how to implement photoshop’s XXX effect

B
Posted By
bear
Dec 6, 2004
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1488
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6
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Closed
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
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R
RSD99
Dec 6, 2004
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
B
bear
Dec 7, 2004
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!
R
RSD99
Dec 7, 2004
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!
B
bear
Dec 8, 2004
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
B
bear
Dec 8, 2004
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
B
bear
Dec 8, 2004
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

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