Caedes

Desktop Wallpaper, Art, etc.

Discussion Board -> Desktop Wallpaper, Art, etc. -> Featured Image

Featured Image

::CanoeGuru
08/24/04 9:51 PM GMT
May I ask how the featured image on the home page is chosen? It seems that in the short time that I have been visiting Caedes, several images have made appearances there more than once. Is the image chosen randomly, or by one of the image mods, or by some other method?
0∈ [?]
"Even a fool is thought wise when he keeps his mouth shut."

Comments

Post a Comment  -  Subscribe to this discussion
+Samatar
08/25/04 1:00 AM GMT
I think it's just a random selection from the top rated images in the permenant galleries.
0∈ [?]
-Everyone is entitled to my opinion-
::noobguy
08/25/04 1:40 AM GMT
if you notice, its actually also very short. the next image is rotated in within a very short time. its not like they are being praised for there excellent and one image stays up there all day, they dont even stay up for a few hrs.
0∈ [?]
An image rated way too low! Dragonfly Environment
=xentrik
08/25/04 2:09 AM GMT
Actually noob, I'm pretty sure I remember a time when every page refresh brought up a new featured image. I'd assume that this was changed to reduce server load. I think that more than anything it's a way to showcase an image on the site to show what's available to new visitors.
0∈ [?]
::CanoeGuru
08/25/04 11:47 AM GMT
I did notice that the rotation of the images changes very frequently. I wasn't concerned whether or not they were being praised for being excellent, although most of them are excellent and do deserve praise. :) I was just curious as to how it was selected. There is such a wealth of great images here on Caedes, I was suprised to see it repeat as often as it does. But then again, if it changes very rapidly that would contribute to more repeat images :) That's my extreme mental powers figuring that one out! lol
0∈ [?]
"Even a fool is thought wise when he keeps his mouth shut."
*caedes
08/25/04 8:05 PM GMT
The image is automatically selected every ~15 minutes based on a selection of images in the perm. galleries with a certain minimum c-index. I have also noticed that it tends to repeat rather more than I would naively expect from the rand() funciton. =\ Maybe the minimum c-index value is too high?
0∈ [?]
-caedes
::CanoeGuru
08/25/04 8:10 PM GMT
Has the minimum c-index value for this been revised since the c-index normalization? That may be a contributing factor.
0∈ [?]
"Even a fool is thought wise when he keeps his mouth shut."
::CaptainHero
08/26/04 6:52 PM GMT
Perhaps. What is the seed for the random function?
0∈ [?]
"The whole problem with the world is that fools and fanatics are always so certain of themselves, but wiser people so full of doubts." Bertrand Russell
*caedes
08/26/04 7:24 PM GMT
Perl seeds the random number generator automatically from the random number device on the system.
0∈ [?]
-caedes
*caedes
08/26/04 10:01 PM GMT
I had a look at the image selection code. It chooses the featured image randomly from the list of images which have more than 5 votes and have a top 10% score. That means that right now it is choosing between around 90 images.
0∈ [?]
-caedes
::CanoeGuru
08/26/04 11:04 PM GMT
Do you have any inclination to change the code so more images are represented?
0∈ [?]
"Even a fool is thought wise when he keeps his mouth shut."
::CaptainHero
08/27/04 4:26 PM GMT
90 images sounds good at a rate of 1 every 15 mins. I think the top 10% is reasonable.

Perhaps they could cycle, but I guess that would be difficult as the group composition would change every time the c-indexes updated.
0∈ [?]
"The whole problem with the world is that fools and fanatics are always so certain of themselves, but wiser people so full of doubts." Bertrand Russell
::CanoeGuru
08/27/04 4:31 PM GMT
But don't the images in the top ten percent stay rather static? How often does a new image get into the top ten percent? At a rate of 1 new image displayed every 15 minutes, all the images are shown in just under 23 hours. Am I making a mountain out of a molehill? :)
0∈ [?]
"Even a fool is thought wise when he keeps his mouth shut."
::noobguy
08/27/04 4:53 PM GMT
new images constantly go into the top 10% and it constantly changes. new images often jump up into the top 10 really fast from high ratings, and then fall down from lack of downloads within a week. Making the top 10% change rather often.
0∈ [?]
An image rated way too low! Dragonfly Environment
::CanoeGuru
08/27/04 4:55 PM GMT
Good to know :)
0∈ [?]
"Even a fool is thought wise when he keeps his mouth shut."
::CaptainHero
08/27/04 4:56 PM GMT
I don't know, in theory the c-index only updates once per 24 hours. doesn't it?
0∈ [?]
"The whole problem with the world is that fools and fanatics are always so certain of themselves, but wiser people so full of doubts." Bertrand Russell
::noobguy
08/27/04 4:57 PM GMT
by "often", i mean, day to day, week to week.
and correct, its not theory, thats just the way it works haha.
0∈ [?]
An image rated way too low! Dragonfly Environment
::stuffnstuff
04/29/06 7:34 PM GMT
I would like to re-ask Rebecca's question. There have been a lot of changes recently and I am not fully understanding the new system. Is there anybody in-the-know who could explain?
0∈ [?]
Canon EOS 30D with the Canon EF 100mm f/2.8 Macro USM (strange for a kit lens, but it fits me). Gitzo Explorer G2220 w/ Manfrotto 488 Ball Head. Hoya Multicoated UV and Lexar x133 Write Acceleration
&KEIFER
04/29/06 7:50 PM GMT
Currently .. one image comes from the "perms" .. and two from the "new images"

(*counts on fingers*) .. (*gives up*) .. but i can't quote the numerics of it
0∈ [?]
See No Evil
&KEIFER
04/29/06 8:03 PM GMT
Looking good caedes. :)

QUOTE .. It is now selecting one image from the permanent collection (any c-index) and two new images in the top 85% .. Correction: top 15%. =\

and

Actually, I didn't change the top 15% part. It actually isn't as high as it sounds, right now the top 15% cutoff is at a c-index of 65
0∈ [?]
See No Evil
::stuffnstuff
04/29/06 9:41 PM GMT
Thanks. I searched, but I must have used the wrong keywords.
0∈ [?]
Canon EOS 30D with the Canon EF 100mm f/2.8 Macro USM (strange for a kit lens, but it fits me). Gitzo Explorer G2220 w/ Manfrotto 488 Ball Head. Hoya Multicoated UV and Lexar x133 Write Acceleration

Leave a comment (registration required):

Subject: