Le 27/02/2013 21:18, Mathieu Dubois a écrit :
Le 27/02/2013 17:08, Thomas Kluyver a écrit :
On 27 February 2013 15:55, James Paige <[email protected]
<mailto:[email protected]>> wrote:
Oh, one more thought! This question got me curious, and after some
googling, I saw a nifty suggestion on stackoverflow. In addition to
displaying a ruler, your calibration screen could also display
photos of
some common coins, since whoever is doing the calibration might
have an
easier time locating a coin than locating a ruler.
Obviously you'll get a more accurate calibration with a larger object,
but for some purposes, I guess speed beats accuracy.
Another option would be to use a standard paper size, e.g. 'make this
line match the short edge of a piece of A4 paper'.
Thanks to you and James Paige. This confirms my first research.
There are some API in GTK but apparently (as reported for other API)
it's not very precise: for my monitor it says 212mmx339mm while from my
ruler it's more something like 209mmx330mm.
I think I will code simple program to calibrate the monitor using values
obtained by GTK as a first guess.
Just a last question: do you think the horizontal and vertical factors
has to be the same? Because list_modes() tells me that my monitor can
display: 1280x800 (ratio: 1.6), 1024x768 (ratio: 1.33), 800x600 (ratio:
1.33), 640x480 (ratio: 1.33).
Mathieu
