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Affinity Photo 2: High Pass Filter Sharpening Inconsistency


PKoch

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I have a question concerning sharpening with High Pass Filter. Here are the steps I carried out:

Experiment 1:

1. Open an image preferably with some pronounced edges included.   2.  Duplicate image   3. Click Filter => Sharpen =>High Pass   4. Select radius e.g. 5 and monochrome   .

The preview emphasizes edges as anticipated.  As soon as I click  APPLY   all the  edges are smoothed out (blurred) and is not consistent with the Preview anymore (before clicking Apply), The blend mode was at 'normal'.

The next experiment used the same picture as before but this time applying High Pass Live Filter using the same radius setting  as above. Preview as anticipated. When I flatten the layers (leaving blend mode at normal) the edges are pronounced as desired (i.e. result obtained before and after flattening is identical a). No smoothing effect (blurring) encountered. 

My question: Why are the results between experiment 1  and 2 different. Experiment 1 seems to smooth out the sharpening effects (does not match the preview as outlined above) as soon as the command button àpply´is clicked.

Currently it seems that the Live Filter provides reliable results. Any clue ?

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Welcome to the forums, :)

  • First, are you viewing at 100% or less? Filters, effects, ect, are best viewed at 100% Zoom.
  • The High-Pass Sharpening Filter should use one of the Light Blend Modes applied. Overlay, Screen, and Hard Light seem to work better. Normal Blend mode is not going to provide an accurate representation of the High Pass Filter.
  • The destructive High Pass filter, has the 3 Views at the bottom of the dialog. Zoom to 100%, and use the Split View to see what the filter is doing.
  • With the Live High Pass, again zoom to 100%, and then toggle the visible button in the Layers panel to see.
  • The Radius amount is dependent on the resolution of your image. The higher resolution images may require a larger radius.

Affinity Photo 2.5..; Affinity Designer 2.5..; Affinity Publisher 2.5..; Affinity2 Beta versions. Affinity Photo,Designer 1.10.6.1605 Win10 Home Version:21H2, Build: 19044.1766: Intel(R) Core(TM) i7-5820K CPU @ 3.30GHz, 3301 Mhz, 6 Core(s), 12 Logical Processor(s);32GB Ram, Nvidia GTX 3070, 3-Internal HDD (1 Crucial MX5000 1TB, 1-Crucial MX5000 500GB, 1-WD 1 TB), 4 External HDD

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