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by Fer
Sat Dec 09, 2017 11:31 pm
Forum: Camera board
Topic: Optical Zoom
Replies: 3
Views: 1255

Re: Optical Zoom

Is there a camera board I can attach to a pi that can provide optical zoom and I can control optical zoom programatically? Yes. There are: 1) Industrial USB cameras with C-Mount flange. Many C-Mount motorized zoom lenses are available, new and 2nd hand. Not cheap, since an industrial camera compati...
by Fer
Sat Dec 09, 2017 11:26 pm
Forum: Camera board
Topic: RaspberryPi Camera for Astrophotography
Replies: 345
Views: 104314

Re: RaspberryPi Camera for Astrophotography

Just got my 3rd v 1.3 camera and I'm wondering if there are variations in quality between individual cameras. This one seems a lot better than the last Most probably, what you're seeing is variations in focus. Raspberry Camera lens is screwed into mount and then semi-locked in place by Loctite (or ...
by Fer
Wed Dec 06, 2017 11:01 pm
Forum: Camera board
Topic: Custom lens shading tables
Replies: 85
Views: 15249

Re: Custom lens shading tables

As we already explained and illustrated, current hardware lens shading shows a few (show-stopping, for us) issues, where a software implementation using *the same correction table* works as intended. Thus we suspect a bug in the shading correction ISP pipeline. We see it's not a priority, it's under...
by Fer
Mon Dec 04, 2017 1:57 pm
Forum: Camera board
Topic: Custom lens shading tables
Replies: 85
Views: 15249

Re: Custom lens shading tables

it would be fantastic if the PI team could look into this
I second that.
I'm very grateful to PI engineers for having allowed custom lens shading correction, but as cpixip proved above, it seems the code has a few issues.
A fixed firmware/raspistill version would be very welcome. :)
by Fer
Thu Nov 30, 2017 11:31 am
Forum: Camera board
Topic: setting lens focus
Replies: 26
Views: 48377

Re: setting lens focus

The page you linked seems quite old. The author says there's no way to get a raw image from the camera module; actually it is possible since a while. C/CS-Mount camera modules are available without having to resort to expensive hand-manifactured custom mounts (search for Arducam). Spectral response ...
by Fer
Sun Nov 26, 2017 11:18 am
Forum: Camera board
Topic: Custom lens shading tables
Replies: 85
Views: 15249

Re: Custom lens shading tables

the sensor array and the complete sensor module are not necessarily made by the same manufacturer on the same production line This is not much important. The point being, those kind of sensors (1/4", 1/3.2") are designed for a certain target market, which is basically the lower tier of smartphones....
by Fer
Sat Nov 25, 2017 10:19 pm
Forum: Camera board
Topic: Custom lens shading tables
Replies: 85
Views: 15249

Re: Custom lens shading tables

So I need to use this special version of Raspistill to build a custom lens shading correction header, ok. But then, should I compile this custom header into current mainstream Raspistill (https://github.com/raspberrypi/userland/blob/master/host_applications/linux/apps/raspicam/RaspiStill.c), or is a...
by Fer
Sat Nov 25, 2017 6:37 pm
Forum: Camera board
Topic: Custom lens shading tables
Replies: 85
Views: 15249

Re: Custom lens shading tables

Actually, it would make perfect sense to have a camera module such as the OV5647 tuned for certain kind of lenses, because those sort of sensors are mostly used on (cheaper) cellphones, and nearly all cheap cellphones use very similar lenses, focal-length-wise (from 26 to 35mm in 24x36-equivalent te...
by Fer
Sat Nov 25, 2017 5:06 pm
Forum: Camera board
Topic: Custom lens shading tables
Replies: 85
Views: 15249

Re: Custom lens shading tables

Well, I'm using an even better :-) enlarger lens (Apo-Rodagon; I also have your Componon-S by the way), plus various special purpose Computar industrial inspection lenses. Indeed they have some issues with microlenses: those were probably tuned to compensate for oblique ray angles, because of the ve...
by Fer
Tue Nov 21, 2017 3:50 pm
Forum: Camera board
Topic: Camera Model 3 mmal: Cannot read camera info
Replies: 8
Views: 6961

Re: Camera Model 3 mmal: Cannot read camera info

Two other common causes for the dreaded "failed to create component" error: - broken or reverted camera flat cable (but you say it works on another RPI 3) or (very rare) broken board connector - another program is already using the camera (check possible culprits with "ps -aux") - You may also try r...
by Fer
Mon Nov 20, 2017 9:05 pm
Forum: Camera board
Topic: Camera Model 3 mmal: Cannot read camera info
Replies: 8
Views: 6961

Re: Camera Model 3 mmal: Cannot read camera info

Did you enable the camera with raspi-config on that RPI 3?
Or you may just add

start_x=1
gpu_mem=128

to your /boot/config.txt

At least on Raspbian Jessie; don't know about Raspbian stretch.
by Fer
Mon Nov 20, 2017 11:55 am
Forum: Camera board
Topic: Custom lens shading tables
Replies: 85
Views: 15249

Re: Custom lens shading tables

The project I want to use this lens for is a high-quality Super 8 film scanner, based mostly on the raspi-hardware Me too! That's exactly my project. I've been working on it since a year or so. I can now take JPEG stills very fast with a RPI3 by using a modified version of Raspivid. At the moment, ...
by Fer
Sun Nov 19, 2017 3:00 pm
Forum: Camera board
Topic: Custom lens shading tables
Replies: 85
Views: 15249

Re: Custom lens shading tables

Thank you very much, it's much clearer now. By the way I have a similar issue: I use the Camera Board with an enlarger lens, and stock lens shading correction (and sharpness! There's sharpness correction too) kicks in, giving that green center/magenta border cast you show in your Componon sample. Pr...
by Fer
Sat Nov 18, 2017 11:53 pm
Forum: Camera board
Topic: Custom lens shading tables
Replies: 85
Views: 15249

Re: Custom lens shading tables

The left half of the image shows the result with the lens shading raspistill, the right side the result obtained with the original raspistill. Clearly, the custom lens shading works in principle, but it is clear that there's still some progress possible. Well, actually, to me it looks like lens sha...
by Fer
Fri Nov 17, 2017 8:38 pm
Forum: Camera board
Topic: Custom lens shading tables
Replies: 85
Views: 15249

Re: Custom lens shading tables

cpixip: let me say I appreciate your work. I'm sorry I can't test/contribute because I'm working on headless and python-less boxes (tailored to fit), so I can't try your scripts (I don't even know anything python by the way). To add insult to the injury, I'm working on a custom version of raspivid.c...
by Fer
Tue Nov 14, 2017 1:44 pm
Forum: Camera board
Topic: Custom lens shading tables
Replies: 85
Views: 15249

Re: Custom lens shading tables

Can anyone confirm this misbehavior? Thanks!
by Fer
Fri Apr 14, 2017 2:35 pm
Forum: Camera board
Topic: Youtube streaming video and sound
Replies: 15
Views: 6161

Re: Youtube streaming video and sound

Happy to hear that! ;)
Let me know if you need more infos about parameters etc.
by Fer
Mon Apr 10, 2017 10:44 pm
Forum: Camera board
Topic: Disabling ISP processing blocks
Replies: 35
Views: 8922

Re: Disabling ISP processing blocks

Sorry to bump, I understand you engineers at RPF are overtaxed.
Just let me know which tests you may find useful to better highlight the issue.
Raw captures maybe?

Thanks a lot for your time.
by Fer
Sun Apr 02, 2017 2:10 pm
Forum: Camera board
Topic: Disabling ISP processing blocks
Replies: 35
Views: 8922

Re: Disabling ISP processing blocks

I updated the firmware (now March, 30th) without updating the kernel, and re-cloned userland from scratch, just to be sure. I disabled lens correction in RaspiStill.c, recompiled everything and did a few tests with my genuine Camera Board v1 (stock lens). I noticed two strange behaviours. 1. I see t...
by Fer
Fri Mar 31, 2017 4:13 pm
Forum: Camera board
Topic: Disabling ISP processing blocks
Replies: 35
Views: 8922

Re: Disabling ISP processing blocks

Thank you!
by Fer
Fri Mar 31, 2017 2:59 pm
Forum: Camera board
Topic: Disabling ISP processing blocks
Replies: 35
Views: 8922

Re: Disabling ISP processing blocks

Hello, first of all a big "Thanks!!" for your work, 6by9. :) Is there any (even rough) estimate as to when this update will become "production-ready" (and then available via apt-update)? I ask because, while I really like this feature (and would gladly use it on my 3rd-party camera board with high-q...
by Fer
Sat Mar 25, 2017 3:17 pm
Forum: Camera board
Topic: Youtube streaming video and sound
Replies: 15
Views: 6161

Re: Youtube streaming video and sound

My ffmpeg: ffmpeg version N-83388-gab5c4d0 Copyright (c) 2000-2017 the FFmpeg developers built with gcc 4.9.2 (Raspbian 4.9.2-10) configuration: --arch=armhf --target-os=linux --extra-libs=-lasound --enable-gpl --enable-protocol=pipe --enable-libx264 --enable-mmal --enable-omx-rpi --enable-nonfree -...
by Fer
Fri Mar 10, 2017 1:52 am
Forum: Camera board
Topic: Pi Camera v2 image quality question
Replies: 16
Views: 11044

Re: Pi Camera v2 image quality question

I've had to host this elsewhere due to size restrictions - hopefully you can see what I mean about the oversaturation in daylight. This one is less blurry but if you look at the strap on the back of the man in the middle you can see what I mean. Actually, I see two different issues: 1. blown highli...
by Fer
Wed Mar 08, 2017 3:50 pm
Forum: Camera board
Topic: Pi Camera Lens - Special Tool
Replies: 6
Views: 1803

Re: Pi Camera Lens - Special Tool

I use this one (well, they are two actually):

http://www.thingiverse.com/thing:1574661

It's for v2, but works on v1 with some success (YMMV).
The spanner of course works well to hold down the camera body; while the wrench is a bit more problematic, but with some attention it works most of the time.
by Fer
Sat Mar 04, 2017 9:13 am
Forum: Camera board
Topic: Better Camera Replacement?
Replies: 39
Views: 13910

Re: Better Camera Replacement?

No better camera, but there are a few things you can do to improve things. Study carefully camera and raspivid documentation here https://www.raspberrypi.org/documentation/raspbian/applications/camera.md You'll see that, if you can accept a lower resolution, you can run the sensor in "pixel binning"...

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