Eric Stevens wrote:
On Sun, 16 Dec 2012 18:25:21 +0100, Wolfgang Weisselberg
Eric Stevens wrote:
On Thu, 6 Dec 2012 17:03:01 +0100, Wolfgang Weisselberg
Eric Stevens wrote:

control colour balance and that the F801s could only control exposure.
It did this on the basis of a data base of thousands of images. It
must have had color sensitivity of some kind as, for example, it could
tell the difference between a large white-walled building and a snow
scene.

So you're basically saying that there's no way to detect the
difference between a large white-walled building and a snow
scene without colour sensitivity, not even by seeing that the
snow scene was much brighter than the building?

But was it much brighter than the building?

So why do you think snow is a different colour than a white
walled building?

http://skaremedia.com/sites/default/...ickr/MyEye.jpg

Using an instrument with an amazingly variable automatic
white balance (amongst other really wild stiff) --- which is
also fed and strongly influenced by "how it should look" ---
is a very good method to measure.

You can't even tell what thing is brighter when they're only
a couple centimeters away from each other --- see optical
illusions.

Next up (and with much more justification): Santa Claus really
exists and brings everyone gifts, I've seen him in dozens of
copies in the mall.

-Wolfgang