frequency separation blur number?

[anderson234]

Hi,
I've been thinking about FS blur number for a long time, for now my understanding is that, before blur, I should zoom in enough to make sure small texture,i.e. pores, be blurred and larger texture not blurred. That means,FS not only separates texture from color and tone, but also separates small texture from bigger texture.
Don't know if I'm right.

[Guest]

Re: frequency separation blur number?

How about doing the separation based on Dust and Scratches?

[Tony W]

Re: frequency separation blur number?

Hi,
I've been thinking about FS blur number for a long time, for now my understanding is that, before blur, I should zoom in enough to make sure small texture,i.e. pores, be blurred and larger texture not blurred. That means,FS not only separates texture from color and tone, but also separates small texture from bigger texture.
Don't know if I'm right.

Your thoughts seem pretty much correct to me (I do not do an awful lot of FS!).

Blurring the image just to the point where texture is lost but leaving colour transitions clear should be it.

The correct blur value will depend on image resolution and the size of the principle subject within the frame.

So zooming to view will be a good idea as your screen resolution may not be enough to match the output device, assuming you are going to print

[Sabrina81]

Re: frequency separation blur number?

For close up shots of faces, one rule of thumb is to blur enough that you can't distinguish individual eyelashes. That often works pretty well.

[anderson234]

Re: frequency separation blur number?

Thanks guys, helps a lot!

[Tulack]

Re: frequency separation blur number?

You separate what you need from what you don't need. You don't need to separate two frequencies, it can be done with infinity number of frequencies. Not just big and small texture, but thousand layers with one pixel each