Reduced size output oversharpened
When I 'develop' images to jpeg quality 80 with long edge set at 1680 pixels the images are way over sharpened. I use a very low sharpening level (typically the default option of 'pre (or output ) sharpening 1'). When I use this level for full output size in tiff the result is a very light sharpening as expected for a pre-sharpening. However for the jpeg reduced size it is way over sharpened. I can turn off sharpening as an option, but then it is clearly not sharpened at all and it needs some.
How can I get less sharpening in this case?
How can I get less sharpening in this case?
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You could simply let the default values which you can check and tweak on the Details tab. I've never used one of those presets you mentioned. 0 -
Sure I can change the sharpening settings in details tab, but the sharpening is perfect (and minimal) for full sized tiff, but the same setting is way over sharpened for the reduced size jpeg.
I'd rather not have two variants for each image. I thought the benefit of the pro version of CO was to have multiple output recipes, but if one needs different settings to get the right sharpening for different output, then that feature is useless.0 -
In the Export dialogue box, under 'Export Recipe' have you clicked on 'Adjustments' and put a tick in 'Disable Sharpening'? 0 -
Yes, as noted in my first post i tried disable sharpening, but the images need some sharpening as none is too soft.
The sharpen settings I use are about 200/.3/.3 (this is called 'pre-sharpen; in CO) which is a fine minimal sharpening for a full size (original) image, but way too much, ridiculously so, when the output is reduced to 1680 pixels on long edge.0 -
[quote="Alex1111" wrote:
Yes, as noted in my first post i tried disable sharpening, but the images need some sharpening as none is too soft.
The sharpen settings I use are about 200/.3/.3 (this is called 'pre-sharpen; in CO) which is a fine minimal sharpening for a full size (original) image, but way too much, ridiculously so, when the output is reduced to 1680 pixels on long edge.
I think I see what you mean. I reduced an image to 1600x1200 and noticed harsh aliasing along high-contrast edges in the output file. This is with the default 'pre-sharpening' settings. If I disabled sharpening in the Export options it just softens the entire image - doesn't really reduce the aliasing.
Is it a sharpening issue, or is it that the scaling algorithm is rather crude? In Photoshop you have various resizing algorithms you can select which may give better results. There doesn't seem to be any such options in Capture One.
I can't test it right now as I'm not at home, but I wonder if turning off any pre-shaprening gives better results in downsized images?0 -
Thank you for checking this. Your description is correct, a no anti-aliasing filter look. Lots of 'hard' bright pixels and jagged edges.
For some images (foliage for example) it is horrendous and no sharpening is better, but still too soft.
For others with less detail to start it is tolerable, but then no sharpening is even worse.
I can't turn on/off sharpening selectively by image when doing a batch output of several hundred images.
When I adjust images I set sharpening to best work for the full size image which will be ultimately printed.
But I want to be able to select all images and batch process to a reduced size jpeg to send to client for review, but I can't because some look so horrible with the gross sharpening.0 -
I've had a closer look at this, and it seems to be an issue with fine detail when you reduce images to smaller sizes (like your 1600 pixels along the longest edge).
Have a look at the following comparison between Capture One and Lightroom. No sharpening was applied and both images were reduced to 1600 pixels across (the longest edge):
https://19ddbddda3019dc04b00669d83c0e2112d946335.googledrive.com/host/0BxLLFMCS8jrCR3pXSU93WXZWYnc/C1-LR.jpg
The Lightroom image is definitely smoother with less jaggies along the fence line and gate. The lines on the corrugated iron fence are rendered much cleaner in Lightroom too.
I used no sharpening in both Capture One (either pre-sharpening or on export) and Lightroom. So sharpening shouldn't be the issue at all - it seems like we are looking at the scaling algorithms.
What do you think? Is this the kind of thing your are seeing?0 -
[quote="Alex1111"] wrote:
Thank you for checking this. Your description is correct, a no anti-aliasing filter look. Lots of 'hard' bright pixels and jagged edges.
For some images (foliage for example) it is horrendous and no sharpening is better, but still too soft.
For others with less detail to start it is tolerable, but then no sharpening is even worse.
I can't turn on/off sharpening selectively by image when doing a batch output of several hundred images.
When I adjust images I set sharpening to best work for the full size image which will be ultimately printed.
But I want to be able to select all images and batch process to a reduced size jpeg to send to client for review, but I can't because some look so horrible with the gross sharpening.[/quote]
I'm wondering what you're making different than I because on a normal base I've set two output recipes, one for Web content at 1,800px on the long side and 60% JPG quality, sRGB and the other at 100%, 95% and aRGB. Usually I don't alter the sharpening settings on the Details tab from the ones suggested by default of C1 (160,1,1, for example on a RX10 file I've checked right now). If I want to see jaggies in the 1,800px output I have to view them in 200-300%. In either output recipe I have shapening enabled. Puzzled.0
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