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by HermannSW
Mon Jul 16, 2018 8:21 pm
Forum: Camera board
Topic: Cheap RC airplane with "outboard" Pi Zero and camera
Replies: 33
Views: 7319

Re: Cheap RC airplane with "outboard" Pi Zero and camera

As said in last posting P.P.P.S there is No-flight time until ordered blades will have arrived. I did connect my Android to the E52 on weekend and found drone AP IP address to be 172.16.10.1. I did "nmap 172.16.10.1" and found port 8888 open. Today I googled for "eachine 172.16.10.1" and found this ...
by HermannSW
Mon Jul 16, 2018 10:25 am
Forum: Official Foundation Display
Topic: Comparison with 7" Non-touch Waveshare LCD
Replies: 1
Views: 49

Comparison with 7" Non-touch Waveshare LCD

I did buy 7" Waveshare LCD for two reasons: I don't want to touch the display because I have touch on wireless keyboard only 60% of price compared to official foundation display (in Germany) All works fine with Waveshare 7" for me, even raspivid preview window and taking screenshots, both in console...
by HermannSW
Sat Jul 14, 2018 9:32 am
Forum: Camera board
Topic: Cheap RC airplane with "outboard" Pi Zero and camera
Replies: 33
Views: 7319

Re: Cheap RC airplane with "outboard" Pi Zero and camera

I did some more small space flights in MTS and drone blades nearly killed the border Raspberry v1 camera cable (I lost a 1m v2 camera cable by an uncontrolled indoor drone flight before). So I taped and secured both camera cables in MTS flat to the borders: https://stamm-wilbrandt.de/en/forum/IMG_12...
by HermannSW
Thu Jul 12, 2018 6:55 pm
Forum: Camera board
Topic: Cheap RC airplane with "outboard" Pi Zero and camera
Replies: 33
Views: 7319

Re: Cheap RC airplane with "outboard" Pi Zero and camera

I did this experiment as 2nd backup plan in case I cannot fix E52 drone camera. I wanted to test whether Pi ZeroW+v1 camera+cable can replace E52 FPV camera board. As easy test I just added it without removing existing FPV camera and board: https://stamm-wilbrandt.de/en/forum/IMG_120718_201538.jpg 8...
by HermannSW
Thu Jul 12, 2018 7:44 am
Forum: Camera board
Topic: Camera, Video Past 10seconds?
Replies: 5
Views: 208

Re: Camera, Video Past 10seconds?

See raspivid documentation:
https://www.raspberrypi.org/documentati ... /camera.md

Search for "-k" 6by9 used, that is for "Enter keypress".

Search for "--signal" (just below "-k") for toggling with signal.
The provided example looks simple:

Code: Select all

kill -USR1 <process id of raspivid>
by HermannSW
Thu Jul 12, 2018 7:27 am
Forum: Camera board
Topic: Cheap RC airplane with "outboard" Pi Zero and camera
Replies: 33
Views: 7319

Re: Cheap RC airplane with "outboard" Pi Zero and camera

I had problems in uploading Eachine E52 .mp4 videos to youtube, youtube refused to take them. Although .mp4 is a supported video format, youtube complained that I should use a supported format?!?!? Yesterday I found the reason (there is an audio channel in E52 .mp4 videos) that does confuse youtube....
by HermannSW
Wed Jul 11, 2018 9:11 am
Forum: Camera board
Topic: Cheap RC airplane with "outboard" Pi Zero and camera
Replies: 33
Views: 7319

Re: Cheap RC airplane with "outboard" Pi Zero and camera

Two days ago I did more excercise flights, with now 6 lipos much more flight time. I lost E52 drone two times in distant high grass, found it via drone AP Wifi signal strength shown in Android smartphone, details: https://forum.arduino.cc/index.php?topic=554543.msg3800878#msg3800878 Yesterday I lost...
by HermannSW
Thu Jul 05, 2018 9:38 am
Forum: Automation, sensing and robotics
Topic: Measuring the distance of a painted path with pi camera
Replies: 16
Views: 366

Re: Measuring the distance of a painted path with pi camera

If you want to measure via an image, you will have to calibrate the camera first (either manually or automatically), see below. For calibrated camera you can determine which row corresponds to which distance: https://stamm-wilbrandt.de/en/forum/calibration.bright.pgm.png You will have to do same for...
by HermannSW
Wed Jul 04, 2018 5:42 pm
Forum: General discussion
Topic: Want to server a webpage locally only PiZeroW
Replies: 13
Views: 272

Re: Want to server a webpage locally only PiZeroW

I find it much easier to make the Android smartphone the access point. In addition all my PIs can connect to my routers at main and secondary living place, and to a ESP32 module being AP. I just append these lines to /etc/wpa_supplicant/wpa_supplicant.conf, directly after flashing a new SD card, bef...
by HermannSW
Wed Jul 04, 2018 2:19 pm
Forum: Automation, sensing and robotics
Topic: super accurate distance measurement with rPi
Replies: 3
Views: 193

Re: super accurate distance measurement with rPi

ash73 wrote:
Wed Jul 04, 2018 1:20 pm
Has anyone managed to hook one of these up to a rPi?
Pimoroni has:
https://pypi.org/project/VL53L1X/0.0.1/
by HermannSW
Wed Jul 04, 2018 12:34 am
Forum: Beginners
Topic: waveshare 7" touchscreen
Replies: 4
Views: 764

Re: waveshare 7" touchscreen

I have a Waveshare 7" display without touch intentionally, since I have touchpad on the wireless keyboard I use with that display. Until now I always used Stretch Lite. Today I flashed Raspbian Stretch Desktop and the keyboard touchpad worked like a charme: https://stamm-wilbrandt.de/en/forum/IMG_04...
by HermannSW
Tue Jul 03, 2018 7:21 pm
Forum: Camera board
Topic: Is 5000lm+5000lm leds = 10000lm with this 50W driver?
Replies: 13
Views: 813

Re: Is 5000lm+5000lm leds = 10000lm with this 50W driver?

I did order a 100W led driver and received it recently, in order to test with 5000/10000/15000 lm: https://stamm-wilbrandt.de/en/forum/IMG_230618_140524.jpg Today I build test environment, v2 camera capturing scene for 30 seconds with -set option, 100W led driver connected to two 5000lm LEDs in para...
by HermannSW
Tue Jul 03, 2018 5:48 pm
Forum: Camera board
Topic: v2 camera raspivid now captures up to 200fps ...
Replies: 6
Views: 1237

Re: v2 camera raspivid now captures up to 200fps ...

I did a first pull request against Raspberry documentation wrt 200fps maximal framerate for v2 camera mode 7: https://github.com/raspberrypi/documentation/pull/908 Today it got merged after being enhanced. I don't fully understand the footnote since I was able to capture with 180fps without "--ex of...
by HermannSW
Mon Jul 02, 2018 9:43 pm
Forum: Camera board
Topic: minimum focus distance possible
Replies: 5
Views: 203

Re: minimum focus distance possible

According to your infos the closest distance with pi camera I can get is about 80 mm Wrong, I did sharp images with 15mm between lense and object (0.40μm/pixel): https://www.raspberrypi.org/forums/viewtopic.php?f=43&t=210605&start=25#p1308543 https://stamm-wilbrandt.de/en/forum/20%C2%B0.4ext.b.jpg
by HermannSW
Mon Jul 02, 2018 12:43 pm
Forum: Camera board
Topic: minimum focus distance possible
Replies: 5
Views: 203

Re: minimum focus distance possible

emetss wrote:
Sun Jul 01, 2018 5:15 pm
I need it to take pictures with high resolution.
You can get 1µm/pixel easily, and even 0.12µm/pixel with a little more effort for v2 camera 8MP image:
viewtopic.php?f=43&t=210605&start=25#p1306901
by HermannSW
Fri Jun 29, 2018 7:55 pm
Forum: Camera board
Topic: Is raspivid preview window expected to work with raspivid stopped?
Replies: 1
Views: 101

Is raspivid preview window expected to work with raspivid stopped?

I did run this command and saw preview window on 7" LCD screen: raspivid -md 7 -w 640 -h 480 -p 350,10,640,480 -fps 90 -t 0 Then I did press CTRL-Z and stopped raspivid. The preview window kept showing whatever changes in front of the camera. How does preview window work (show camera preview) if ras...
by HermannSW
Wed Jun 27, 2018 7:13 pm
Forum: Camera board
Topic: raspi2png captures screenshot inclusive raspivid preview
Replies: 0
Views: 84

raspi2png captures screenshot inclusive raspivid preview

Today I learned about GPU accelerated console image viewer "omxiv", until now I used "fbi". And in discussion I learned on "raspi2png" for capturing screenshots. https://www.raspberrypi.org/forums/viewtopic.php?f=66&t=17033&p=1333762#p1333762 Until today I always used "fbgrab" for taking console scr...
by HermannSW
Wed Jun 27, 2018 6:23 pm
Forum: Raspbian
Topic: Command line Image viewer?
Replies: 67
Views: 136749

Re: Command line Image viewer?

Thank you so much, I cloned the repo, did build it and it worked with my new 7" LCD as well ! I first wanted to report that fbgrab does not work with dpi24 either, but now even with my new 7" LCD display ... https://stamm-wilbrandt.de/en/forum/IMG_270618_200311.jpg ... taking snapshot with overlay w...
by HermannSW
Wed Jun 27, 2018 3:27 pm
Forum: Camera board
Topic: Cheap RC airplane with "outboard" Pi Zero and camera
Replies: 33
Views: 7319

Re: Cheap RC airplane with "outboard" Pi Zero and camera

I made many more search flights with drone, found airplane on three videos. Today I copied out the parts of those videos that showed the airplane, did crop top left 700x360 from 1280x720 frames, slowed down framerate of 30 fps to 6 fps, concatenated the videos (all with ffmpeg) and converted to anim...
by HermannSW
Wed Jun 27, 2018 12:21 pm
Forum: Raspbian
Topic: Command line Image viewer?
Replies: 67
Views: 136749

Re: Command line Image viewer?

I am really impressed, only png lib needed to be installed, all build instructions worked like a charme. I first did run omxiv with animated .gif from command line, supports animated .gif. Then I did ssh into the Pi and executed from there -- it displayed on HDMI monitor as well, no virtual console ...
by HermannSW
Thu Jun 21, 2018 7:30 pm
Forum: Camera board
Topic: Long exposure with raspiraw
Replies: 12
Views: 549

Re: Long exposure with raspiraw

May I ask you how did you get those times per lines? I imagine it depends on the pixel clock, the PLL setting (which doesn't work below 0x50 in my setup) and the HTS. 6by9 is bound by NDAs, so he cannot tell you anything that is not publically available somewhere. You get those line time by formula...
by HermannSW
Thu Jun 21, 2018 6:53 pm
Forum: Camera board
Topic: Cheap RC airplane with "outboard" Pi Zero and camera
Replies: 33
Views: 7319

Re: Cheap RC airplane with "outboard" Pi Zero and camera

What I thought to be the plane was a red hering. Good news: I found the plane, and it was really one of the three trees I identified acoustically. Bad news: The plane landed at least 20m above ground, and in the only conifer amoung those three trees. How did I find? I did not want to repeat last sea...
by HermannSW
Wed Jun 20, 2018 7:56 pm
Forum: Camera board
Topic: Best approach to HDR photos with camera v2 module (imx219)
Replies: 12
Views: 555

Re: Best approach to HDR photos with camera v2 module (imx219)

Hi ethanol100, very impressive what you did, and that you showed a method using -ss instead of -ev. I replicated what you did, can you please take the 5 images and show what luminance hdr makes of it? https://stamm-wilbrandt.de/en/forum/hdr/01.jpg https://stamm-wilbrandt.de/en/forum/hdr/02.jpg https...
by HermannSW
Wed Jun 20, 2018 12:37 pm
Forum: Camera board
Topic: PiNoIR v2 mode 4 1640x1232 fast capture with python+opencv
Replies: 17
Views: 694

Re: PiNoIR v2 mode 4 1640x1232 fast capture with python+opencv

... but only if I can get the acquired frames without every second frame being a dud ... The 2nd frames are no duds but carry other information and have same timestamp as those carrying the data you want. You can lookup raspiraw.c in code accessding SD card on how to filter the frames you are inter...
by HermannSW
Tue Jun 19, 2018 6:56 pm
Forum: Camera board
Topic: raspistill filename taking pictures pressing a button
Replies: 4
Views: 182

Re: raspistill filename taking pictures pressing a button

Do I have to write the os.system() this way: os.system(for i in range(1, 9): print 'sudo raspistill -q 100 -ev 2 -n -t 300 -o imm{:04d}.jpg'.format(i)) No, you have to store the formatted string in a variable (str) and then do os.system(str). I prepended "echo" command to see what goes on: >>> impo...

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