Raspberry Pi Forums

HermannSW

Was Untested though, particularly on the exposure/gain/flip/vts setup. unclear? You had the source code. You had the reference. Therefore there was nothing stopping you fixing it yourselves. If you expect everything spoon-fed to you, then raspiraw is not the program for you. While I may have fixed ...

HermannSW

6mm lens with the aperture shut nearly right down, a dark room, and a Image Engineering LED-panel set to 3secs per LED. 1500 euro. Pretty sure a sense hat could do something like that! I was impressed by the idea 6by9 demonstrated, and even before your 1500€ statement I started to make this availab...

HermannSW

Yes, the code is now available. Note, you also need to enable burst mode in order to bypass preview (otherwise, you will get 1 preview frame as well as a capture frame). I've edited my comment above and the command line I am using is: raspistill -t 10 -md 3 -bm -ex off -ag 1 -ss 100000000 -st -o lo...

HermannSW

There is also a firmware change, which you need to get via rpi-update, but I am not sure that has been released to rpi-update yet. If you are getting saner times, then perhaps it has. It has not. After rpi-update yesterday and not working, I did "sudo apt-get update" and "sudo apt-get upgrade" toda...

HermannSW

but the official docs also appear to say I can run at 200fps? Are the forks merged into upstream now?/ raspivid is able to capture with 40-200fps since even before it has been documented 2 years ago: https://www.raspberrypi.org/forums/viewtopic.php?f=43&t=206047&p=1430747&hilit=raspivid+200fps#p133...

HermannSW

An example: raspistill -t 10 -md 3 -ex off -ag 1 -ss 100000000 -st -o long_exposure.jpg The firmware changes are slowly trickling through the usual rpi-update channels and will not be available instantly, so please be patient. I did flash Buster on new SD card, and did rpi-update finally. I used yo...

HermannSW

Done - https://github.com/6by9/raspiraw/commit/dbe1acf64cba221787080ad06f79d3a5bccd171a Untested though, particularly on the exposure/gain/flip/vts setup. Just tried raspiraw with HQ camera on 4GB Pi4B, does not work. Here HQ camera is shown (1a): 🍓 ./camera_i2c setting GPIO for board revsion: c031...

HermannSW

are there other boards that support this? Really like this sensor for our commercial use-case. "3. Use RPi High Quality Camera on Jetson Nano" https://www.arducam.com/raspberry-pi-high-quality-hq-camera-imx477/ There is no driver for HQ camera on Jetson Nano currently, but Arducam made it work: HQ_...

HermannSW

You will still need some image processing to rectify the fish-eye like view, E.g. OpenCV Camera calibration with samples/python/calibrate.py demo (HQ camera photo below): https://www.raspberrypi.org/forums/viewtopic.php?f=43&t=272658&p=1663011#p1662752 https://www.raspberrypi.org/forums/download/fi...

HermannSW

Maximal speed measured for raspcatbot was 2.56m/s or 9.21km/h sofar. I found article "3D Printed Train Set Aims For Speed": https://hackaday.com/2020/05/12/3d-printed-train-set-aims-for-speed/ Maximal model train speed was 22.5km/h, slightly above 18km/h raspcatbot target speed. I extracted animated...

HermannSW

I cannot explain why width does not play a role. But for v1 and v2 cameras I determined formulas using raspiraw (HQ tbd): fps_v1(height) ≈ 42755/height+13 fps_v2(height) ≈ 76034/height+67 fps_v2/fps_v1 → 1.78 (>2 for height >= 208) https://www.raspberrypi.org/forums/viewtopic.php?f=43&t=212518&p=131...

HermannSW

Can we capture videos with 2000fps using smaller region of images? such as 320*75 pixels? Definitely not with v1 camera. I have not looked into raspiraw wrt HQ camera yet. And with v2 camera I did always hit 1007fps barrier, regardless how small the frame was. For going above 1007fps some other reg...

HermannSW

The one thing I haven't seen is a program that provides the "onion skin" function that most smartphone stop-motion apps have, where the previous captured frame is overlaid with (for example) 50% transparency on the live view . Is this something anyone has tried before, if it is possible? Things lik...

HermannSW

The 320x240 frames do not look that distorted. I learned that I will have to do camera calibration for being able to project 3D world coordinates to 2D frame coordinates and vice versa. I did that yesterday with HQ camera as warmup, undistored frame created looks impressive for the much distorted ca...

HermannSW

rpi-5.4.y kernel. You'll have /dev/video13 to /dev/video16. 13 is the input, 14 is the high res output, 15 is the low res output, and 16 is the stats output. The format of the stats is as documented in https://github.com/raspberrypi/linux/blob/rpi-5.4.y/Documentation/media/uapi/v4l/pixfmt-meta-bcm2...

HermannSW

Correct, the number isn't delivered back to the app, only scribbled on the images. (Using libcamera and the vc.ril.isp or V4L2 isp component you do get back the raw FOM statistics) Does v4l2-ctl allow to query FoM statistics? If so, how? From /dev/video12? $ dmesg ... [ 4.948458] bcm2835-codec bcm2...

HermannSW

For my raspcatbot 0.3MP monochrome global shutter camera I need to determine mapping of 3D world coordinates to 2D screen coordinates and vice versa: https://www.raspberrypi.org/forums/download/file.php?id=36749 I will use OpenCV calibrateCamera() function for that. The simple use of OpenCV sample p...

HermannSW

I have not done it, but uv4l allows for Jitsi:
https://www.linux-projects.org/uv4l/tut ... itsi-meet/

HermannSW

I tried tightvncserver, and that is not even able to show normal camera preview (HDMI overlay) remotely.
So telepi repo, although last updated in 2014, is still nice to have.

HermannSW

r2k-in-the-vortex wrote: ↑
Sun May 17, 2020 4:03 pm
What I mean by not working with 20ms, is if you do the clock test you'll find the actual capture 1 was only 1s long, even though it took 195s and also wrote that to exif.

You are right, I just verified that.

HermannSW

r2k-in-the-vortex wrote: ↑
Sun May 17, 2020 10:53 am

--shutter has to be over 6s for this to properly work, that however does make initialization and especially disposal slow.

What do you mean with "properly work"?
I used 20ms and did only get 1min additional time.

HermannSW

@r2k-in-the-vortex Your solution is toxic and brilliant ;-) I did sync your repo and built it with "cd userland; time ./buildme dummy" in less than 2 minutes on Pi4B without overwriting system raspistill. Why toxic? I modified my command first and did run it: 🍓 time userland/build/bin/raspistill --m...

HermannSW

All IR lights I tested work with Pi NoIR cameras (I tested with v1 and v2). You can use cheap IR leds like these: https://www.aliexpress.com/item/4001043135917.html A single is enough to iluminte a room, so more than good enough for bird box. You cannot power it from v2 camera, and you should not po...

HermannSW

MMAL contains a feature that allows to display Figure of Merit in order to ease focusing of camera lens. That was recently made available to raspiv̶i̶d̶still ("--focus"/"-fw"). I wanted to use that feature with picamera and was able to do so. The last line in this snippet enables FoM for the camera....

HermannSW

I don't know what changed besides sometimes "sudo apt-get update". I recompiled line.c on the Pi4B, and it just works: 🍓 sudo ./line pi 🍓 sudo ./line raspberry 🍓 P.S: I tried on PI4B+ with latest Buster, and neither the executable from git nor the newly compiled executable work. Seems to be caused b...

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Re: Raw sensor access / CSI-2 receiver peripheral

Re: Raspberry Pi High Quality Camera Long Exposures

Re: Raspberry Pi High Quality Camera Long Exposures

Re: Raspberry Pi High Quality Camera Long Exposures

Re: v2 camera can capture 1000fps videos ...

Re: Raspberry Pi High Quality Camera Long Exposures

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Re: v2 camera can capture 1000fps videos ...

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Re: Raspberry Pi High Quality Camera Long Exposures

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Enhancing picamera with new MMAL features

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