Re: Another Question About Webcams in F13

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On Mon, 2010-11-01 at 17:55 -0600, Manuel Escudero wrote:
> In the webcam features, it says the cam has a 5MP resolution
> interpolated, but in the instructions it says the cam has a 1.3 MP
> Resolution, wich is really poor for what I wanna do.

Interpolated means artificially created resolution.  You don't actually
get more detail.

Imagine an image formed from the following bitmap:

   ***
  *****
 *******

Take that as being the actual resolution of a device.  Now, double
everything up.

     ******
     ******
   **********
   **********
 **************
 **************

You get a bigger, but chunky picture.  Interpolating is increasing the
picture size, but not as a simple doubling up.  It's making assumptions
about what would be in between the original picture.  It'd space apart
the original data, and fill in the dots between (as a simplistic
approach).  So you'd get a much more triangular-looking object than my
second example (less steps).

Depending on how good the interpolation is, it will look better than
simply magnifying the picture, but not as good as a picture that
actually was higher resolution.

-- 
[tim@localhost ~]$ uname -r
2.6.27.25-78.2.56.fc9.i686

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