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Photoshop and LightRoom reducing image quality after JPG export

Forum|Forum|6 years ago
November 14, 2019
3 Antworten
1860 Ansichten

Photos become darken and less contrast after exported to JPG from both PS and LR (previous and the latest version also). I am using Windows 10.

Import and export

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Beste Antwort von D Fosse

It's a common misunderstanding in these cases that the file somehow "changes". It doesn't.

The question is whether you are viewing the file in an application that supports icc profiles and color management at all. Many don't, and Windows "Photos" is one of them. iPads aren't color managed under any circumstance. All bets are off here

A properly color managed application like Lightroom or Photoshop will always display the file correctly - provided that you have a valid and healthy monitor profile. That's essential, and this is why people use calibrators. If you don't have a calibrator, this can be a problem. Display and laptop manufacturers distribute their own generic monitor profiles through Windows Update - and these profiles are surprisingly often of poor quality or defective. A non-color managed application doesn't use the monitor profile and will be unaffected.

To test whether your monitor profile is basically sound, try to replace it with sRGB IEC61966-2.1. That won't be entirely accurate, but it shouldn't be dramatically off. Relaunch Photoshop when done, it needs to load the profile at startup.

Per Berntsen

Community Expert

The Photos app is not color managed, and can not be expected to display correct colors.

Chrome and Opera are both color managed, and should display identically to LR and PS.

If they don't, it's most likely caused by a defective monitor profile.

So follow the advice given by D_Fosse above, and set the monitor profile to sRGB.

Color managed applications (LR. PS, Chrome, Opera) must be relaunched to become aware of the new profile.

nigelj89921973

Known Participant

Thank you! It works! I admit I was wrong 🙂

D Fosse

Antwort

Community Expert

It's a common misunderstanding in these cases that the file somehow "changes". It doesn't.

The question is whether you are viewing the file in an application that supports icc profiles and color management at all. Many don't, and Windows "Photos" is one of them. iPads aren't color managed under any circumstance. All bets are off here

A properly color managed application like Lightroom or Photoshop will always display the file correctly - provided that you have a valid and healthy monitor profile. That's essential, and this is why people use calibrators. If you don't have a calibrator, this can be a problem. Display and laptop manufacturers distribute their own generic monitor profiles through Windows Update - and these profiles are surprisingly often of poor quality or defective. A non-color managed application doesn't use the monitor profile and will be unaffected.

To test whether your monitor profile is basically sound, try to replace it with sRGB IEC61966-2.1. That won't be entirely accurate, but it shouldn't be dramatically off. Relaunch Photoshop when done, it needs to load the profile at startup.

nigelj89921973

Known Participant

Sorry, but that problem is not about monitor calibration. May be about applications calibration but it doesn't matter. I'm facing it all the time too and don't know what to do with it. The situation: in PS/LR I do some photo, adjust colour, contrast, details in shadows etc. Then export to JPG or PNG. And at Windows Photo or in browsers (Chrome, Opera... doesn't matter), in socials (FB, IG) photo looks darker, details in shadows drawn in black and common imagination from the photo breaks down. But. If we open that JPG/PNG in PS/LR again - it's ok, all colours are the same as in PSD. But in browsers - it's still dark and terrible.

So, the main question: what I should do to display my photo correctly after publication on the Internet? Make it lighter with adjustments before exporting? ))))

D Fosse

Community Expert

"photo looks darker, details in shadows drawn in black"

This is quite normal when you are viewing in software without color management. It's a common question that I've explained here previously several times.

The reason for this is that LCD displays have a native dip in the tone response curve in the deep shadows. This compresses and "crushes" the shadows and you lose shadow separation on screen. If the image is predominantly dark, the effect can be quite dramatic.

The monitor profile maps the display's tone response curve along with the rest. If the application is color managed, it then corrects for this dip, using the monitor profile to do so. The data sent out to screen have a corresponding lift to compensate - with the net result linear, so that the file is correctly represented on screen.

In short, color management isn't just about color. The monitor profile is a complete map of the display's response, in full detail, and all of this is corrected by the application as it sends the data to screen (if it is color managed). The profile has a much higher precision level, using many more parameters, than the simple calibration that is performed in the video card.

This is why color managed and non-color managed software will never match. One is right; the other is wrong.

To understand the difference between calibration and monitor profile, and how they work together, think of it this way: the monitor profile is a detailed description of the monitor's behavior in its calibrated state.

Theresa J

Community Expert

How are you viewing the jpegs and are you embedding an icc profile?

C

carolr78921510Autor

Participant

Hi Theresa,

I have tried the following method to export the dng file to jpg format:

Export As: JPG Format, Quality: 100%, Image Size and Scale: No change, Resample: Bicubic Automatic, Metadata: None, Color Space: Covert to sRGB and Embed Color Profile.

I am not sure about Adobe RGB and sRGB setting for my camera and PS / LR file. I am using a 100% sRGB monitor to do photo editing. My camera setting is Adobe RGB, import RAW files to PS / LR in Adobe RGB, and export as per my above setting. I will export the photos to my iPad, and upload to my FB. The color of my iPAD looks saturation and contrast are reduced in iPAD. Even though I use Windows Viewer to view my jpg photos is also darken and less contrast.

Could you suggest is my camera and PS/LR setting correct?

The brightness of my screen is about 20% for photo editing, is it correct, or a little bit darker? It is because my photo in jpg looks a bit darker.

Thanks

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