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by HermannSW
Mon Dec 10, 2018 10:52 pm
Forum: Camera board
Topic: Raspiraw - High FPS ~320x240 with full FoV - possible?
Replies: 11
Views: 278

Re: Raspiraw - High FPS ~320x240 with full FoV - possible?

Adding "--width 320 --height 240" to 640x480_B tool gives 640x480_s tool. Because of voinc/hoinc the captured 320x240 image covers same FOV as 640x480 does: https://stamm-wilbrandt.de/en/forum/640x480_s.png Removing voinc/hoinc gives 320x240 tool, that just captures 320x240 frame starting top left i...
by HermannSW
Sun Dec 09, 2018 9:46 pm
Forum: Camera board
Topic: Raspiraw - High FPS ~320x240 with full FoV - possible?
Replies: 11
Views: 278

Re: Raspiraw - High FPS ~320x240 with full FoV - possible?

I got side tracked by creating a millisecond resolution laser clock and taking 1007fps 640x150_s video of that in another thread: https://www.raspberrypi.org/forums/viewtopic.php?f=43&t=228145&p=1401287#p1401745 https://stamm-wilbrandt.de/en/forum/msclk1.anim.gif Now I took 640x480 tool from v2 fold...
by HermannSW
Fri Dec 07, 2018 9:23 pm
Forum: Camera board
Topic: Firing 3-4 cameras at the exact same time
Replies: 7
Views: 258

Re: Firing 3-4 cameras at the exact same time

Neither solution helps with millisecond resolution, even the best monitors have "only" 240Hz. Today I built a millisecond resolution laser clock from 5 laser leds. I used an Arduino Due to drive the clock, will later do with Pi Zero as well. "Millisecond resolution laser clock" https://forum.arduino...
by HermannSW
Fri Dec 07, 2018 5:14 pm
Forum: Camera board
Topic: De-cap Camera v2 / Remove Lenses
Replies: 14
Views: 8035

Re: De-cap Camera v2 / Remove Lenses

I bought 2pcs metal M12 lens mount for less than 2$ with free shipping: https://www.aliexpress.com/item/2PCS-Metal-M12-Lens-Mount-MTV-Security-CCTV-Camera-m12-Lens-Holder-Bracket-Support-Board-Module/32812833842.html They have screw hole distance 22mm, but it was no problem to get screws in inclined...
by HermannSW
Fri Dec 07, 2018 10:51 am
Forum: Camera board
Topic: Weird effects on images from camera on Raspberry Pi 3B+ with a D-Link 4G USB dongle attached to it
Replies: 4
Views: 134

Re: Weird effects on images from camera on Raspberry Pi 3B+ with a D-Link 4G USB dongle attached to it

I agree on the official standpoint wrt short cables, especially EMC. But I have to say that I use a 2m cable and normal cable routinely and have never seen differences. Just now I took a 200fps raspivid recording over 2m cable without issues: $ raspivid -md 7 -w 640 -h 480 -fps 200 -p 100,100,640,48...
by HermannSW
Thu Dec 06, 2018 8:50 pm
Forum: Camera board
Topic: Firing 3-4 cameras at the exact same time
Replies: 7
Views: 258

Re: Firing 3-4 cameras at the exact same time

Framebuffer is 1920x1080 bgr_, visible part is top left 1680x1050 (FLATRON W2242T 60Hz monitor). How to build and use: download td.c sed "s/1024/1920/g" td.c > FHD_clk.c gcc -O6 FHD_clk.c -o FHD_clk switch from X11 to one of the ASCII consoles, eg. CTRL+ALT+F2 sudo ./FHD_clk Better would be to have ...
by HermannSW
Thu Dec 06, 2018 7:28 pm
Forum: Camera board
Topic: Firing 3-4 cameras at the exact same time
Replies: 7
Views: 258

Re: Firing 3-4 cameras at the exact same time

I just compiled td.c from youtube video description link: https://stamm-wilbrandt.de/en/youtube/td.c This time I did run it on RHEL Linux i7 laptop. I cannot see visual updates on top left corner of X11, nor anywhere else on X11. But the clock updates/second are much better (16967): $ sudo ./td 1287...
by HermannSW
Thu Dec 06, 2018 7:07 pm
Forum: Camera board
Topic: Raspiraw - High FPS ~320x240 with full FoV - possible?
Replies: 11
Views: 278

Re: Raspiraw - High FPS ~320x240 with full FoV - possible?

On the train I played a bit with LibreOffice Calc. I assumed that doubling FOV by "4x4 binning" or "hvinc3" (horizontal/vertical increment: 1/1->3/3) are independent. So I created table starting with target resolution on left side (320x240/640x480) and computing the effective FOV with 2x2 binning, e...
by HermannSW
Thu Dec 06, 2018 9:23 am
Forum: Camera board
Topic: Raw Image & pixel-by-pixel RGB information
Replies: 15
Views: 5941

Re: Raw Image & pixel-by-pixel RGB information

..., I have an application that definitely does need the raw, Bayer data, hopefully without stuffing it into the EXIF in a JPEG like the Python picamera module does. I'm hoping to find a way that's faster than the 1-2 FPS I'm getting currently. Seems like it should be possible, but does anyone know...
by HermannSW
Thu Dec 06, 2018 9:05 am
Forum: Camera board
Topic: Raspiraw - High FPS ~320x240 with full FoV - possible?
Replies: 11
Views: 278

Re: Raspiraw - High FPS ~320x240 with full FoV - possible?

Can you tell me the switches you used for the 640x480 almost FOV shown above? No switches, as I said I did image manipulation only with Gimp. I will look into 640x480 double FOV as well as 320x240 tools in the evening when at home. I found the v2 tools (all 640xH) for v2 camera, they are in v2 dire...
by HermannSW
Thu Dec 06, 2018 8:42 am
Forum: General discussion
Topic: Mother-Daughter Pi's?
Replies: 9
Views: 295

Re: Mother-Daughter Pi's?

one idea is to use one Pi 3B+ and four Pi Zero computers. Connect them together using USB with the Zeros running in device mode. Do you mean networking over USB? I was able to setup networking over USB for several PIs using these simple instructions: https://blog.gbaman.info/?p=791 But that worked ...
by HermannSW
Wed Dec 05, 2018 10:15 pm
Forum: Camera board
Topic: Raspiraw - High FPS ~320x240 with full FoV - possible?
Replies: 11
Views: 278

Re: Raspiraw - High FPS ~320x240 with full FoV - possible?

I thought again -- while I cannot make 320x240 FOV bigger than the 640x480 FOV shown in previous posting, I can double the 640x480 FOV for you! I did just capture the 640x480 FOV area from previous v2 camera photo, doubled it in both domensions and inserted again. As you can see with that 640x480 mo...
by HermannSW
Wed Dec 05, 2018 9:49 pm
Forum: Camera board
Topic: Raspiraw - High FPS ~320x240 with full FoV - possible?
Replies: 11
Views: 278

Re: Raspiraw - High FPS ~320x240 with full FoV - possible?

I still have no access to Pi and Pi camera, will be home tomorrow evening. I just found [email protected] tool for v1 camera: https://github.com/Hermann-SW/fork-raspiraw/blob/master/tools/320x240 It has vinc 1F, while 640x480 tool has vinc 17 -- therefore that v1 320x240 tool has full FOV. I just did r...
by HermannSW
Wed Dec 05, 2018 9:21 pm
Forum: General discussion
Topic: Mother-Daughter Pi's?
Replies: 9
Views: 295

Re: Mother-Daughter Pi's?

For my caterpillar robot only sensor is Pi camera and that is handled by daugther Pi, Arduino Due controlling the robot motors is mother. Both are connected by one wire protocol. In MicroPython froum I read that Wifi drops are a real problem, and that ESP32 is affected by that. They stated that soft...
by HermannSW
Wed Dec 05, 2018 8:10 am
Forum: Camera board
Topic: Raspiraw - High FPS ~320x240 with full FoV - possible?
Replies: 11
Views: 278

Re: Raspiraw - High FPS ~320x240 with full FoV - possible?

Which camera version do you have? With 8MP v2 you are lost, there is only two horizontal and two vertical offsets. So you can get FOV(640x480) for 320x240, but not more. 5MP v1 camera (available as 5$ China clone these days only) has full FOV for 640x480 and should allow for 320x240 with full FOV (I...
by HermannSW
Wed Dec 05, 2018 12:10 am
Forum: General discussion
Topic: Cameras Compatible With Raspberry Pi
Replies: 8
Views: 245

Re: Cameras Compatible With Raspberry Pi

We have been looking at industrial cameras and DSLR's since they offer more accuracy than the raspberry pi but we are not sure if they would work with raspberry pi. If they are USB cameras they will work with Pi, but because Pi has only USB 2.0 CSI bus cameras are more performant. There are some ex...
by HermannSW
Tue Dec 04, 2018 11:53 pm
Forum: General discussion
Topic: power supply of Zero W
Replies: 3
Views: 153

Re: power supply of Zero W

Either one should suffice. The power requirements of the Pi0 are far enough below the ratings of both power supplies that you should get the full 5v output. Use the thickest (lowest gauge number) USB cable you get to minimize voltage drop in the cable. Just saw this related posting from today: http...
by HermannSW
Tue Dec 04, 2018 11:48 pm
Forum: General discussion
Topic: My Pi didn’t connect to my WiFi repeater
Replies: 3
Views: 83

Re: My Pi didn’t connect to my WiFi repeater

Removing/commenting out your AP from "/etc/wpa_supplicant/wpa_supplicant.conf" and adding your repeater should fix this.
by HermannSW
Tue Dec 04, 2018 11:44 pm
Forum: Automation, sensing and robotics
Topic: Robotic hand on Arduino do it yourself
Replies: 2
Views: 84

Re: Robotic hand on Arduino do it yourself

"a picture says more than 1000 words" -- don't you have a photo/video?
by HermannSW
Sun Dec 02, 2018 9:26 am
Forum: Camera board
Topic: Firing 3-4 cameras at the exact same time
Replies: 7
Views: 258

Re: Firing 3-4 cameras at the exact same time

For calibration of "exact same time" picture taking you need something that changes very quickly. Even expensive smartphone ms timers cheat in updating display only every 8ms or so (I tested IPhone of a colleague). Some displays are just too slow to display fast. And then software needs some time as...
by HermannSW
Sun Dec 02, 2018 8:57 am
Forum: Camera board
Topic: Spatial drift on NoIR Camera v2
Replies: 15
Views: 516

Re: Spatial drift on NoIR Camera v2

In my raspiraw recordings 1st frame is often not good, sometimes even the first few.
To avoid hunting for a ghost, I would take frame 5 to compare with later frames.
by HermannSW
Thu Nov 29, 2018 5:03 pm
Forum: Raspbian
Topic: Rust does not work after successful install
Replies: 0
Views: 68

Rust does not work after successful install

For building a project I need to install Rust toolchain. I followed the instructions and installation was good: https://rustup.rs/# [email protected]:~ $ curl https://sh.rustup.rs -sSf | sh info: downloading installer ... Rust is installed now. Great! To get started you need Cargo's bin director...
by HermannSW
Thu Nov 29, 2018 7:25 am
Forum: General discussion
Topic: Using hot glue to mount 3B ?
Replies: 7
Views: 298

Re: Using hot glue to mount 3B ?

I do not like supper glue - it lack "cushioning" , and requires flat non porous surface. I never glued a Pi somewhere, but in general I superglue nearly everything. I had to be careful in supergluing (Lego or other) wheels directly on motor shaft. Once I lost a motor due to superglue getting inside...
by HermannSW
Wed Nov 28, 2018 4:26 pm
Forum: Automation, sensing and robotics
Topic: controlling a wifi drone using pi 3 B+
Replies: 2
Views: 161

Re: controlling a wifi drone using pi 3 B+

I started such a project for a specific drone some time ago (Eachine E52): https://github.com/Hermann-SW/wireless-control-Eachine-E52-drone To control the drone I needed to reverse engineer the Wifi traffic. Under that link you will find how I did that using Ettercap. Until now I am able to receive ...
by HermannSW
Sat Nov 24, 2018 9:12 pm
Forum: Camera board
Topic: Cheap RC airplane with "outboard" Pi Zero and camera
Replies: 44
Views: 11615

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

... So here after 3 frames the "same" scene appears again. I wanted to be sure and used 640x150_s tool that records every other line/column only and therefore captures with 1007fps as well. Because of the different "capturing position/time after framestart" pair this video is much better to see tha...

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