Search found 215 matches
- Thu Dec 26, 2019 3:57 pm
- Forum: Cameras and video capture modules
- Topic: mmal: No data received from sensor
- Replies: 3
- Views: 10064
Re: mmal: No data received from sensor
Sorry for the delay, I was quite unavailable those days. I investigated further and it seems that it comes from the camera chip itself. The last test I did is pretty clear: on a working setup, when I exchange only the camera chip (black square with short ribbon), I got the reported message, and it w...
- Wed Dec 11, 2019 6:19 pm
- Forum: Cameras and video capture modules
- Topic: mmal: No data received from sensor
- Replies: 3
- Views: 10064
mmal: No data received from sensor
One of the v2 camera of the kit I recently got has a strange behavior. It is detected # vcgencmd get_camera supported=2 detected=2 but it seems to stall the raspistill/vid programs. When used alone, I get this message # raspistill -o /media/DCIM/test.jpg -t 1 Camera control callback cmd=0x4f525245mm...
- Thu Dec 05, 2019 9:51 am
- Forum: Your Project
- Topic: I’ve built a telepresence robot using Stereo Pi
- Replies: 4
- Views: 12948
Re: I’ve built a telepresence robot using Stereo Pi
Awesome project, indeed. As realizator highlighted, it can do far more than what a telepresence robot usually can. You probably should improve your communion on this, especially if you plan to have a business with it. Although I know it is a prototype, I would suggest you to handle the cable passing...
- Thu Dec 05, 2019 9:19 am
- Forum: OpenCV, Python and other image processing
- Topic: Getting Actual Distance Data (in cm) from Depth Map
- Replies: 4
- Views: 10415
Re: Getting Actual Distance Data (in cm) from Depth Map
I never did that, but if I remember my readings well, Z=F.B/D (depth = focal × base ÷ disparity) when infinity is at 0 disparity. You can calibrate your cameras to get the focal length and the stereo base in the right units. Alternatively, you can consider that F.B is constant (the distance between ...
- Wed Dec 04, 2019 6:17 pm
- Forum: Video, photo (livestream, recording, photo capturing)
- Topic: Colour Filtering Live Stream
- Replies: 6
- Views: 11230
Re: Colour Filtering Live Stream
I did not try it yet (planned though), but maybe you can also use PiCamera python module to get RGB version of the frames and do the image processing you need in GPU with OpenCV for example. Displaying the result on HDMI should not be very hard and it would give you more flexibility in the process t...
- Mon Oct 28, 2019 3:23 pm
- Forum: Other hardware
- Topic: Supported WiFi modules
- Replies: 8
- Views: 27545
Re: Supported WiFi modules
Stereomaton, could you also please give me the model, manufacturer, and (if possible) link to manufacturer? This will simplify dongles search for purchase. Sorry, it is a dongle from the drawer. The only thing I can add is that it is written POSS PSNKWIFI150 on the device. Inside, it is a Realtek R...
- Fri Oct 25, 2019 5:14 pm
- Forum: Your Project
- Topic: StereoPi Field Report contest - afterthought
- Replies: 0
- Views: 20558
StereoPi Field Report contest - afterthought
The September Grand Prix is finished and the laureates are known. Congratulations to all who participated, it was a pleasure to read about the projects of other people, but there were very few of them submitted. Except if some projects are still in the pipe, I counted 3 submissions published whose a...
- Fri Oct 25, 2019 3:52 pm
- Forum: Other hardware
- Topic: Supported WiFi modules
- Replies: 8
- Views: 27545
Re: Supported WiFi modules
any idea? I wanted to read the script to help you, but the "Your Pi revision number is" message is not present in the current version of the script. Maybe the way to detect CPU architecture changed and you can retry it. You should probably open a new thread when you have new subject to discuss like...
- Fri Oct 25, 2019 3:44 pm
- Forum: Other hardware
- Topic: Supported WiFi modules
- Replies: 8
- Views: 27545
Re: Supported WiFi modules
"Bus 001 Device 033: ID 0bda:8179 Realtek Semiconductor Corp. RTL8188EUS 802.11n Wireless Network Adapter"Realizator wrote: ↑Tue Oct 22, 2019 9:33 amI decided to open this thread to list all supported modules tested, and also drivers installation procedure for unsupported modules.
Works out of the box.
- Fri Oct 25, 2019 3:35 pm
- Forum: Other topics
- Topic: Forum search settings have been updated
- Replies: 1
- Views: 10782
Re: Forum search settings have been updated
Cool. 100% of my searches were filtered out before.
I have nothing to search right now, but it is a good thing.
I have nothing to search right now, but it is a good thing.
- Mon Oct 21, 2019 6:14 am
- Forum: Your Project
- Topic: DIY VR headset for the StereoPi. 10 ms latency for just $135
- Replies: 4
- Views: 12504
Re: DIY VR headset for the StereoPi. 10 ms latency for just $135
Filming a timer and a screen which displays it through the camera... It reminds me a similar latency test I did on an endoscope several years ago. However, I am surprised by the measure you give. Standard 60fps is about 16ms, thus anything under 32ms (Shannon frequency) or even 0.1s (realistic error...
- Wed Oct 16, 2019 7:49 pm
- Forum: Your Project
- Topic: Itinerant self-service stereoscopic photo automaton… the Stereomaton
- Replies: 7
- Views: 15140
Re: Itinerant self-service stereoscopic photo automaton… the Stereomaton
For completeness, I should add the link to the third part of the series which talks about the usage during the event:
https://www.crowdsupply.com/virt2real/s ... -goes-live
https://www.crowdsupply.com/virt2real/s ... -goes-live
- Sat Oct 12, 2019 7:36 am
- Forum: Your Project
- Topic: 180×180 Apple tree fisheye test
- Replies: 0
- Views: 15632
180×180 Apple tree fisheye test
This photo was made by using a pair of wide-angle (187° circular fisheye) SOHO cameras mounted on the stereomaton (in automated mode). Although any additional filters were applied, the exposure is not good and the color balance is worst (bigger artifacts manually corrected afterwards). I think there...
- Wed Oct 09, 2019 10:29 pm
- Forum: OpenCV, Python and other image processing
- Topic: Upgrading/New Drivers
- Replies: 4
- Views: 4539
Re: Upgrading/New Drivers
there is a difference between make and sudo make . The difference is that executing through the sudo command, the make program get root privileges. You can remember it as sudo=" s uper u ser do ". It is always better to reserve execution with high privileges to the tasks that really need it, such a...
- Sat Oct 05, 2019 8:23 am
- Forum: StereoPi hardware
- Topic: Ethernet failure?
- Replies: 11
- Views: 8719
Re: Ethernet failure?
Thanks. As I work mostly with headless systems, I did not think at all about this way that might be obvious for others. It sounds strange that the hardware used to work and broke. Maybe a weak soldering on the connector that was damaged with manipulation (connectors and their connections are often w...
- Fri Oct 04, 2019 11:53 pm
- Forum: StereoPi hardware
- Topic: Ethernet failure?
- Replies: 11
- Views: 8719
Re: Ethernet failure?
I don't get how you can have a terminal to type the command if the board has no network access. Anyway, even if I am very surprised and puzzled, glad you solved your problem.
As a simple user, I cannot answer the warranty part.
As a simple user, I cannot answer the warranty part.
- Fri Oct 04, 2019 6:35 pm
- Forum: StereoPi hardware
- Topic: camera calibration for stereo photo
- Replies: 1
- Views: 3065
Re: camera calibration for stereo photo
Doing it automatically is not very simple, and you have to have a valid calibration of your system beforehand. If you want to do it yourself, you can get inspiration from the code of the stereomaton: https://github.com/haum/stereomaton/blob/master/code/stereomaton.py Lines 209 to 222 do the alignmen...
- Wed Oct 02, 2019 7:26 pm
- Forum: StereoPi hardware
- Topic: Ethernet failure?
- Replies: 11
- Views: 8719
Re: Ethernet failure?
Woo. Strange story. How do you determine the IP it get? Could you draw a sketch of your network installation? If you had to change your hardware several times, there might be something you do not understand or something in your installation that interfer. With such problems, I would start to try to ...
- Wed Oct 02, 2019 6:49 pm
- Forum: StereoPi hardware
- Topic: StereoPi schematics
- Replies: 5
- Views: 40818
Re: StereoPi schematics
The schematics are already published in PDF. Also, the kicad suite is a free software (both like in liberty and in price) so you can easily install it to inspect the design (which would not be possible with Altium). These are two possible ways to have access to the schematics before realizator answe...
- Sat Sep 28, 2019 5:04 am
- Forum: StereoPi hardware
- Topic: GPIO issue
- Replies: 5
- Views: 5351
Re: GPIO issue
I did not know this extension before, but it likely not use bare GPIO, but rather the peripherals such as I2C bus which are also available on the GPIO extension connector. There might be peripherals and drivers to enable, which is generally done through the device-tree or device-tree overlay mechani...