stack mode median (compare pixel values)

[franni]

hey everybody,

i'm a newbie and would appriciate every hint or help for my quite specific question:

for a project i'm trying to "put" a video sequenz (so means 25 frames per second of moving landscape) into one picture via some kind of overblending.
Now comes the difficult part. I don't wanna overblend with PS blending modes since the outcome is usual and not really working, since either values are added on (so the picture becomes darker) or subtracted (picture becomes lighter). So now i'm looking for some kind of script that somehow compares each pixel value (colour) of all frames overlying (up to a couple of hundreds) and prints not a a blending of all values but one value that exists the most.

so if there is a stack of 10 pictures and on one pixelcoordinate there are 10 values for the colour then it prints the one of them, meaning this one which appears most or compared to a range of colour (light blue or something).

so something similar to the stackmode median, but not quite alike

is this a good way to do in PS? i thought maybe because, there are already scripts that are doing stuff .. but by now i figured out that i cannot really access (physically and logically) PS blending modes and change parameters there.

has anybody done something similar or knows a script (javascript) which could be rewritten to my likings?

i would really appreciate any tips - cause this is going to be my semester project for university and i'm kinda stuck here.

suggestions for other software or programming environment would be good too.

thank u so much
fran

[franni]

ok so, what i figured out now, is that stack mode median IS somehow doing what i want. Its comparing pixel values and is printing the 50% average out of it. i was looking for some javascript file to alternate but couldnt find any. has anybody any hints?

thank u!

[Mike Hale]

Scripting is just too slow to work with each pixel in one document much less several.

I would think that you are going to have to use stack modes or perhaps a pixel bender filter.