Search found 215 matches

by stereomaton
Sat Jun 13, 2020 8:36 pm
Forum: Other software
Topic: Mounting image to check original parameters
Replies: 3
Views: 13992

Re: Mounting image to check original parameters

Nice proposition.
I always forget that losetup can do this out of the box now. A few years ago, doing it with a multi-partition image was a nightmare (needed special kernel configuration if I remember well).
Sure it is far easier with your way.
by stereomaton
Sat Jun 13, 2020 9:53 am
Forum: Video, photo (livestream, recording, photo capturing)
Topic: A physical button to take photos
Replies: 37
Views: 81413

Re: A physical button to take photos

Hey all, I'm working on my own version of this, but am having trouble getting my script to run as part of run.sh The first thing I notice is that the shebang is at the wrong place. To execute a text file, the kernel needs to know with which interpreter to run it and it is described by the first lin...
by stereomaton
Thu Jun 11, 2020 3:06 pm
Forum: Your Project
Topic: Another Stereoscopic Camera Project
Replies: 15
Views: 24429

Re: Another Stereoscopic Camera Project

I'll check out the code and take maybe steal some bits :D It is shared to be useful. Did you have trouble with your SPI screen then? SPI is a "slow" bus, or more precisely it does not benefit from several accelerators for the video (partly due to poor driver for those screens and partly for a more ...
by stereomaton
Tue Jun 09, 2020 1:57 pm
Forum: Your Project
Topic: Another Stereoscopic Camera Project
Replies: 15
Views: 24429

Re: Another Stereoscopic Camera Project

I think stereomaton has come up with a solution for this, or part of one? It would be nice to hear what people's thoughts are on this concept and how they'd go about doing it. The code (and other details) of the stereomaton is available here: https://github.com/haum/stereomaton However, it is mostl...
by stereomaton
Tue Jun 09, 2020 1:11 pm
Forum: Video, photo (livestream, recording, photo capturing)
Topic: 3d pyramid hologram stream
Replies: 3
Views: 2793

Re: 3d pyramid hologram stream

I never tried this kind of pyramidal display because I always thought that it was just a bad joke. In particular, there is a single image for the two eyes (per side), so it is likely just like a head-up display (2D image in the air), repeated 4 times. The shadows and movement can probably trick some...
by stereomaton
Tue Jun 09, 2020 10:50 am
Forum: Other topics
Topic: New article published
Replies: 6
Views: 30015

Re: New article published

It looks better. The page is still long to load, but at least we can start to read it. It looks like you can have a big gain by lazy loading the youtube iframes. I was not sure at first, but I found a way to block them and my loading time changed from 8s (or 16s depending on where I consider all fin...
by stereomaton
Wed May 20, 2020 5:06 pm
Forum: The art of stereoscopic photo
Topic: Low Profile (staggered) Stereovision?
Replies: 10
Views: 24030

Re: Low Profile (staggered) Stereovision?

I thought of this geometric problem again, and I came to something that I knew but missed in my previous answers. Actually, you can totally align the images produced by the "staggered disposition", but the result will probably not be what you want. After alignment, the disparity will denote depth in...
by stereomaton
Wed May 20, 2020 2:12 pm
Forum: Other topics
Topic: New article published
Replies: 6
Views: 30015

Re: New article published

I just tested on good mobile connection (30Mbps) and it took 55s today. There must be something in the script of the blog. The problem is that partial content is not displayed so that we cannot start reading before the end of load.

Anyway, I already read it now. :-)
by stereomaton
Tue Apr 28, 2020 12:24 pm
Forum: Your Project
Topic: is there a way to connect 4 cameras?
Replies: 5
Views: 13014

Re: is there a way to connect 4 cameras?

The StereoPi itself has two dedicated camera ports, and you can connect only one camera per port. One solution for your Nimslo-like shot would be to use two StereoPi boards working together. A simple and dirty way would be to use an external button as described in this thread and connect the button ...
by stereomaton
Mon Apr 27, 2020 4:19 pm
Forum: OpenCV, Python and other image processing
Topic: Trouble with stereoPi calibration
Replies: 2
Views: 10683

Re: Trouble with stereoPi calibration

[Suggestions for realizator] In the linked function, the vector ekk looks like a vector of the absolute projection errors (I do not remember which projections are supposed to be done, I suppose one is left points on right image given the current parameters relating the two cameras, but for sure ekk ...
by stereomaton
Mon Apr 27, 2020 2:40 pm
Forum: StereoPi hardware
Topic: New guide: StereoPi used as USB device
Replies: 13
Views: 13935

Re: New guide: StereoPi used as USB device

I come back to the forum after you had a long discussion. I did not understand well how was the setup and I have the feeling that there was a confusion in the addresses to ping, but fortunately the problem is solved. When I tested it, I changed this file from an already existing one I had on my setu...
by stereomaton
Fri Apr 24, 2020 7:23 pm
Forum: StereoPi hardware
Topic: New guide: StereoPi used as USB device
Replies: 13
Views: 13935

Re: New guide: StereoPi used as USB device

These addresses are the APIPA range, which denotes that the PC cannot communicate with the DHCP server. If I understand well, you used the StereoPi as device in both cases, and a Windows PC as host, and then a RPi4 as host because the first case did not work. In both cases, you got APIPA address on ...
by stereomaton
Wed Apr 22, 2020 8:31 am
Forum: StereoPi hardware
Topic: WiFi dongle not connecting to Windows mobile hotspot
Replies: 2
Views: 3208

Re: WiFi dongle not connecting to Windows mobile hotspot

WiFi issues are always hard to debug. Since your setup works with other beacons, I would first check the channels: depending in the regions, different channels are allowed and your phone might emit in a channel that your dongle do not scan. For the troll, Windows is known to be insecure by default a...
by stereomaton
Wed Apr 15, 2020 8:11 am
Forum: Your Project
Topic: DIY VR headset for the StereoPi. 10 ms latency for just $135
Replies: 4
Views: 12461

Re: DIY VR headset for the StereoPi. 10 ms latency for just $135

The H264 encoder is limited in definition (I found about 2048×1350) and you exceed it with your configuration. Since you do not save the file, you can try to use the mjpeg encoder (-cd mjpg). Also check the camera modes, because you may have a trade off to do between fps and definition. Note: this p...
by stereomaton
Sat Apr 11, 2020 8:22 pm
Forum: Other software
Topic: Manual wifi configuration with buster
Replies: 0
Views: 19050

Manual wifi configuration with buster

I had problems to connect with my WiFi dongle with the buster image. It looks like the wlan0 interface is created by the system, but there is a problem with the GUI and more probably with the wpa/dbus gateway. I suspect that it is linked with the fact that this dongle uses a "wext" driver not handle...
by stereomaton
Fri Apr 10, 2020 5:25 pm
Forum: OpenCV, Python and other image processing
Topic: [solved] can't boot with non-slp c++ python open-cv image
Replies: 8
Views: 8151

Re: [solved] can't boot with non-slp c++ python open-cv image

This link looks good, and the stereopi starts.

It is quite surprising that there are some incompatibilities like that in such old format. It really looked like a transfer error to me, that's why I asked for the checksum of the archive (.zip file). Too late, I did not kept the file anyway.
by stereomaton
Thu Apr 09, 2020 4:13 pm
Forum: OpenCV, Python and other image processing
Topic: [solved] can't boot with non-slp c++ python open-cv image
Replies: 8
Views: 8151

Re: [solved] can't boot with non-slp c++ python open-cv image

Using the previous image "Raspbian Buster OpenCV Image (Python code)" (stereopi-opencv-20190912.zip), even originating from Google Drive as the other image, seems to work well both with unzip and 7z (same checksum).
It boots [but I forgot that I needed a mouse to start with it :-)]
by stereomaton
Thu Apr 09, 2020 3:20 pm
Forum: OpenCV, Python and other image processing
Topic: [solved] can't boot with non-slp c++ python open-cv image
Replies: 8
Views: 8151

Re: [solved] can't boot with non-slp c++ python open-cv image

It does not work better. $ 7z e cpp-python-2020-02-05.zip 7-Zip [64] 16.02 : Copyright (c) 1999-2016 Igor Pavlov : 2016-05-21 p7zip Version 16.02 (locale=fr_FR.UTF-8,Utf16=on,HugeFiles=on,64 bits,8 CPUs Intel(R) Core(TM) i7-8550U CPU @ 1.80GHz (806EA),ASM,AES-NI) Scanning the drive for archives: 1 f...
by stereomaton
Thu Apr 09, 2020 12:38 pm
Forum: OpenCV, Python and other image processing
Topic: [solved] can't boot with non-slp c++ python open-cv image
Replies: 8
Views: 8151

can't boot with non-slp c++ python open-cv image

Hum. I have a problem with this image too, but it is a different one. I downloaded it two times, and each time it seems that the zip file is currupted. $ unzip -t cpp-python-2020-02-05.zip Archive: cpp-python-2020-02-05.zip warning [cpp-python-2020-02-05.zip]: 982393912 extra bytes at beginning or w...
by stereomaton
Tue Apr 07, 2020 10:41 am
Forum: OpenCV, Python and other image processing
Topic: Faster framerate
Replies: 9
Views: 17341

Re: Faster framerate

I am aware that it is inefficient to turn all 5 IO on for the LEDs, I am working on a second version of the LED board in which all LEDs will be toggled on with a single GPIO. Oops, I remembered only of the first part of this sentence and sketched a schematic. Since I drew it, I will share it noneth...