Samuli Vahonen
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 p.61 #20 · ZE/ZF/ZM Images (Official Thread!) | |
mortyb wrote:
Samuli and Makten, these are all great shots.
Would you care to share your sharpening techniques/parameters? Are they different for each photo, or do you normally run a standard action? How about global vs. local sharpening after resize?
Thanks in advance - just trying to learn more about it 
Mortyb, I really hate sitting on computer and doing photos. Therefore I have got really fast and powerful computer, and I automate everything possible. My process for web is described below and after adjusting the image in Apple Aperture I spend usually 10-15 seconds for each image for resizing and sharpening:
1. I adjust photo in Apple Aperture (white balance, recovery, black point, saturation, highlights - these are the sliders I use, I have of course presets, which I apply to all photos by default and sometimes I do some small adjustments to the values what preset gave)
2. export from Apple Aperture to 16-bit TIFF (preferrably some gamma 1.0 colorspace e.g. CIE 1931 D65, or just standard ProPhotoRGB)
3. right click image in Finder (equivalent of Windows Explorer)
4. open with -> "script name" (I have about 25+ scripts, which I have saved from PhotoShop so that they can be used as "open with" actions)
5. script resizes & sharpens the image and adds logo to corner ("which corner" is identified in the script name
6. script flattens image, converts to sRGB and saves JPG
7. I evaluate the image in Finder, if it's OK then I continue from step 8, if it's not OK I delete the file and start from step 3 but use different script (or do everything manually in Photoshop if I doubt any existing script would do no good)
8. I run other script, which removes PhotoShop thumbnail etc. from image making it about 50kb smaller
The method I use for resizing and sharpening in the scripts is step sharpening. In it image size is reduced many times and each time image is sharpened. Many of my scripts don't actually at all touch the image, when it's in final size, all sharpening happens during resizing in those scripts. Many of the images with fine detail cannot be just simply resized to end product size and then sharpened, because the fine and small detail gets lost. Also methods doing sharpening only when image is resized to final size tend to sharpen the bokeh too much, making apparent DOF even larger (like resizing to web size would not make it large enough...).
From time to time I find an image, which is not suitable for any of my scripts. Then I typically do it manually, either by tweaking one of my scripts or doing it completely manually. Sometimes I find better way of doing some step in the process, and then I improve the process, so it's on constant change.
Regarding the actual sharpening, once somebody asked about it and I made an document about the methods. However document just shows two old scripts, which I highly doubt that are anymore in use and and they should be used just as reference. This is an area where one needs to experiment a little, and on sharpening definitely don't fit to all lenses and all photos, also cameras make quite difference. Link to the document.
Do you refer with "local sharpening" to "selective sharpening"? I don't have time for that, specially for web images I could not justify the time spend on doing it. For printing sometimes it just needs to be done, then I do it, but at same time hate doing it...
And like Makten says with Zeiss there rarely is need to do any local contrast tricks, which were in everyday use with Canon's.
Samuli
PS. I think my sharpening method is based on the sharpening method you linked to in Landscape forum. But I'm not sure was it that thread or some other thread.
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