Go to advanced search

by HermannSW
Fri Aug 23, 2019 3:47 pm
Forum: Camera board
Topic: Arducam cameras fitting Raspberry CSI-2 interface
Replies: 1
Views: 141

Re: Arducam cameras fitting Raspberry CSI-2 interface

Now I tested the bigger sample I got, and it is quite impressive. The rule until today was: If you want to connect two cameras to a Pi, you need Compute module This is not true anymore, Arducam Stereo camera hat allows to connect two cameras to any Raspberry Pi. I got this sample so early that Lee d...
by HermannSW
Fri Aug 23, 2019 11:17 am
Forum: Raspbian
Topic: 1366x768 HDMI TV starts 1824x984 console?!?!
Replies: 4
Views: 862

Re: 1366x768 HDMI TV starts 1824x984 console?!?!

With Pi4B the above settings work only when connecting to the left Pi4B HDMI connector: https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=245720&p=1524135#p1524135 For X11 to work with Pi4B with 1360x768 HDMI monitor, xrandr has to be used in addition: https://www.raspberrypi.org/forums/viewto...
by HermannSW
Fri Aug 23, 2019 9:35 am
Forum: Troubleshooting
Topic: PI 4 - can't change desktop resolution VGA
Replies: 9
Views: 468

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

I found the solution to get console mode correct as well. The .xsessionrc file as described is still needed for X11. I tested all 4 boot options, console/X11 with and without login, all is fine now! I changed cameras connected to Pi4B CSI-2 connector several times and realized that it is not that ea...
by HermannSW
Fri Aug 23, 2019 7:05 am
Forum: Camera board
Topic: Raw sensor access / CSI-2 receiver peripheral
Replies: 530
Views: 146355

Re: Raw sensor access / CSI-2 receiver peripheral

Sorry, my fault, I only enabled I2C in raspi-config and missed to add "dtparam=i2c_vc=on" to "/boot/config.txt". Now raspiraw works, but I get two super huge frame skips when running 640x128 tool, investigating: pi@raspberrypi4B:~/raspiraw/c $ 640x128 2000 removing /dev/shm/out.*.raw capturing frame...
by HermannSW
Thu Aug 22, 2019 11:29 pm
Forum: Camera board
Topic: Raw sensor access / CSI-2 receiver peripheral
Replies: 530
Views: 146355

Re: Raw sensor access / CSI-2 receiver peripheral

@6by9 I want to play with my new 4GB Pi4B and raspiraw. v2 camera works with raspivid on Pi4B. I did clone latest raspiraw from your repo, because that knows about Pi4B. But camera shows up as /dev/i2c-1 and not /dev/i2c-0. I did change camera_i2c last line in 4B section to "i2cdetect -y 1" because ...
by HermannSW
Thu Aug 22, 2019 6:03 pm
Forum: Troubleshooting
Topic: PI 4 - can't change desktop resolution VGA
Replies: 9
Views: 468

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

If you add this to X autostart script, it should set your needed graphics mde in X Which X autostart file? I have placed it in ~/.xsessionrc and it switches to correct resolution after I logged in -- I can live with login screen not running at correct resolution (it runs 1920x1080): pi@raspberrypi4...
by HermannSW
Thu Aug 22, 2019 4:52 am
Forum: Camera board
Topic: V2 Sony imx219 specifications?
Replies: 3
Views: 113

Re: V2 Sony imx219 specifications?

mkirk wrote:
Wed Aug 21, 2019 10:24 pm
Are they available someplace else?
https://github.com/rellimmot/Sony-IMX21 ... et_XXX.PDF
by HermannSW
Wed Aug 21, 2019 8:16 pm
Forum: Camera board
Topic: Arducam cameras fitting Raspberry CSI-2 interface
Replies: 1
Views: 141

Arducam cameras fitting Raspberry CSI-2 interface

I do own 7 v1 cameras, as well as two v2. I did buy some Arducam cameras as well, eg. ArduCam OV5647 Camera Board w/ M12 Mount, which I used for starting global external shutter captures before I learned to make Arduino v1 camera (clone) doing so as well: https://www.raspberrypi.org/forums/viewtopic...
by HermannSW
Tue Aug 20, 2019 9:20 pm
Forum: Camera board
Topic: using raspistill to only display red pixels in Real Time
Replies: 20
Views: 1202

Re: using raspistill to only display red pixels in Real Time

The only concern is that there is too much latency (delay) in the image itself. Is that expected or does the 'redfilter' need more tuning? Thank you so much to have brought this up. I created redfilter sofar on the YUV input requirement from original poster. But as we have seen doing redfilter for ...
by HermannSW
Tue Aug 20, 2019 5:53 pm
Forum: Camera board
Topic: Question on yuv I420 to grey conversion
Replies: 4
Views: 441

Re: Question on yuv I420 to grey conversion

Looked into "Raspberry Pi Camera Module" documentation yesterday: https://www.raspberrypi.org/documentation/raspbian/applications/camera.md If interested only in the Y channel of YUV image, then why transmit U and V at all? This can be achieved by "raspividyuv" option "--luma / -y". And by "raspivid...
by HermannSW
Tue Aug 20, 2019 2:29 am
Forum: Camera board
Topic: using raspistill to only display red pixels in Real Time
Replies: 20
Views: 1202

Re: using raspistill to only display red pixels in Real Time

The only concern is that there is too much latency (delay) in the image itself. Is that expected or does the 'redfilter' need more tuning? Hi, regardless whether you do redfilter in gstreamer plugin or OpenCV, the amount of pixel work is big. In this posting I explained the per pixel code in detail...
by HermannSW
Mon Aug 19, 2019 8:07 pm
Forum: Camera board
Topic: Video from V2 with full sensor resoution
Replies: 3
Views: 441

Re: Video from V2 with full sensor resoution

I got the following lower resolution to work and produce a h264 output (which I can convert to MP4 through MP4Box): raspivid -md 4 -w 1640 -h 1232 -t 10000 -o Vid1.h264 If I use -md 2 -w 1640 -h 1232 -t 10000 -o Vid1.h264 I get a brighter video. Why is this? The difference is that you capture a 328...
by HermannSW
Sat Aug 17, 2019 12:02 am
Forum: Camera board
Topic: Video from V2 with full sensor resoution
Replies: 3
Views: 441

Re: Video from V2 with full sensor resoution

With v2 camera you have two resolutions with full FoV, image from: https://picamera.readthedocs.io/en/release-1.12/fov.html You have to specify raspivid mode as well as -w and -h to get full FoV: raspivid -md 2 -w 3280 -h 2464 -t 0 raspivid -md 4 -w 1640 -h 1232 -t 0 https://picamera.readthedocs.io/...
by HermannSW
Fri Aug 16, 2019 10:02 pm
Forum: Camera board
Topic: Switching Between two Camera video feeds
Replies: 1
Views: 295

Re: Switching Between two Camera video feeds

Only compute module has two camera connectors, so in case you want to use two Raspberry (v1 or v2) cameras, you need a compute module.
With the other Pi models you can have two cameras wih Raspberry camera and USB cameras, but at most one Raspberry camera.
by HermannSW
Fri Aug 16, 2019 12:38 pm
Forum: Camera board
Topic: Raw sensor access / CSI-2 receiver peripheral
Replies: 530
Views: 146355

Re: Raw sensor access / CSI-2 receiver peripheral

Found this tweet from @MachinePix: Removing unripe tomatoes with an optical sorter. https://twitter.com/MachinePix/status/938538155057209344 Not sure what optical sensors are used, nor have any information on the framerate in case it is a/are camera(s). This is just small clip from slow motion part ...
by HermannSW
Thu Aug 15, 2019 9:04 pm
Forum: Camera board
Topic: Waveshare 170° fisheye Raspberry Pi Camera (I)
Replies: 2
Views: 255

Re: Waveshare 170° fisheye Raspberry Pi Camera (I)

RPF does not sell v1 cameras since 2016. In general you have to ask Waveshare support if you have questions with their camera. But your camera looks like any other Pi camera with M12 lens mount. Just turn the lens left/right to move it out/in -- that will adjust focus. I do that typically while runn...
by HermannSW
Thu Aug 15, 2019 3:11 pm
Forum: Camera board
Topic: using raspistill to only display red pixels in Real Time
Replies: 20
Views: 1202

Re: using raspistill to only display red pixels in Real Time

I used "... ! redfilter ! fakesink" in below posting to determine what framerate can be achieved by redfilter without videoconvert and output to fbdevsink: https://www.raspberrypi.org/forums/viewtopic.php?f=43&t=109137&p=1519206#p1519206 There was a problem, the (gstreamer reported) timestamps showe...
by HermannSW
Thu Aug 15, 2019 3:03 pm
Forum: Camera board
Topic: How to read picamera hardware information that which type of camera sensor(imx219 or OV5647) is being used in camera mod
Replies: 8
Views: 445

Re: How to read picamera hardware information that which type of camera sensor(imx219 or OV5647) is being used in camera

Store camver script from the pointed to posting and execute, it will output the camera version.
It does so by querying i2cdetect output, v1 camera runs on 0x36, v2 camera on 0x10.
by HermannSW
Wed Aug 14, 2019 8:12 pm
Forum: Camera board
Topic: Raw sensor access / CSI-2 receiver peripheral
Replies: 530
Views: 146355

Re: Raw sensor access / CSI-2 receiver peripheral

There are two fundamental approaches (maybe more): 1. Sequential: Capture Frame > Process > Capture Frame > ... 2. Parallel (I believe what you mention), requires multiple threads? : Capture Frame > Process > Capture Frame.... ...... Process > Capture Frame > Process .... Just raspividyuv capturing...
by HermannSW
Wed Aug 14, 2019 3:10 pm
Forum: Camera board
Topic: using raspistill to only display red pixels in Real Time
Replies: 20
Views: 1202

Re: using raspistill to only display red pixels in Real Time

Recently I determined the times for capturing a 640x480 frame for both Raspberry cameras with the help of hardware camera sync pulses: https://www.raspberrypi.org/forums/viewtopic.php?f=43&t=190314&p=1516097#p1516097 Capturing a frame takes 4.7ms for v2 camera, and 10.21ms for v1 camera. Today I wan...
by HermannSW
Wed Aug 14, 2019 1:17 pm
Forum: Camera board
Topic: v2.1 camera module, FSTROBE signal and pinnings
Replies: 3
Views: 466

Re: v2.1 camera module, FSTROBE signal and pinnings

I cannot help with the v2 camera. But there is a more expensive (20$) version of ov5647 module (v1 camera) for Raspberry (you can get v1 clones for 3$ these days). That module exposes FREX (that was interesting to me) pin as well as STROBE: https://www.raspberrypi.org/forums/viewtopic.php?f=43&t=235...
by HermannSW
Tue Aug 13, 2019 9:02 am
Forum: Camera board
Topic: Raw sensor access / CSI-2 receiver peripheral
Replies: 530
Views: 146355

Re: Raw sensor access / CSI-2 receiver peripheral

Great work! Is it possible to acquire or read the frames into a numpy array using these aforementioned methods? I doubt that numpy is fast enough to do any meaningful work in the low time available (640x75@1007fps or 640x64@665fps leaves you 1ms/1.5ms of processing per frame only). But writing fram...
by HermannSW
Tue Aug 13, 2019 8:29 am
Forum: Camera board
Topic: Cheap RC airplane with "outboard" Pi Zero and camera
Replies: 45
Views: 20594

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

Interestingly Stratolaunch seems to follow a similar concept, they have the worlds widest airplane (117m) now: https://spacenews.com/wp-content/uploads/2017/05/stratolaunch-rollout.jpg People have stretched this concept to the limit ! "Flex 9 is an airplane made out of 9 smaller airplanes connected...

Go to advanced search