Need Help with Sharpening

Yes, I am using 5.8. Thanks for that information especially since I have NOT been able to get acceptable (and logical) sharpening. I have been trying to use the one you identified to NOT use. Does this NOT use one have problems or is the other just better for good results.

I expose a lot of images with people (family groups and other Portrait types) and (in my opinion) sharpening needs to be especially controlled. More critical than for scenery.

Did you do something regarding the BOLD test since all posts appear to NOT have any of this now.

The sharpening in details tab (the one at top of my screenshot), is applied almost at the end of the processing (just before resize and save to tiff or jpg). It can introduce sharpening halos.

The capture sharpening in raw tab is applied very early in processing, just after demosaic and therefore is much less prone to halos.

Additionally, as Capture Sharpening is applied very early, you can see its outcome even at less than 100% preview (of course less than at 100% preview because of downsizing, but still)

This is really helpful comments especially since you described exactly the issue I was having regarding Halos.
I really appreciate you working with me and being very helpful while I try to learn more regarding proper use of this software.

Hopefully, my experimenting regarding Capture Sharpening will get me “over the hump” for the very important function of Sharpening.
Thanks again …

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I guess it will :wink:

Please give feedback :+1:

Unfortunately, I have not (so far) been able to match the sharpening method I use in Photoshop when displaying the image (after sharpening) that is very clear with a “crisp” appearance like viewing a photo printed on a good grade of Glossy Photo Paper.

The RT Capture sharpening seems to rather quickly over sharpen to appear like sand paper. This of course can be reduced or eliminated by “backing off” the sharpening settings. The RT sharpened image (so far) has a duller (non crisp) appearance especially for the darker parts of the image (test image is a Family Group picture).

Also, there are some slight glare lighted areas on faces which are close to or above 255.

In Photoshop, I normally first select Highlights then invert to select shadows and apply USM sharpening of normally 30-20-0 and occasionally slightly higher 40-30-0. Using either of these settings have little to NO effect in the issue of changes Highlights close to 255 or above.

When sharpening the entire image (not just to shadows) this sometimes adversely affects the Highlights to be too high - as described above.

Is there a way in RT to select Shadows or select highlights then invert to select shadows so to be able to apply sharpening ONLY to the shadows ?

@vern Thanks for the feedback.

Capture sharpening is not meant to match Photoshop sharpening. Photoshop sharpening is output sharpening while capture sharpening is input sharpening (immediately after demosaic)

Can you show an example? I’m really interested.

Not for Capture Sharpening

Have you tried the RL Deconvolution sharpening in RT? I find it to be loads better than any type of USM

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Hello @Vern,

If you want to learn more about RawTherapee you can take advantage of some some video tutorials on YouTube :slight_smile:

Just to name a few (there is also the sharpening topic…):

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Regarding: Have you tried the RL Deconvolution sharpening in RT?
No I have not but I will give it a try.
I will continue with the present image with the Capture Sharpening applied and go to the “Final Image Sharpening” using the suggested method instead of using USM — Thanks

Unfortunately, I have not adapted to the You Tube presentations for trying to learn – the reason is that the images are so VERY small and hard to know what is being selected (in menus) in the Author’s presentations. This applies to all of the various You Tube “Mini Movies” that I have attempted to use and not just to RT subjects.

I can’t post the test image (even if I knew how) on a public Forum. I may later use a different image (without people in the image) and adjust up to the current status of test image and find out how to post the illustration I discussed.

Capture sharpening also is RL Deconvolution, though at a different step in RT pipeline

Hello @vern

Unfortunately, I have not adapted to the You Tube presentations for trying to learn – the reason is that the images are so VERY small and hard to know what is being selected (in menus)

Yeah. You are right.
This is particulary true for the videos I have just suggested you.
Actually, they are much more meant for advanced users…

What about this one (Sharpening stuff…):

Needless to say, you can continue asking questions on this forum as well.
This is the reason for which it has been created: to help users :slight_smile:

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Regarding my original question:
Can this ( selecting shadows) be done in RT prior to and to be used for ANY type sharpening in RT.

This presentation ( as far as I watched – and listened) first 3 to 4 minutes is primarily ONLY audio. Unfortunately, my hearing is not the best. Guess it faded even before I got older (I will be 88 next month). However, I do appreciate you trying to help me.

I am not one to give up easily but (so far) I am getting the impression that my present procedures and programming TOOLS are not so bad and I am having a hard time finding better methods for improvement.

For sharpening in details tab of RT you can control it by this adjuster
grafik

For capture sharpening that is not possible atm

Hello @vern

I will be 88 next month

WOW. And you still wish to earn new stuff :slight_smile:

first 3 to 4 minutes is primarily ONLY audio.

Can’t understand what’s going on your side…
In short, this specific YouTube tutorial is primarily a video, with its audio part in English.
The tools of RawTherapee are huge, in the video, as far as their visualization in this video is concerned.
Needless to say, you must watch the video at the maximum quality, that is 720p (the topmost for these specific videos on YouTube):

Here is the link for this channel, where there are other YouTube videos concerning RawTherapee, by the same author.
All these videos have both the video and the audio part:
https://www.youtube.com/user/majun26/videos

If you have problems with videos you might stick with RawPedia (RawTherapee’s documentation) and of course continue asking on this forum :slight_smile:

I spent close to half day with this Sharpening choices and never was I able to get what I was hoping for – to select ONLY shadows to apply sharpening to and NOT affect highlights.

This perhaps can be done by someone experienced in RT but I failed in my efforts to do this.

Regarding your comment:
WOW. And you still wish to learn new stuff :

I really like Photography – I must since I have been in it since the early 1950’s.

Also, I like and enjoy learning and using well designed software Programs where advanced programming was applied.
I worked in Computer Systems, Programming, Management, and Consulting for close to 30 years and during this time I programmed in more than 10 Programming Languages – which all during that time were for the IBM big Main Frame Computers.
Most of that time, I was Manager of all Computer functions including Systems Design, Programming and Operations.
Later, I did programming for the PC Computers .

I have always enjoyed learning NEW things and also believe it keeps a person’s mind active and productive.

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@vern Salutations! There is no substitute for a nimble manner at any age.

I find that the ‘local contrast’ tool can help give images a crisper look. My general setting is to move the dark slider about to half of the default and to leave the light where it is (sorry, i forget the exact names of the sliders off hand). I play with radius visually, but it usually go lower than the default.