Jump to content
Mzigaib

High pass filter in COPs

Recommended Posts

Is there a way to simulate the high pass filter from Photoshop in COPs?

Or any advice of what would be the best way to sharpen your textures in COPs?

 

Thanks!

Share this post


Link to post
Share on other sites

Divide the original with a blurred version, then mulitply your result with the original. A basic sharpen filter is just a highpass multed with the original.

  • Like 2

Share this post


Link to post
Share on other sites

Hi guys! Before I start I want to thank you for the previous tips, the highpass worked very well for me.

 

I was also looking for a tip to replicate the "Soft Light" transfer but since we are already here I was wondering if anyone could also share any tips of how to replicate most or maybe all, I am sure that is possible, the transfers that Photoshop have that in COPs we don't have by default.

 

Cheers!

Share this post


Link to post
Share on other sites

highpass.png

I know it is an old topic where problem was solved with an alternative method, but I searched for High Pass specifically and came here from google yesterday. I've got "photoshopic" High Pass filter results by subtracting blurred version from original and biasing by 0.5. The difference is in blurring radius parameter, which is computed by another formula in Photoshop. They are linearly dependent, however, you just need to use several times bigger numbers in Houdini.

 

highpass.hipnc

Share this post


Link to post
Share on other sites

The Sharpen COP also does this with "Show Edges Only" enabled, though it centers around zero instead of 0.5. It also has a noise filter.

Share this post


Link to post
Share on other sites
On 07/09/2015 at 6:23 AM, anim said:

probably easiest way is using VOP filter COP and

http://www.simplefilter.de/en/basics/mixmods.html

 

or Layer or Composite COP for common modes like Darken (Min), Lighten (Max), Multiply, Add, Subtract, Difference, Screen, ...

Hi, I saw this answer and was like , cool that should be easy, after few tries, I now know my cop knowlegde is 0, I cant even figure out how to import variables from the second input into vopcop2 filter.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×