[Bf-vfx] Bf-vfx Digest, Vol 6, Issue 2

[yves]

Well in fact sensors are quite limited in diversity. I mean commercials 
ones.
Here is a link to a site that explain the different types of sensors 
used in camera
http://www.cambridgeincolour.com/tutorials/digital-camera-sensor-size.htm

Mostly mobile camera today use 2/3" sensors.  When asked for the size by 
blender, that is the dimensions you can enter or in m/m
Otherwise you may find your size in their diagram.
Now regarding the latest mobiles on the market, iphone 4 and Android, I 
am not sure they use standard sizes.
So it would be interesting to setup a database of sensor sizes and their 
specs
There is a large variety of chips sensors that are used in many types of 
applications where light or other radiations are involved and these 
sensors dimensions are variable.
yves

On 10/6/2011 12:00 PM, bf-vfx-request at blender.org wrote:
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> Today's Topics:
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>     1. camera and lens data for tracking setup (yves)
>     2. Re: camera and lens data for tracking setup (Fran?ois T.)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 05 Oct 2011 12:35:47 +0200
> From: yves<yves at peekhit.com>
> Subject: [Bf-vfx] camera and lens data for tracking setup
> To: bf-vfx at blender.org
> Message-ID:<4E8C3303.7010001 at peekhit.com>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Hello
> I was testing / learning your interface in the tomato branch and one of
> the data requested to setup the camera tracking is the size of the
> camera sensor.
> As I had been using a cell phone, Samsung it took me a while to find out
> about the camera and the sensor then once that was resolved I needed to
> know about the specs of the sensor.
> So I end up with that site that you maybe interested in and also for the
> others users
>
> http://www.cambridgeincolour.com/tutorials/digital-camera-sensor-size.htm
>
> I have some past experience of tracking data on 2D images having
> produced stitching engines in the 90s for mocap, TV and also space apps
> like satellites and the hubble.
>
> With the app PT Gui de Helmut Derch at the university of Iena, I
> developped some interfaces using trackers defined for hot spots by
> users.  We had lots of problems with that technique from the user
> parts,  screen resolution, human vision, and also quality of the
> pictures / images resolution and so on..
> So at the end we did a magnifier, like the one you have, but that did
> not much for the selection of hot spots.
> Since then using Fourier transforms for automatic discovery of hot spots
> has been really a working path..
> I am looking forward to see your progress in that field because lots of
> things can be done from there..
> Take care
> Yves
>
>
>
> ------------------------------
>
> Message: 2
> Date: Wed, 5 Oct 2011 15:38:09 +0100
> From: Fran?ois T.<francoistarlier at gmail.com>
> Subject: Re: [Bf-vfx] camera and lens data for tracking setup
> To: "Blender motion tracking&  VFX"<bf-vfx at blender.org>
> Message-ID:
> 	<CABE+dDbbtwzEVVkx2hn0eNnmDqAEbwiijPdznD5VPosWW9Pq1Q at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> hehe :)
> I bet its not easy to find sensor size for a phone :p
> Did you find one then ?
>
> 2011/10/5 yves<yves at peekhit.com>
>
>> Hello
>> I was testing / learning your interface in the tomato branch and one of
>> the data requested to setup the camera tracking is the size of the
>> camera sensor.
>> As I had been using a cell phone, Samsung it took me a while to find out
>> about the camera and the sensor then once that was resolved I needed to
>> know about the specs of the sensor.
>> So I end up with that site that you maybe interested in and also for the
>> others users
>>
>> http://www.cambridgeincolour.com/tutorials/digital-camera-sensor-size.htm
>>
>> I have some past experience of tracking data on 2D images having
>> produced stitching engines in the 90s for mocap, TV and also space apps
>> like satellites and the hubble.
>>
>> With the app PT Gui de Helmut Derch at the university of Iena, I
>> developped some interfaces using trackers defined for hot spots by
>> users.  We had lots of problems with that technique from the user
>> parts,  screen resolution, human vision, and also quality of the
>> pictures / images resolution and so on..
>> So at the end we did a magnifier, like the one you have, but that did
>> not much for the selection of hot spots.
>> Since then using Fourier transforms for automatic discovery of hot spots
>> has been really a working path..
>> I am looking forward to see your progress in that field because lots of
>> things can be done from there..
>> Take care
>> Yves
>>
>> _______________________________________________
>> Bf-vfx mailing list
>> Bf-vfx at blender.org
>> http://lists.blender.org/mailman/listinfo/bf-vfx
>>
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>