Search found 108 matches

by stereomaton
Fri Jan 17, 2020 8:58 am
Forum: StereoPi hardware
Topic: StereoPi to Oculus Go direct WiFi connection
Replies: 8
Views: 148

Re: StereoPi to Oculus Go direct WiFi connection

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.
by stereomaton
Fri Jan 17, 2020 8:41 am
Forum: Other software
Topic: command line
Replies: 2
Views: 45

Re: command line

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...
by stereomaton
Fri Jan 10, 2020 8:24 am
Forum: StereoPi hardware
Topic: StereoPi to Oculus Go direct WiFi connection
Replies: 8
Views: 148

Re: StereoPi to Oculus Go direct WiFi connection

(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...
by stereomaton
Fri Jan 10, 2020 8:09 am
Forum: OpenCV, Python and other image processing
Topic: The depth map colors are constantly changing
Replies: 6
Views: 105

Re: The depth map colors are constantly changing

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...
by stereomaton
Thu Jan 09, 2020 8:38 am
Forum: OpenCV, Python and other image processing
Topic: The depth map colors are constantly changing
Replies: 6
Views: 105

Re: The depth map colors are constantly changing

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.
by stereomaton
Thu Jan 09, 2020 8:26 am
Forum: StereoPi hardware
Topic: StereoPi and Arduino I2C
Replies: 3
Views: 49

Re: StereoPi and Arduino I2C

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...
by stereomaton
Wed Jan 08, 2020 5:17 pm
Forum: OpenCV, Python and other image processing
Topic: The depth map colors are constantly changing
Replies: 6
Views: 105

Re: The depth map colors are constantly changing

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?
by stereomaton
Sun Jan 05, 2020 5:30 am
Forum: The art of stereoscopic photo
Topic: 3D macro photo. The 3rd article is here
Replies: 4
Views: 152

Re: 3D macro photo. The 3rd article is here

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.
by stereomaton
Thu Jan 02, 2020 10:34 am
Forum: Video, photo (livestream, recording, photo capturing)
Topic: Problems using the Android app with Android hotspot and an edimax wifi dongle
Replies: 17
Views: 303

Re: Problems using the Android app with Android hotspot and an edimax wifi dongle

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...
by stereomaton
Wed Jan 01, 2020 6:49 am
Forum: OpenCV, Python and other image processing
Topic: Camera calibration
Replies: 3
Views: 88

Re: Camera calibration

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...
by stereomaton
Wed Jan 01, 2020 6:29 am
Forum: Video, photo (livestream, recording, photo capturing)
Topic: Problems using the Android app with Android hotspot and an edimax wifi dongle
Replies: 17
Views: 303

Re: Problems using the Android app with Android hotspot and an edimax wifi dongle

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?
by stereomaton
Thu Dec 26, 2019 9:26 pm
Forum: The art of stereoscopic photo
Topic: 3D macro photo. The 3rd article is here
Replies: 4
Views: 152

Re: 3D macro photo. The 3rd article is here

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...
by stereomaton
Thu Dec 26, 2019 7:13 pm
Forum: Your Project
Topic: simple stereo 3d video
Replies: 4
Views: 202

Re: simple stereo 3d video

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...
by stereomaton
Thu Dec 26, 2019 3:57 pm
Forum: Cameras and video capture modules
Topic: mmal: No data received from sensor
Replies: 3
Views: 209

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...
by stereomaton
Wed Dec 11, 2019 6:19 pm
Forum: Cameras and video capture modules
Topic: mmal: No data received from sensor
Replies: 3
Views: 209

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...
by stereomaton
Thu Dec 05, 2019 9:51 am
Forum: Your Project
Topic: I’ve built a telepresence robot using Stereo Pi
Replies: 4
Views: 229

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...
by stereomaton
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: 160

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 ...
by stereomaton
Wed Dec 04, 2019 6:17 pm
Forum: Video, photo (livestream, recording, photo capturing)
Topic: Colour Filtering Live Stream
Replies: 6
Views: 430

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...
by stereomaton
Mon Oct 28, 2019 3:23 pm
Forum: Other hardware
Topic: Supported WiFi modules
Replies: 6
Views: 2346

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...
by stereomaton
Fri Oct 25, 2019 5:14 pm
Forum: Your Project
Topic: StereoPi Field Report contest - afterthought
Replies: 0
Views: 154

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...