Re: Re[2]: color video?

M. Carleer (
Tue, 20 Sep 1994 08:43:35 -0400

>> Color would be good, but I would rather sacrifice it for better
>> performance/clarity over the Network. I've been testing lots of
>> desktop video product and so far, CUSeeMe has actually had the best
>> performance (not to mention way-best price/performance!). It is also,
>> the only B/W product.
>I agree with you. I think it is much better too have better quality B/W
>transmittions than color ones with poor quality. My earlier message just
>expressed my wish that in the FUTURE, perhaps the technology will allow us
>to feasibly transmit color video across the Internet.
>For now, us Windows users don't even get sound yet for CUSeeMe. I'd much
>rather get that than color video =)
>Till later,
Dear all,

I personally think color is very important: Our eye/brain system is trained
since birth to interpret color. In understanding what is going on at the
other end of a CUSeeMe transmission, the color is of great help, especially
when the spatial resolution of the picture is not great (CUSeeMe: 160x120
pixels). On the other hand, to increase resolution of the picture by a
useful amount, you have to more or less double the linear resolution, which
means transmit 4 times more info per picture. Compare this to the
transmission of color where, because of the characteristics of the eye, you
need only to transmit around 6 percent more info, and you get the same
perceived increase in understanding of the picture. Because transmission of
color imposes such a small burden on the jerkiness of video, and because it
so much improves the comfort of viewing, I think it should be included as
fast as possible in CUSeeMe. If you are not certain of the latter ascertion,
try just to look at a small (16x120 pels) picture in color side to side with
it's B/W version, and you will clearly see that it is far easier to read the
color one, even if you are not interested by the actual color of the shirt
of the person facing you!

Cheers :-)

Michel Carleer

Laboratoire de Chimie Physique Moleculaire Phone : +32-2-650.24.25
Universite Libre de Bruxelles CPi-160/09 Fax : +32-2-650.42.32
50 Av F.D. Roosevelt e-mail:
B-1050 Bruxelles