Participant

Answered

Photos seem blurry until I zoom in on photoshop

Forum|Forum|7 years ago
November 14, 2018
2 replies
11328 views

Hi All,

Photos seem unncessarily blurry until I zoom in and out of photoshop cc. It's driving me crazy (especially, when I have many photos to go through!).

What is the cause of this issue?! What can I do about this (settings, etc), it is making me scrap photos that I should not be scrapping (especially, when I use a manual focus lense at times).

Sample photo at different zoom levels...

26%

33%

50%

This topic has been closed for replies.

Correct answer davescm

Hi

The only way to judge sharpness is at 100% zoom where 1 image pixel is mapped to 1 screen pixel and avoids any interpolation

When you zoom out, another issue also comes to play. At zoom levels less than 66.7% any blending between layers uses 8 bit previews rather than the full image data.

So a zoomed out view can be used for composition etc, but for checking sharpness or blending always use 100%

Dave

O

O28078650us1a

Participant

I have the same issue. Its bothering me because it never use to do that!

davescm

Correct answer

Community Expert

Hi

The only way to judge sharpness is at 100% zoom where 1 image pixel is mapped to 1 screen pixel and avoids any interpolation

When you zoom out, another issue also comes to play. At zoom levels less than 66.7% any blending between layers uses 8 bit previews rather than the full image data.

So a zoomed out view can be used for composition etc, but for checking sharpness or blending always use 100%

Dave

M

marcoh21281877Author

Participant

Dave, that seems rather counter intuitive! That would add another process to another already (lengthy) editing process.

When flicking through photos, you want to know quickly if they are sharp at 25% or 30%, not at 100%.

Is there anyway to bypass that at all?

M

marcoh21281877Author

Participant

No you can't bypass it.

Think about it - at 25% Photoshop has to display 4x4 = 16 image pixels using just 1 screen pixel so has to take an average which introduces some blur

The 16 bit to 8 bit change at less than 66.7% is historic and was done to improve screen redraws.

Dave

Okay, but why is this the case then?

Disabling GPU scaling reduces Photoshop's functionality, but it somehow enables focus to always seem sharp (given that the photo was already 100% sharp).

NO GPU Scaling

GPU Scaling

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