StereoPi Forum

The installer script possibly try to install the software without updating the list of available packages in the repository, thus maybe it tries to download something that was updated between the last update and now. Try to run "apt update" to update list list of packages before running your install...

Realizator, it is possible to flash a ext4 partition with the bare minimum and then extend the FS to the whole partition with "resize2fs /dev/mmcblk0p2". In the application I have in mind, we do it to extend the size available to the user to several GB based on a system image of 120MB. I guess (not ...

The error is just written in the log very explicitly: you do not have enough free space (to download the software your installer try to add).
What is the question?

Ok, I've uploaded DWG, STL and OBJ models of the board I tried to open the DWG but the only software I know to open this format on my system has an experimental support and crashed. I used an online converter to get a DXF. The drawings are heavily detailed, but a part of the components are not in t...

You probably have read the article about the design of the case:
https://www.crowdsupply.com/virt2real/s ... tereomaton
Again, I can answer your questions here if you have some.

It is nice to have a preview of another field report, but it would have been better to open a new post. Nice proposal by the way. I also was frustrated to not find this measure on the wiki when I designed my case, so it would indeed be interesting to add it. The position of the camera connectors rel...

The amperage is what the boards (processor, cameras & co) will try to get from the power source. It can be almost 0 if the components do not consume and grow when you compute (get video frames, encode video, write to the SD, and do on). If your power source can feed it (its rating is superior), all ...

Nice. I am looking forward to discovering of their creations.

Only one report was published yet. Do you know if there are other reports in the queue? Well I know that one about the design of the case of the stereomaton is accepted, but I wonder if there will be applications I do not know of. I'd be happy to discover what other people did with this interesting ...

Wonderful. I found easily the components I searched both on the Kicad project and on the actual board. Unfortunately, the mod I wanted to do, to change USB otg/host automatically with cable plugged, will be trickier than I hopped as the related components are on the opposite sides. I planned to dril...

Yeah, pivots are everywhere! We are also prefer to do real field experiments, as in most cases reality does not fits our expectations, specially for human reaction For sure. It is always interesting to see how our creations are used by the public, and sometimes it is surprising. Actually, we have n...

Then you go for the hard way ;) I already gave an overview of the architecture we use. It is probably not the best solution because we had to make it work before a hard short deadline. As I said, I think that starting from the disparity map tutorial would be a good (probably better) way. In addition...

As the festival is over, we can say that our presentation was a great success. The visitors were amazed by the 3D and particularly because the photos were taken during the festival itself. Our first idea was to allow people to take 3D selfies, but actually a very small part of the public wanted to t...

I just checked on my stereopi. The raspberry-pi CSI cameras do not have video4linux driver associated (at least it is not enabled in SLP by default), thus opencv complains about missing camera "VIDEOIO ERROR: V4L: can't open camera by index 0". I realize that I was confused by names of the python pi...

The (sub)question I answered was about how opencv captures videos, which did not mention stereoscopy. The only way I know with opencv is to capture monoscopic independant videos, or use external capture such as the python module mentioned in a previous post but which was not the subject of the quest...

Realizator answered while I wrote my own answer (again). I know the mmal thing because rpicamera wrote it in their documentation. For opencv, I think they use v4l2 abstraction of the kernel, which is a generic layer for video capture. Linux drivers (except for some specific drivers such as mmal for ...

This rpicamera python module sends commands to the mmal subsystem. The API of this very specific driver or the internals of the coprocessor firmware might have changed with the update (kernel or firmware) that possibly comes with new version of Raspbian. If this is a case, a downgrade of only this p...

I have no experience with the hardware you talk about but I can provide my expertise on embedded Linux in general. The hardware of stereopi is very very similar to the raspberry-pi so that everything not too fancy (Raspbian is obviously the least exotic one) that runs on the compute module should ru...

For the print part, I did not test anything like that. However, I can provide some keywords for your researches. The way to go is probably to use the cups program (Common Unix Printing System). It has a web interface to configure the printers and there are some command line interfaces for your progr...

Concerning the alignment, you have to build a mechanical part to keep the two cameras tied together. The Camera support plates of the kit would do. It is important that the cameras do not move relative to each others because you will calibrate one time, and reapply the found parameters on each photo...