Search found 189 matches

by stereomaton
Sun Mar 29, 2020 11:33 pm
Forum: StereoPi hardware
Topic: Genlock
Replies: 10
Views: 3123

Re: Genlock

I had a bit of time today to shoot even if it was cloudy, cold and windy and that I had only the V1 cameras available. I realized that I use a crapy SD card and that can be what causes the issue (settings were in the capabilities of the cameras in the first test), so I lowered the video options. So ...
by stereomaton
Sun Mar 29, 2020 10:45 pm
Forum: Video, photo (livestream, recording, photo capturing)
Topic: SLP update discussion
Replies: 10
Views: 2573

Re: SLP update discussion

Today, I thought that perhaps you could also add the "classical" 24/25/50 fps video framerates in the selection menu.
by stereomaton
Fri Mar 27, 2020 3:56 pm
Forum: Other software
Topic: Mounting image to check original parameters
Replies: 3
Views: 1519

Mounting image to check original parameters

Today, I wanted to get the default parameters of StereoPi. I downloaded the image file and here is a tip to avoid to burn it, thanks to Linux. With fdisk, we can get the organisation of the partitions in the image: $ fdisk -l stereopi-0-2-3.img Disk stereopi-0-2-3.img: 1.9 GiB, 2013265920 bytes, 393...
by stereomaton
Fri Mar 27, 2020 2:37 pm
Forum: The art of stereoscopic photo
Topic: Low Profile (staggered) Stereovision?
Replies: 10
Views: 3840

Re: Low Profile (staggered) Stereovision?

It's interesting, but I do not have time to think about this in details. If you try it, let us know. As Realizator, I doubt it would let you gain base size because you would have somehow to project one of your images into the reference of the second one. Furthermore, you would probably have some unw...
by stereomaton
Tue Mar 24, 2020 6:50 pm
Forum: StereoPi hardware
Topic: Genlock
Replies: 10
Views: 3123

Re: Genlock

Hi Oteppi, I never really used the video record part of SLP (which is the preinstalled system on StereoPi) and I have some trouble to use it. The videos I did yesterday were swapped (and there was a very strange delay between the cameras as if the processing was not able to follow the capture rate)....
by stereomaton
Tue Mar 24, 2020 6:41 am
Forum: Video, photo (livestream, recording, photo capturing)
Topic: SLP update discussion
Replies: 10
Views: 2573

Re: SLP update discussion

I would add that it would be nice to have a button to record a video more easily, like the photo button does.
It would be even better if this button show the current recording state.
by stereomaton
Mon Mar 23, 2020 12:46 pm
Forum: Video, photo (livestream, recording, photo capturing)
Topic: SLP improvement: multiple wifi networks configured
Replies: 1
Views: 1985

SLP improvement: multiple wifi networks configured

Observed in version 0.2.3 of SLP I usually connect my stereopi to home WiFi network (to easily work on it with the computer) and mobile-phone WiFi network (for in-field control). However, SLP allows to store the ids of only one of these networks at a time. By modifying the scripts, it is possible to...
by stereomaton
Mon Mar 23, 2020 12:21 pm
Forum: Video, photo (livestream, recording, photo capturing)
Topic: SLP improvement: 404 in file manager
Replies: 1
Views: 1247

SLP improvement: 404 in file manager

Observed in version 0.2.3 of SLP Using the "File manager" icon on the webpage, the "open" link of a file detail page points to the wrong URL. The preview of a JPG has broken source URL as well. To reproduce: take a photo, use the file manager to navigate to /media/DCIM/<photoname>, click on open lin...
by stereomaton
Sat Mar 21, 2020 7:23 am
Forum: StereoPi hardware
Topic: Genlock
Replies: 10
Views: 3123

Re: Genlock

I know what you are talking about. In practice, the sync error with StereoPi is by very far inferior to the framerate, so that the kind of problems you mention do not show up. I'll try to capture a demo video with moving things so that you could check by yourself. Ask me again in a few days if I for...
by stereomaton
Fri Mar 20, 2020 8:55 am
Forum: StereoPi hardware
Topic: 3D scanning with structured light
Replies: 2
Views: 2144

Re: 3D scanning with structured light

It looks like the OpenCV library has a module to deal with this: https://docs.opencv.org/master/d3/d81/tutorial_structured_light.html I do not know how to use it in practice, but it is probably a good starting point. Perhaps is there software or high level libraries built on top of this library. As ...
by stereomaton
Fri Mar 20, 2020 8:41 am
Forum: StereoPi hardware
Topic: Genlock
Replies: 10
Views: 3123

Re: Genlock

As far as I understand, not strictly speaking. However in practice the cameras are scanned with very low latency. In this post , a user shared videos taken from a plane drone. The vibrations of the machine interfere with the rolling-shutter of the camera and the resulting artifacts (image "wobbling"...
by stereomaton
Mon Mar 09, 2020 7:21 am
Forum: Cameras and video capture modules
Topic: Getting video only from single camera
Replies: 1
Views: 2620

Re: Getting video only from single camera

What system do you use?
What command do you use?

It might be missing parameters in the command but give us more information.
by stereomaton
Fri Mar 06, 2020 8:18 am
Forum: StereoPi hardware
Topic: Left and Right Cameras Reversed
Replies: 9
Views: 4350

Re: Left and Right Cameras Reversed

The left and right cameras depends on how you bend the ribbons, even without crossing them.
Changing the primary camera (-cs 1) or mirroring the images (-vf -hf) are two valid options you can use also on raspbian flavor as soon as you use raspistill or raspivid.
by stereomaton
Thu Mar 05, 2020 9:09 am
Forum: Video, photo (livestream, recording, photo capturing)
Topic: A physical button to take photos
Replies: 35
Views: 10846

Re: A physical button to take photos

Nice rewording into step by step guide.
by stereomaton
Thu Mar 05, 2020 9:02 am
Forum: Your Project
Topic: How to work with Stereo Pi
Replies: 32
Views: 12133

Re: How to work with Stereo Pi

I agree with Realizator: if you choose the opencv way, which is a bit advanced, following the step by step video tutorial is a good idea. You do not need your PC for the opencv way. All is done on the stereopi, including the compilation, display and even desktop-like interaction with software. Just ...
by stereomaton
Sun Mar 01, 2020 8:09 pm
Forum: StereoPi hardware
Topic: No camera feed visible and only one Camera LED illuminated
Replies: 12
Views: 5437

Re: No camera feed visible and only one Camera LED illuminated

Again I do not have a board to check right now. The command "ps" do not list all processes by default. In particular the processes launched by other users and processes without associated terminal are filtered out if I remember well. I personally often use "ps aux" which lists more processes than th...
by stereomaton
Sun Mar 01, 2020 11:29 am
Forum: StereoPi hardware
Topic: No camera feed visible and only one Camera LED illuminated
Replies: 12
Views: 5437

Re: No camera feed visible and only one Camera LED illuminated

Just a few notes to help you before Realizator can give a better answer. I think that only the left camera led is on, even in stereo capture. I do not have my stereopi here to confirm. The commands you give result in a mmal error because there is probably a software that use the cameras. Typically o...
by stereomaton
Fri Feb 28, 2020 8:59 am
Forum: Your Project
Topic: How to work with Stereo Pi
Replies: 32
Views: 12133

Re: How to work with Stereo Pi

You did not expose what you wanted to do exactly: except if I miss something, we only know that you want access raw video data. If it means capturing videos to process them on PC afterwards, you can do it with SLP. It has an interface to record the videos. You can also use the raspivid program from ...
by stereomaton
Thu Feb 27, 2020 7:05 am
Forum: Your Project
Topic: How to work with Stereo Pi
Replies: 32
Views: 12133

Re: How to work with Stereo Pi

I did not follow the whole context, but the command you report mixes Linux and Windows notations. To build an opencv program for stereopi, the simplest way is probably to build it on the stereopi itself (man could cross-compile but it requires bigger setup and competences) When you connect with putt...