Foundation Camera Board information


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by towolf » Sat May 25, 2013 11:44 pm
fastmapper, want to take a stab at deriving aperture too?
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by jbeale » Sun May 26, 2013 1:14 am
and by the way, having looked at some sample full-frame images- this lens is better than might be expected for the size and price.
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by fastmapper » Sun May 26, 2013 4:24 am
towolf wrote:fastmapper, want to take a stab at deriving aperture too?


Sure. I presume that you are looking for an f-stop rating for the lens.

It's hard to measure the physical diameter of the lens without taking it apart so I estimated the diameter of the front lens opening using a high resolution photograph of the camera. I don't expect my estimate is very accurate but I think that front opening is about 1.8mm in diameter. Using a focal length of 3.60mm, the f-stop would then be 3.60 / 1.8 or 2.0.

There is a possibility that internal elements of the lens reduce the effective diameter available for gathering light. Any amount of this would increase the f-stop rating.
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by jamesh » Sun May 26, 2013 9:48 am
fastmapper wrote:Here is a focal length update.

Now that the full field of view is available for still photos, I have repeated my estimation of focal length. To do this I took photos of a measuring tape at 6 different distances from the camera. I estimate that the focal length of my Raspberry Pi camera is 3.60+/-0.01mm.

It would be great if the EXIF tags of raspistill images could be populated with a focal length of 3.6mm until a better value is available.


OK, will do that. It needs firmware change (and I need to investigate the other missing EXIF data as well, and some other stuff), so won't be a quick fix.
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by simplesi » Sun May 26, 2013 9:53 am
I think the fact that only 10,000 got out there could be the new way forward for Raspberry Pi releases :)

Put a new piece of kit/software out - let the uber-geeks crawl all over it - then when they can't find anything else - release it to the lesser spotted geeks :)

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by mikerr » Sun May 26, 2013 1:31 pm
simplesi wrote:I think the fact that only 10,000 got out there could be the new way forward for Raspberry Pi releases :)

Do we know numbers of cameras released ?
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by simplesi » Sun May 26, 2013 3:07 pm
I thought I heard Eben at MakerFaire say there were 10,000 made originally

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by jamesh » Tue May 28, 2013 11:13 am
Yes, 10k. Problems with demand predictions but also actually getting enough parts. 9900 or so were actually released I think - 80-100 kept back for testing/Foundation use.

Production is being ramped, but again, parts supply may cause delays.
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by wallarug » Tue May 28, 2013 11:21 am
jamesh wrote:Yes, 10k. Problems with demand predictions but also actually getting enough parts. 9900 or so were actually released I think - 80-100 kept back for testing/Foundation use.

Production is being ramped, but again, parts supply may cause delays.


How are software improvements going?
i) Frame rate above 30 fps for 720p and 640p
ii) Images not being cropped to 1920 x 1080 when higher settings used
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by jamesh » Tue May 28, 2013 1:09 pm
wallarug wrote:
jamesh wrote:Yes, 10k. Problems with demand predictions but also actually getting enough parts. 9900 or so were actually released I think - 80-100 kept back for testing/Foundation use.

Production is being ramped, but again, parts supply may cause delays.


How are software improvements going?
i) Frame rate above 30 fps for 720p and 640p
ii) Images not being cropped to 1920 x 1080 when higher settings used


Capture at full rez was fixed and released last Friday. No movement on the other modes yet. Day job (and children needing some sort of attention) getting in the way.
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by jbeale » Tue May 28, 2013 6:38 pm
jamesh wrote:9900 or so were actually released I think - 80-100 kept back for testing/Foundation use. Production is being ramped, but again, parts supply may cause delays.

Wow, I thought there would be more, so I feel lucky to have got one. I am looking forward to getting a few more, so I will feel better about doing dangerous / non-reversable hacks to one of them. Just like early days of the R-Pi board, I see the camera offered on ebay for nearly double the list price.

By the way, I have added quite a bit of info to the elinux page on the RPi camera, might be easier to reference than the endless forum threads: http://elinux.org/Rpi_Camera_Module
Code: Select all
1 Introduction
2 Technical Parameters
3 Sample Programs
4 Known Issues
5 Troubleshooting
    5.1 Camera not working at all
    5.2 Colored Banding or Flickering on video
6 Customizing
    6.1 Changing the ribbon cable
    6.2 Adjusting Lens Focus
    6.3 Macro, Wide, Tele lenses
    6.4 Removing IR Filter
    6.5 Housings
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by wallarug » Tue May 28, 2013 10:23 pm
jbeale wrote:
jamesh wrote:9900 or so were actually released I think - 80-100 kept back for testing/Foundation use. Production is being ramped, but again, parts supply may cause delays.

Wow, I thought there would be more, so I feel lucky to have got one. I am looking forward to getting a few more, so I will feel better about doing dangerous / non-reversable hacks to one of them. Just like early days of the R-Pi board, I see the camera offered on ebay for nearly double the list price.

By the way, I have added quite a bit of info to the elinux page on the RPi camera, might be easier to reference than the endless forum threads: http://elinux.org/Rpi_Camera_Module
Code: Select all
1 Introduction
2 Technical Parameters
3 Sample Programs
4 Known Issues
5 Troubleshooting
    5.1 Camera not working at all
    5.2 Colored Banding or Flickering on video
6 Customizing
    6.1 Changing the ribbon cable
    6.2 Adjusting Lens Focus
    6.3 Macro, Wide, Tele lenses
    6.4 Removing IR Filter
    6.5 Housings



Great Work!! I saw this last night when I was doing a bit of research.
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by wallarug » Tue May 28, 2013 10:24 pm
jamesh wrote:
wallarug wrote:
jamesh wrote:Yes, 10k. Problems with demand predictions but also actually getting enough parts. 9900 or so were actually released I think - 80-100 kept back for testing/Foundation use.

Production is being ramped, but again, parts supply may cause delays.


How are software improvements going?
i) Frame rate above 30 fps for 720p and 640p
ii) Images not being cropped to 1920 x 1080 when higher settings used


Capture at full rez was fixed and released last Friday. No movement on the other modes yet. Day job (and children needing some sort of attention) getting in the way.



Does that mean I have to do a apt-get update/upgrade ?? Or do I have to get the source and compile it?
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by jamesh » Tue May 28, 2013 10:49 pm
apt-get should do it.
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by wallarug » Wed May 29, 2013 12:49 pm
jamesh wrote:apt-get should do it.


Ok, done that now.

How can I tell if it is working as expected?
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by gregeric » Wed May 29, 2013 1:04 pm
Take a picture! Then compare that image with video footage of the same scene: a still with the latest fixes has a wider field of view than the video; with the original software, it had a narrower field of view.
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by jbeale » Wed May 29, 2013 2:15 pm
gregeric wrote:Take a picture! Then compare that image with video footage of the same scene: a still with the latest fixes has a wider field of view than the video; with the original software, it had a narrower field of view.

(Unless you chose still dimensions with a 16x9 aspect ratio, in which case you got the same field of view.)
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by jamesh » Wed May 29, 2013 2:37 pm
gregeric wrote:Take a picture! Then compare that image with video footage of the same scene: a still with the latest fixes has a wider field of view than the video; with the original software, it had a narrower field of view.


If you take a picture with preview on then you will notice a big change in FOV at the point of capture since the preview FOV is very different now.
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by bullen » Thu May 30, 2013 6:38 am
bullen wrote:One thing though, can you make the band narrower and slim so it can squeeze out from pibow case above the ethernet plug?


The band fits, it's just that the camera port is a couple of millimeters unaligned to the ethernet port.

How could you guys miss that?! So you have to squew the cable somewhat, but if you insert it properly in the port it's not a problem!
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by wallarug » Thu May 30, 2013 6:53 am
jamesh wrote:
gregeric wrote:Take a picture! Then compare that image with video footage of the same scene: a still with the latest fixes has a wider field of view than the video; with the original software, it had a narrower field of view.


If you take a picture with preview on then you will notice a big change in FOV at the point of capture since the preview FOV is very different now.


Ok Done. See the difference here on this website: http://cmdlab.zapto.org/RPi.html

If you get confused by what you are seeing this might help:
http://www.theage.com.au/environment/weather/thick-fog-shrouds-sydney-and-canberra-20130512-2jfm2.html

... then again... you probably get this all the time in England :lol:
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by olgun » Fri May 31, 2013 8:35 am
Hello All,

Raspi cases are now all around but no camera case I've seen yet on the net.
Especially to avoid static discharge and short circuit hazards I think it is mandatory to have one.
Anyone that can address such a product to buy ?
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by olgun » Fri May 31, 2013 10:22 am
It seems I missed below topic that was already opened,
viewtopic.php?t=43868&p=352219
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by 0xFF » Sat Jun 01, 2013 1:17 pm
AFAIK camera module uses i2c for control.
I tried to detect camera control module by i2cdetect command but it seems it doesn't respond to i2c queries.
I would like to use i2c for switching camera LED, is it possible?

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by Gert van Loo » Sat Jun 01, 2013 11:55 pm
I would like to use i2c for switching camera LED, is it possible?

No, the LED is on its own separate GPIO line and can not be controlled through the I2C.
Also you do NOT wan to mess with the I2C whilst the camera is running.
You are likely to interfere with the normal command flow.
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by Gert van Loo » Sat Jun 01, 2013 11:57 pm
olgun wrote:Hello All,

Raspi cases are now all around but no camera case I've seen yet on the net.
Especially to avoid static discharge and short circuit hazards I think it is mandatory to have one.
Anyone that can address such a product to buy ?


Just wait a short while.
The Pi-Bow cases are made with a NC laser cutter.
I am sure they are working on a program for the camera board right now.
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