list_support.elphel.com
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://support.elphel.com/pipermail/support-list_support.elphel.com/attachments/20180308/f95a3405/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.png
Type: image/png
Size: 385895 bytes
Desc: not available
URL: <http://support.elphel.com/pipermail/support-list_support.elphel.com/attachments/20180308/f95a3405/attachment-0001.png>
More information about the Support-list
mailing list