Go to advanced search

by HermannSW
Tue Sep 03, 2019 5:50 pm
Forum: Camera board
Topic: Missing colors
Replies: 3
Views: 163

Re: Missing colors

Or if you're using a NoIR camera in daylight, then that is to be expected. Really? I don't see pink on 90fps NoIR v1 camera frame (robot through sunny grass): https://forum.arduino.cc/index.php?topic=462107.msg3268945#msg3268945 https://stamm-wilbrandt.de/en/forum/downhill_grassy_hiking_trail.jpg S...
by HermannSW
Tue Sep 03, 2019 5:27 pm
Forum: C/C++
Topic: pigpio C sub µs single pulse generation
Replies: 48
Views: 4203

Re: pigpio C sub µs single pulse generation

Just a short update, audio_shots.c just works, no changes needed; and it enables to find the correct offset needed: (five 9µs long flashes at 6KHz, 2000µs after microphone sensor trigger, 36m/s airsoft pistol 6mm diameter pellet) $ sudo ./audio_shots 5 9 6000 2000 https://stamm-wilbrandt.de/en/forum...
by HermannSW
Tue Sep 03, 2019 5:06 pm
Forum: Camera board
Topic: Raspberry v1 camera global (external) shutter videos
Replies: 43
Views: 5406

Re: Raspberry v1 camera global (external) shutter videos

I made progress, in determining the offset needed. Unlike yesterday where I used a v1 camera with manually added M12 lens mount and lens, I used this time the last v1 camera clone I received as is. I reduced N to 50 shots, and doubled frequency to 6000Hz, and captured frames like this: https://stamm...
by HermannSW
Tue Sep 03, 2019 3:00 pm
Forum: Camera board
Topic: Missing colors
Replies: 3
Views: 163

Re: Missing colors

If your camera is a NoIR camera, then read this top pinned thread:
https://www.raspberrypi.org/forums/view ... 3&t=245994
by HermannSW
Tue Sep 03, 2019 7:41 am
Forum: Camera board
Topic: Arducam boards not working
Replies: 9
Views: 490

Re: Arducam boards not working

On the 8MP motorized focus camera, that should behave like normal Raspberry v2 camera. If you connect it, then start the Pi, what does "vcgencmd get_camera" say? The 13/16/18MP color rolling shutter Arducam cameras, as well as the 0.3/1.0/2.0MP monochrome global shutter cameras run only with the Ard...
by HermannSW
Mon Sep 02, 2019 11:35 pm
Forum: C/C++
Topic: pigpio C sub µs single pulse generation
Replies: 48
Views: 4203

Re: pigpio C sub µs single pulse generation

Could you have a sensor that triggers the strobe after a programmable time? I'm thinking milk drops etc's Vela Pop (38£) sound trigger allows to configure delays between 0 and 1000 microseconds: http://www.vela.io/vela-pop-high-speed-sound-trigger ... No need for that, I just used <1$ microphone se...
by HermannSW
Mon Sep 02, 2019 9:42 pm
Forum: Camera board
Topic: Raspberry v1 camera global (external) shutter videos
Replies: 43
Views: 5406

Re: Raspberry v1 camera global (external) shutter videos

This posting is on work in progress, reporting on initial success with microphone sensor triggered global external shutter captures. Yesterday I found a microphone sensor I bought 4 years ago in my http://aliexpress.com order list, after some search I found it in real as well. I tested that it works...
by HermannSW
Mon Sep 02, 2019 11:13 am
Forum: Camera board
Topic: Streaming mjpg from Raspberry Cam
Replies: 221
Views: 182940

Re: Streaming mjpg from Raspberry Cam

ntn wrote:
Sat Aug 31, 2019 10:07 pm
Basically during night I get big amount of "ping noise" from every cam I have,
I assume you mean pink, and because of night I assume you have NoIR cameras.

Please read pinned thread "New AWB algorithm - NoIR camera support":
https://www.raspberrypi.org/forums/view ... 3&t=245994
by HermannSW
Mon Sep 02, 2019 9:13 am
Forum: General discussion
Topic: trouble install 7inch HDMI display-b in raspberry Pi 3B+
Replies: 1
Views: 90

Re: trouble install 7inch HDMI display-b in raspberry Pi 3B+

I have modified the config.txt file and also downloaded the driver with the files. You seem to have this Waveshare display: https://www.waveshare.com/wiki/7inch_HDMI_LCD_(B) If clicking more you come to: https://www.waveshare.com/7inch-HDMI-LCD-B.htm And there it states: When works with Raspberry P...
by HermannSW
Sun Sep 01, 2019 8:44 pm
Forum: General discussion
Topic: pics - how are you using your Pi?
Replies: 18
Views: 1079

Re: pics - how are you using your Pi?

Some MIT students used global external shutter capturing with Raspberry v1 camera to capture rifle bullet just after passing through an apple. That was done numerous times before. What they made special is that they did capture the global shutter image with 16(!) PIs with cameras at the same point i...
by HermannSW
Sat Aug 31, 2019 9:08 pm
Forum: Camera board
Topic: Arducam cameras fitting Raspberry CSI-2 interface
Replies: 7
Views: 999

Re: Arducam cameras fitting Raspberry CSI-2 interface

..., I asked Lee for soldering instructions in order to make the two ov9281 modules work with stero hat. I just received the instructions (removing oscillator and crypto chip from one module, solder two jumping wires for GND (redundant) and oscillator clock between the two modules). When back at ho...
by HermannSW
Sat Aug 31, 2019 12:47 pm
Forum: Camera board
Topic: Creating a RPI-assisted microscope
Replies: 53
Views: 9493

Re: Creating a RPI-assisted microscope

It's an open-source, Raspberry-Pi based microscope, with several different optics modules and even an automated translation stage to move the sample and focus. On the project page it is stated that moving the object and focus can be done with sub-micron (<1µm) precision. That sounds helpful, it mea...
by HermannSW
Sat Aug 31, 2019 12:28 pm
Forum: Camera board
Topic: Pi camera as machine vision camera
Replies: 2
Views: 204

Re: Pi camera as machine vision camera

Have you tried "-awb off -ex off"?
"off" is mentioned for "-awb", but not for "-ex" -- but 6by9 several times proposed "-ex off" in the past:
https://www.raspberrypi.org/documentati ... /camera.md
by HermannSW
Fri Aug 30, 2019 8:45 pm
Forum: Troubleshooting
Topic: [Buster] USB camera, Internal data stream error
Replies: 3
Views: 229

Re: [Buster] USB camera cannot get freq at ep 0x84

> When upgrading from stretch to buster image
>
Did you start from a scratch installed Buster, or did you dist-upgrade somehow?
I read somewhere that Buster should be/needs to be installed from scratch ...
by HermannSW
Fri Aug 30, 2019 5:33 pm
Forum: Camera board
Topic: STICKY: Foundation (old) Camera Board information
Replies: 446
Views: 291667

Re: STICKY: Foundation (old) Camera Board information

Always worth noting that if you buy non-Pi cameras, we make no money from them, and that means less cash for future products/Foundation work. But it's certainly your choice. Agreed, but I bought two v2 cameras and a 4B, a 3B+, a 3A+, a 3B, a 2B+, 3xZeroW (and 5 Zeros you seem to make no money with)...
by HermannSW
Fri Aug 30, 2019 2:21 pm
Forum: Camera board
Topic: STICKY: Foundation (old) Camera Board information
Replies: 446
Views: 291667

Re: STICKY: Foundation (old) Camera Board information

"... (old) ..." has been added to the subject. What I seem worth mentioning are some facts that still hold in 2019 for v1 camera (clone). Availability: even 4 years after v2 camera became available v1 camera can be bought at many sellers v1 camera clones are really cheap, less than 4$ with free ship...
by HermannSW
Fri Aug 30, 2019 10:13 am
Forum: General discussion
Topic: Not smooth video record using unofficial Pi Camera module
Replies: 7
Views: 395

Re: Not smooth video record using unofficial Pi Camera module

1.) Why use python at all? @6by9 did provide a complete solution.
2.) If using python, use bashcommand for raspivid statement as well and skip using picamera
by HermannSW
Thu Aug 29, 2019 7:36 pm
Forum: General discussion
Topic: pics - how are you using your Pi?
Replies: 18
Views: 1079

Re: pics - how are you using your Pi?

Cheap RC airplane with "outboard" Pi Zero and camera: https://www.raspberrypi.org/forums/viewtopic.php?t=190407 https://stamm-wilbrandt.de/en/forum/IMG_20170807_174748.jpg The little white dot is me ;-) https://www.youtube.com/watch?v=bo0iMjMv46w https://stamm-wilbrandt.de/en/forum/PiZeroCameraVeryH...
by HermannSW
Thu Aug 29, 2019 7:31 pm
Forum: General discussion
Topic: pics - how are you using your Pi?
Replies: 18
Views: 1079

Re: pics - how are you using your Pi?

As Raspberry "Pyro", ignites an electric match and record 665fps highspeed video of that (played at 25fps, 26.6 times slower than real):
https://www.raspberrypi.org/forums/view ... p?t=204444
Image
by HermannSW
Thu Aug 29, 2019 7:21 pm
Forum: General discussion
Topic: pics - how are you using your Pi?
Replies: 18
Views: 1079

Re: pics - how are you using your Pi?

Using Pi to capture global external shutter videos with Raspberry v1 camera. The Pi records the video of airgun pellet in flight, as well as triggers the diy highspeed flash with 3kHz/9kHz PWM of 8.33µs duration flashes. Pi is hidden by the pehllet catcher, on the right side of the photo. https://gi...
by HermannSW
Thu Aug 29, 2019 3:25 pm
Forum: Camera board
Topic: Raw sensor access / CSI-2 receiver peripheral
Replies: 531
Views: 159643

Re: Raw sensor access / CSI-2 receiver peripheral

Pi4B raspiraw from this branch showed problems: https://github.com/6by9/raspiraw So I used this repo for testing how long high framerate video becomes possible with Pi4B 2GB /dev/shm filesystem: https://github.com/Hermann-SW/fork-raspiraw The frame drops are higher on Pi4B than on the other PIs, I h...
by HermannSW
Thu Aug 29, 2019 11:48 am
Forum: Troubleshooting
Topic: PI 4 - can't change desktop resolution VGA
Replies: 9
Views: 1675

Re: PI 4 - can't change desktop resolution VGA

At my secondary living place I have a different HDMI monitor with [email protected]. I changed /boot/config.txt to ... hdmi_group=2 #hdmi_mode=39 hdmi_mode=58 ... and [email protected]:~ $ cat ~/.xsessionrc #xrandr --output HDMI-1 --mode 1360x768 xrandr --output HDMI-1 --mode 1680x1050 [email protected]:...
by HermannSW
Wed Aug 28, 2019 3:50 pm
Forum: Camera board
Topic: Arducam cameras fitting Raspberry CSI-2 interface
Replies: 7
Views: 999

Re: Arducam cameras fitting Raspberry CSI-2 interface

The blog posting I mentioned has been done on Arducam site. You can find much more details in it: https://www.arducam.com/dual-camera-hat-synchronize-stereo-pi-raspberry/ I was surprised by a new use case, makes sense: "Panoramic (3D) photos and videos" (with fisheye lenses) https://stamm-wilbrandt....
by HermannSW
Wed Aug 28, 2019 10:49 am
Forum: General discussion
Topic: Streaming camera to YouTube
Replies: 1
Views: 97

Re: Streaming camera to YouTube

See this blog posting, you just need a youtube rtmp: target after "-f flv":
https://www.digikey.com/en/maker/blogs/ ... -pi-camera

Go to advanced search