HP Filter

[Joseph Westrupp]

Just out of curiosity, for those who typically use a high pass filter to sharpen, what radius do you normally use?

 

[KmH]

It varies according to image content and my sharpening goal.

 

[Joseph Westrupp]

It varies according to image content and my sharpening goal.

Can you give a range? And what do you mean by sharpening goal--isn't sharpening itself the goal?

 

[KmH]

I sharpen according to the use.

In other words, I sharpen differently for electronic display, than for a chromogenic print, than for a Giclée (inkjet) print. A photo can usually be sharpened more for printing, and chromogenic prints can be sharpened more than giclée prints.

Image content plays a large part. A smaller radius has to be used for an image that has a lot of edges (a high-frequency image), like a forest landscape. A larger radius can be used for a studio portrait (a low-frequency image).

For most of my work sharpening is a 3 step process: capture sharpening, local sharpening, output sharpening.

You might want to get the book: Real World Image Sharpening with Adobe Photoshop, Camera Raw, and Lightroom (2nd Edition)

 

[Joseph Westrupp]

I sharpen according to the use.

In other words, I sharpen differently for electronic display, than for a chromogenic print, than for a Giclée (inkjet) print. A photo can usually be sharpened more for printing, and chromogenic prints can be sharpened more than giclée prints.

Image content plays a large part. A smaller radius has to be used for an image that has a lot of edges (a high-frequency image), like a forest landscape. A larger radius can be used for a studio portrait (a low-frequency image).

For most of my work sharpening is a 3 step process: capture sharpening, local sharpening, output sharpening.

You might want to get the book: Real World Image Sharpening with Adobe Photoshop, Camera Raw, and Lightroom (2nd Edition)

Got you. Cheers for the suggestion.

 

[Garbz]

Not only content but also image size. If you ask someone with a 10mpx camera what settings to use for a Canon 5dMkII the exact same picture would look different due to the filter radius being applied as absolute pixels rather than percentage of image size.

My suggestion: Use smartfilters so you can play with the radius after the fact.

 

[reddau]

You cant just use the same settings for every picture, treat each photo differently to achieve the results your looking for for that specific photo

 

[Joseph Westrupp]

You cant just use the same settings for every picture, treat each photo differently to achieve the results your looking for for that specific photo

Sure, I should probably have specified a range.

I find the responses a bit strange; I asked what radius people typically used. Do you all find yourselves using such a vast range of values that you couldn't give a reasonable average?

 

[KmH]

Just out of curiosity, for those who typically use a high pass filter to sharpen, what radius do you normally use?

I find the responses a bit strange; I asked what radius people typically used. Do you all find yourselves using such a vast range of values that you couldn't give a reasonable average?

There is no reasonable average based on the vagueness of your initial question, but if you insist on someone venturing an average number guess: 16.

To your new question - I rarely use less than .5, and have used the maximum of 250 a handful of times.

High Pass filter sharpening is just one of many sharpening techniques. I can't remember the last time I used High Pass sharpening globally on a photo and probably use the technique on 5% of my images.

If you like to use High Pass sharpening, also check out Luminosity sharpening, and LAB color mode sharpening if you haven't already.

Note, when I do use the High Pass filter to sharpen, I use it on it's own layer, and I set the layer blending mode to Overlay using the Layer Styles dialog box.

 

[Joseph Westrupp]

and have used the maximum of 250 a handful of times.

Wow, really? Can you post an image where you used that radius to sharpen?

T
High Pass filter sharpening is just one of many sharpening techniques. I can't remember the last time I used High Pass sharpening globally on a photo and probably use the technique on 5% of my images.

Interesting--what technique do you normally use?

 

[Garbz]

Wow, really? Can you post an image where you used that radius to sharpen?

At this point you're no longer sharpening. Applying sharpening over a ludicrously large radius becomes a funky method of tone control. Such things are often done in wedding photos to make them appear softer while retaining sharpness.

Give it a go. It may blow your mind

 

[Joseph Westrupp]

Wow, really? Can you post an image where you used that radius to sharpen?

At this point you're no longer sharpening. Applying sharpening over a ludicrously large radius becomes a funky method of tone control. Such things are often done in wedding photos to make them appear softer while retaining sharpness.

Give it a go. It may blow your mind

I've done it many times. I was just surprised he'd used it to sharpen.