making my own filter

Hello!

I am from germany and my english isn't that good. But i'll try to explain my problem.

I know that there is the possibility to make own filters (with special spftware).

I need to program a filter, that is able to do the following things:

1. read out resolution of current image (i.e. 300 dpi)
2. read out / count all pixels of one special color (black) (i.e. 123123 pixels)
3. calculate with these values in a special mathemathic-formular
4. put out the result

Is this possible at all? Is there any problem? Iss there a site where i can look up similar stuff?
Can somebody help me programming this???

Thank you for every reply!

Actions:
just record your action and save it.

i dont think that would work. but im quite sure Adobe has SDKs for development of plug ins, available to the public.

I think you did not get me...?!?

There is no possibility to record "open image properties window" and "read out image resolution (i do this with my eyes!?!)" as an action. Anyway- if it would be possible to record the opening of the image properies window- there would be no sense in this.

Every of the mentioned features (like reading out image resolution, counting the amount of black pixels and calculating with these values in a formula) have to be fully automaticly.

Are there any other suggestions for my problem?

Hello d9thc.

I noticed your reply after my reply to kid crackle.
With SDK you mean softwafe developement kit, right?

I tried to find something on the adobe-site - but i seems that i am too stupid to find it...

perhaps somebody can give me a direct-link or something like this???

well. i kind of assumed that [yes i know] because After Effects has an SDK for its plug ins.. and since AE is more or less. PS with Keyframes i assumed the same

http://thepluginsite.com/knowhow/plugincreation.htm

and there isnt one.. apparently its a hot topic though
http://www.graphicsnews.com/modules.php?name=Surveys&pollID=20