StereoPi Forum

Nice rewording into step by step guide.

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 ...

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...

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...

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 ...

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...

Does a long time to load considered as a bug?
On my current connection (24Mbps down / 30ms ping to stereopi.com), it takes 39s on mobile phone before being able to start to read (4-5 seconds on PC). I have not read the article yet.

I did not dig into the way proposed by Realizator, but with a quick review of the posted code, I see that you test a probably unset variable AP_IFACE, thus the function AP_run is probably not called.

If you use SLP variant of the operating system (which is the default delivered with the kit), remote console access is enabled by default through SSH protocole. See https://wiki.stereopi.com/index.php?title=SLP_(StereoPi_Livestream_Playground)_Raspbian_Image#Advanced_users.E2.80.99_section for crede...

(quick answer) 1. On my Android phone, it is in Parameters>wireless& network>plus...>sharing connection>wifi hotspot (rough translation, my phone is not in English) Do not know if such feature is available on your device since there is possibly no other network to share on the hotspot. 2. I read the...

As the software tries to reconstruct map from two changing images (images in videos often fluctuate, especially with fluorescent lighting) the result can fluctuate too, I guess. What is the order of magnitude of the depth estimation variance? I didn't undersand what you said. I can try to reformula...

With the in-depth answer from Realizator, my question has less interest. Normalization part is what I supposed behind my question which is confirmed in the answer.
Nonetheless, it might be interesting for you to check actual values.

You solved it while I wrote an answer. I post it nonetheless because some people reading your topic in the future might find it useful. That said, I am a bit confused. If you used the USB-serial interface (as I supposed in my answer) the 5V power should already be provided. If you use actual hardwar...

As the software tries to reconstruct map from two changing images (images in videos often fluctuate, especially with fluorescent lighting) the result can fluctuate too, I guess.
What is the order of magnitude of the depth estimation variance?

Well, biased by my vision, I imagined something different. In particular, I have interpreted the term camera as a regular photo camera with minimum control on exposure time and iso, but forgot that for non-photographers it means snapshot taker.

If you power only the stereopi, its cameras and wifi dongle from your 15W source, the power should be enough. I personally use a simple 10W power bank with similar setup without problem. I didn't catch why you talked about USB (a distinct problem?), but I should remind you something about it. On the...

The script is totally related to cameras (it computes focal length, centering of the sensor on the optical axis, lens distortion and so on), so it does not matter if you change the operating system. Also SLP is based on raspbian. The parameters (matrices) are stored in binary with/by a library calle...

It sounds like power issue again.
Can you describe your full setup: which board powered by which method (connector) with which source (battery/adaptor) and whenever possible at which power rating?

Nice introduction. The stereo window, briefly exposed in the video, is a bit more detailed here on this forum . The distance to the front-most element is briefly evoked in this post, but better developed in the article (following the 1/30 rule is an easy way to fulfill the "There shall not be too mu...

Nice. Interestingly, the artifacts created by the combination of roller-shutter and drone vibrations are in very good sync, but the physical alignment of the cameras is far from perfect. I opened the video in a sView (the 3D video player part) which has the advantage of being able to adjust the vert...