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frequency separation blur number?

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  #1  
Old 11-20-2017, 02:43 AM
anderson234 anderson234 is offline
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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.
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Old 11-20-2017, 04:26 AM
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marameo marameo is offline
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Re: frequency separation blur number?

How about doing the separation based on Dust and Scratches?
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Old 11-20-2017, 05:22 AM
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Tony W Tony W is offline
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Re: frequency separation blur number?

Quote:
Originally Posted by anderson234 View Post
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
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Old 11-20-2017, 01:46 PM
Sabrina81 Sabrina81 is offline
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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.
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Old 11-20-2017, 06:01 PM
anderson234 anderson234 is offline
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Re: frequency separation blur number?

Thanks guys, helps a lot!
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Old 11-20-2017, 06:56 PM
Tulack Tulack is offline
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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
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