Improve company productivity with a Business Account.Sign Up

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 220
  • Last Modified:

Graphic filters

I would like to know if there is a web site where I could find algorithms about graphic filters. Or, if someone knows about some it would be very nice.

Thanks!
0
fmichaud061597
Asked:
fmichaud061597
  • 8
  • 4
  • 3
  • +5
1 Solution
 
Alisher_NCommented:
0
 
fmichaud061597Author Commented:
It's not what I am looking for. I want filters like Sobel, prewit, Sepia, etc.
0
 
eal4Commented:
Here is one site;
http://pico.i-us.com/filters/ffcategories.htm

Go to this search engine and type in "Graphics Filters", the site list is long.
0
Get 10% Off Your First Squarespace Website

Ready to showcase your work, publish content or promote your business online? With Squarespace’s award-winning templates and 24/7 customer service, getting started is simple. Head to Squarespace.com and use offer code ‘EXPERTS’ to get 10% off your first purchase.

 
eal4Commented:
Naturally you need the engine address!!!
http://infind.inference.com
0
 
fmichaud061597Author Commented:
Adjusted points from 100 to 500
0
 
fmichaud061597Author Commented:
These links were useless. I asked about web sites where I could find graphic filters algorithms not plug-ins for photoshop. I don't have time to make researches on the web.

I need only 3 filters. Not sobel or prewit please.
0
 
gikamCommented:
0
 
fremsleyCommented:
you might go to

  http://www.gimp.org/

and download the source code of the gimp, a graphics manipulation program with many filters.
0
 
eal4Commented:
If you don't have time to search the web, what makes you think that we have an abundance of time to do it for you?
0
 
fmichaud061597Author Commented:
eal4: I tought someone else could have some algorithms on his computer. I never told that someone else should do search for me.
0
 
gikamCommented:
did u try my link?
0
 
TSMITHCommented:
I know you were in a rush to get the algorithms. Are you still interested?

I know Prewitt and Sobel and have researched thier variations. If you want in-depth explinations, would you want algorithms in C code, pseudo, or just explained in plain English?

Hope I can help
0
 
LischkeCommented:
This one is perhaps what you are looking for:

http://www.efg2.com/lab/

Ciao, Mike
0
 
hewey01Commented:
fmichaud :

O.k., I don´t know where are you planning to use the filters, but the main mathmatical algorithm fore some of the filters u asked for are:

Derivative Filters:

Roberts:  

            1  0
            0 -1

or:
             0  1
            -1  0


Prewitt:

          -1 -1 -1
           0  0  0
           1  1  1

or:
           -1 0 1
           -1 0 1
           -1 0 1

Sobel:


          -1 -1 -1
           0  0  0
           1  2  1

or:
          -1 0 1
          -2 0 2
          -1 0 1

You must apply this matrix to all of your image matrix by simple multiplication. The boundaries of the image remain the same.

If I was of help, and you need more you can contact me.

Also I would like to know where are you planning to use them so I can give you more info.
0
 
fmichaud061597Author Commented:
I said that I don't need Prewit nor Sobel filters.
0
 
hewey01Commented:
fmichaud :

So why you answered Alisher_N  that you wanted Prewit an Sobel filters? (comment #2) O.k. I read the other comment where you say you don´t want them! sorry!

What kind of filters do you want? So I can send them to you if I have them.

HEWEY
0
 
hewey01Commented:
fmichaud:

Do you care if they are in the frecuency domain?
0
 
fmichaud061597Author Commented:
I said that I don't need Prewit nor Sobel filters.
0
 
fmichaud061597Author Commented:
Sorry for the last post. It was an error.

My work on filters is now done.
0
 
hewey01Commented:
O.k., good luck fmichaud, if can help you some other time, i´ll be glad.

HEWEY
0
 
fmichaud061597Author Commented:
Ok, thank you! Here are the points!
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Featured Post

Get 10% Off Your First Squarespace Website

Ready to showcase your work, publish content or promote your business online? With Squarespace’s award-winning templates and 24/7 customer service, getting started is simple. Head to Squarespace.com and use offer code ‘EXPERTS’ to get 10% off your first purchase.

  • 8
  • 4
  • 3
  • +5
Tackle projects and never again get stuck behind a technical roadblock.
Join Now