[Vanhackspace] python options dialog

[dan anderson]

They've got an OS licence but they haven't actually got their source
available. (If it's python it's been compiled.) I'm not going to
bother reverse engineering it, since they say they'll put it online
eventually. There is, of course, an upside; the camera settings
dialogs should change settings on the hardware, so though run
seperately the following should let us change said settings:

<camerasettings.py>
#!/usr/bin/python
from VideoCapture import Device
camera = Device(1)
camera.displayCapturePinProperties()
camera.displayCaptureFilterProperties()
while True:
  sleep(1)
</camerasettings.py>

Obviously it needs the VideoCapture library installed. This is a
win32-specific python lib, which (fingers crossed) might work under
WINE. I don't actually own a webcam so I can't test this, but if it
doesn't work I can poke around and see what other options exist for
accessing webcam hw properties.

-D



2009/4/15 Joe Bowser <bowserj at gmail.com>:
> We should check out the source and throw it on github:
>
> Here's the URL for the code we were using last night:
> http://tbeta.nuigroup.com/
>
> On Wed, Apr 15, 2009 at 1:05 AM, dan anderson <dan.j.anderson at gmail.com>
> wrote:
>>
>> Oh, right, I forgot that it's written in python. If they're using this
>> library, or one whose image data converts easily, one can control
>> brightness and contrast of images - these are not in the hardware and
>> so are coarser and less useful, but are computationally cheap:
>> currentImage =
>> ImageEnhance.Brightness(camera.getImage()).enhance(brightness)
>> processedImage = ImageEnhance.Contrast(cuerrentImage, contrast)
>>
>> 2009/4/15 dan anderson <dan.j.anderson at gmail.com>:
>> > As long as the video camera opens via:
>> >
>> > from VideoCapture import Device
>> > camera = Device(1)
>> >
>> > Then the following two lines will open useful camera settings, which
>> > will allow us to have a clean initial image to start with, making
>> > calibration easier and giving better data because of reduced noise and
>> > a wider usable range.
>> >
>> > camera.displayCapturePinProperties()
>> > camera.displayCaptureFilterProperties()
>> >
>> > When it gets to finishing touches (possibly never) would matte
>> > blacking the interior (not just the inside lips of the rails) stop
>> > much of that background IR? It might be possible to put aligned
>> > polarizers in front of both the lights and the camera lens so that it
>> > could be used with  My materials knowledge is terrible; are there low
>> > cost polarizing materials with high IR pass? It would need more or
>> > higher output LEDs to hit the same total lumens, but it would filter
>> > out a great deal of bg noise. Hell, the easiest and most efficient way
>> > to do it, if the material's cheap enough, is to just lay a sheet over
>> > the bottom side.
>> >
>> > It was a blast, I hope to make it next week.
>> >
>> > -Dan
>> >
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