"Jerry Avins" <jya@ieee.org> wrote in message
news:2tl283F212um4U1@uni-berlin.de...
>
> The undersampling is certainly evident, but by bring the apparent wing
> motion down to what O can follow, I think the depiction is improved.
>
Indeed, it's a nice example of a down converter; mixing with 15Hz! I thought
it made a cuter demonstration than the 'stage coach wheel going backwards'
from old westerns!
Best, Syms.
p.s. Anyone know what kind of bird it is? I think it's a female Anna's
Hummingbird , http://birds.cornell.edu/BOW/ANNHUM/ .
Reply by Jerry Avins●October 19, 20042004-10-19
Symon wrote:
> Hi All,
> If anyone's interested, I captured a video yesterday of a humming bird on
> our feeder outside our apartment in Los Gatos, CA. I'm quite pleased with
> it! You can download it from
> http://home.comcast.net/~symon_brewer/Motion_16.avi . It's a 15 Mbyte AVI
> file, so only for those with broadband or a lot of patience. It plays in
> Windows Media player, but I recommend downloading it by right-clicking the
> link, and using 'save target as' to store it on your hard drive. I captured
> it with a butchered Logitech QuickCAM and a motorized TV camera zoom lens I
> bought on ebay. Total cost < $100, including the feeder and the sugar! (I
> built what I wanted with what I could get!) The obliging bird flaps at about
> 60Hz (obviously American!), I believe, so the undersampled 15 fps camera
> rate is ideal for revealing the detail of his (her?) wings beating. To give
> you an idea of scale, the yellow 'flowers' are about an inch across.
> Not quite up to BBC Bristol standards, but my budget was somewhat smaller!
> Cheers, Syms.
The undersampling is certainly evident, but by bring the apparent wing
motion down to what O can follow, I think the depiction is improved.
Jerry
--
Engineering is the art of making what you want from things you can get.
�����������������������������������������������������������������������
Reply by Jerry Avins●October 19, 20042004-10-19
Symon wrote:
> Hi All,
> If anyone's interested, I captured a video yesterday of a humming bird on
> our feeder outside our apartment in Los Gatos, CA. I'm quite pleased with
> it! You can download it from
> http://home.comcast.net/~symon_brewer/Motion_16.avi . It's a 15 Mbyte AVI
> file, so only for those with broadband or a lot of patience. It plays in
> Windows Media player, but I recommend downloading it by right-clicking the
> link, and using 'save target as' to store it on your hard drive. I captured
> it with a butchered Logitech QuickCAM and a motorized TV camera zoom lens I
> bought on ebay. Total cost < $100, including the feeder and the sugar! (I
> built what I wanted with what I could get!) The obliging bird flaps at about
> 60Hz (obviously American!), I believe, so the undersampled 15 fps camera
> rate is ideal for revealing the detail of his (her?) wings beating. To give
> you an idea of scale, the yellow 'flowers' are about an inch across.
> Not quite up to BBC Bristol standards, but my budget was somewhat smaller!
> Cheers, Syms.
Thanks!
--
Engineering is the art of making what you want from things you can get.
�����������������������������������������������������������������������
Reply by Symon●October 18, 20042004-10-18
Hi All,
If anyone's interested, I captured a video yesterday of a humming bird on
our feeder outside our apartment in Los Gatos, CA. I'm quite pleased with
it! You can download it from
http://home.comcast.net/~symon_brewer/Motion_16.avi . It's a 15 Mbyte AVI
file, so only for those with broadband or a lot of patience. It plays in
Windows Media player, but I recommend downloading it by right-clicking the
link, and using 'save target as' to store it on your hard drive. I captured
it with a butchered Logitech QuickCAM and a motorized TV camera zoom lens I
bought on ebay. Total cost < $100, including the feeder and the sugar! (I
built what I wanted with what I could get!) The obliging bird flaps at about
60Hz (obviously American!), I believe, so the undersampled 15 fps camera
rate is ideal for revealing the detail of his (her?) wings beating. To give
you an idea of scale, the yellow 'flowers' are about an inch across.
Not quite up to BBC Bristol standards, but my budget was somewhat smaller!
Cheers, Syms.