Participant

Question

Qualité des images après l'exportation

Forum|Forum|1 year ago
August 12, 2024
3 replies
598 views

Pourquoi une fois les retouches terminées dans le module développement, la photo est de moins bonne qualité dans la bibliothèque et même chose une fois exportée?

macOS

This topic has been closed for replies.

Per Berntsen

Community Expert

To assess sharpness and noise, as well as other image detail, you must view the image at 100%. (this also applies to exported images)

At this magnification, one image pixel is represented by one screen pixel, and this presents you with a true representation of the image. Any other magnification will be inaccurate and misleading because the image has been scaled.

Different applications use different algorithms when scaling (sharpening and smoothing), and in this context, Library and Develop can be considered as different applications, since they use separate previews.

At 100%, all applications should display identically.

A

alainbrown7Author

Participant

Ohhhhhhh, I think I understand now...I think lolll

So the view at 100% in the develop or Library modul will show the "true" representation and the "true" image quality of the photo and this is what my photo will look like after export in a personal folder on my Mac.

Then if I look the final photo with an apps like "Aperçu" (sorry, french name loll) on my Mac, I 'm gonn see the same image...same quality...same f..k* noise lolllll

Right?

Per Berntsen

Community Expert

The exported image will not necessarily be identical to the previews you see in LrC.

There are several options in the Export dialog that can change the appearance – like resizing and output sharpening.

Also note that the jpg format uses lossy compression – the small file size is made possible by some quality loss. Even with Quality set to 100, there is some degradation, although it might be very hard to see. (there is no point in using a quality setting higher than 85, anything higher will just increase the file size with no gain in quality)

And like I said before, you also have to view exported images at 100%.

100% is a reference point that quickly lets you determine the quality of an image. With some experience, you'll soon learn what a good quality image should look like.

I always view my images at 100% before doing anything to them. Once I'm satisfied that an image is sharp, it doesn't bother me if it displays slightly blurry in Fit view, because I know that this is caused by scaling.

Many edits can be done in Fit view (most settings in the Basic tab), but anything detailed – like sharpening, noise reduction, correcting chromatic aberration and moiré – has to be done at 100%.

dj_paige

Legend

Translation to English:

Why is it that once the retouching is finished in the development module, the photo is of lower quality in the library and the same thing once exported?

You have given us no information about what the problem is.

Probably 99.99% of Lightroom Classic users don't think there is a quality problem when using LrC.

EXPLAIN what you are seeing that is lower quality. Also, show us screen captures to illustrate the problem, before and after. Use the "Insert Photos" icon to include screen captures in your message. Do NOT attach files.

A

alainbrown7Author

Participant

I'm not home right now but the issue is the "noise" correction.

all noise and s back in library module

AxelMatt

Community Expert

Please give us more informations like a sreenshot which shows the problem.

Also we need more informations about your system. Please provide a copy of your 'System Info'. This can be get from the LrC Help > System Info menu item. There's a copy button in the System Info dialog. Press this button and paste the info into your next forum post.

My System: Intel i7-8700K - 64GB RAM - NVidia Geforce RTX 3060 - Windows 11 Pro 25H2 -- LR-Classic 15 - Photoshop 27 - Nik Collection 8 - PureRAW 5 - Topaz Photo

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