how to implement photoshop's XXX effect

hi photoshop users
I am asked to implement photoshop's "accented edge" effect with C++. Google tells nothing about that.
Can anyone describle the algorithm for me. And I also want to know where do so many photoshop's effects
come from? Do they invented by Adobe or published by journal papers? Thanks!

bear

Regarding
"... I am asked to implement photoshop's "accented edge" effect with C++. Google tells nothing about that. ..."

Do a web search for an exact match ... using the term ...

unsharp mask

and sooner or later you'll find a site that will give you the "theoretical explanation" of how it works.

Regarding:
"... And I also want to know where do so many photoshop's effects come from? Do they invented by Adobe or published by journal papers? ...."

Actually ... they come from just about everywhere ... with a heavy emphasis on the imaging processing (mathematics) community. That's a fairly large (and "deep") specialty ... and if you are going to do programming in that field, you might want to sign up for some grad-school level courses in the subject.

"bear" wrote in message

hi photoshop users
I am asked to implement photoshop's "accented edge" effect with C++. Google tells nothing about that.
Can anyone describle the algorithm for me. And I also want to know where do so many photoshop's effects
come from? Do they invented by Adobe or published by journal papers? Thanks!

bear

Hi RSD99,
Do you mean "accented edge" is the same as "unsharp mask"? but I can see they are different except
at edges and corners. I have some demos on
the original image:
http://learn.tsinghua.edu.cn/homepage/2003216147/orig.jpg the "accented edge" :
http://learn.tsinghua.edu.cn/homepage/2003216147/aedge.jpg the "unsharp mask"
http://learn.tsinghua.edu.cn/homepage/2003216147/usm.jpg What is the problem? Thanks!

That looks more like the output of an image analysis program (tooo Meeeeeee).

Suggestion:
Go to Reindeer Graphics, and read through their "Image Analysis Guide." http://www.reindeergraphics.com/

"bear" <

wrote in message

Hi RSD99,
Do you mean "accented edge" is the same as "unsharp mask"? but I can see they are different except
at edges and corners. I have some demos on
the original image:
http://learn.tsinghua.edu.cn/homepage/2003216147/orig.jpg the "accented edge" :
http://learn.tsinghua.edu.cn/homepage/2003216147/aedge.jpg the "unsharp mask"
http://learn.tsinghua.edu.cn/homepage/2003216147/usm.jpg What is the problem? Thanks!

hi RSD99,
What you have pointed to me is some basic image processing techniques. I am persueing my master
degree and familiar with these techniques. I am sure that accented edge is the composition of simple
methods, but dont know what and how they get together.

bear

hi RSD99,
What you have pointed to me is some basic image processing techniques. I am persueing my master
degree and familiar with these techniques. I am sure that accented edge is the composition of simple
methods, but dont know what and how they get together.

bear

hi RSD99,
What you have pointed to me is some basic image processing techniques. I am persueing my master
degree and familiar with these techniques. I am sure that accented edge is the composition of simple
methods, but dont know what and how they get together.

bear