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Answered

Problem with JPG size when saving from RAW

Forum|Forum|4 years ago
November 9, 2021
5 replies
9306 views

Hello everyone! Wanted to ask for your help/advice. I am having trouble with saving raw to jpg after the latest Photoshop update (23.0/Camera Raw 14.0), MacOS. When I open a Camera Raw file to edit it, it has all the data I expect, and it is the appropriate file size – approx. 44MB. However, after editing and saving it to a 300dpi JPG, the final file size seems far too small now – between 4 – 8.8MB in comparison to 20MB and higher I was getting before. I have saved the files at the highest image options (Maximum 10-12). If the same file is then opened and saved from Photoshop, again in the highest Image Options quality and Format Options as Baseline (Standard), the size is reduced even more down to 500kb – 1MB!

When I try to open, edit and save the same file in latest version of Lightroom, the final size of JPG is almost 23 MB.

I was playing with Camera Raw Preferences and tried several settings there (Adobe Default vs. Camera Settings + checked Override master settings for specific camera) – but the JPG sizes varied only a little (8.2 – 8.8MB) so still very far from “before update” sizes.

I have tried uninstalling latest Photoshop/Camera Raw version and process and save the file from the older version (22.0), but also older version on my Mac is now reducing size in the same way.

I have Installed 23.0 once again, restarted computer – still same results.

I went through “what is new in Photoshop” with the last version but there is no mention about significant change in sizes of saved JPG files. I tried searching discussions on Photoshop Support web but haven’t run into any discussion thread on this topic. So I am officially experiencing desperation level neverending.

Can someone help explain what I am doing wrong. Camera used - Canon R5.

Correct answer Iva5EDB

I don't normally use Camera Raw (I use Lr Classic), so I thought I'd save a jpg from there (same image that I posted above), and see what happened.

The only way I found to save a jpg was by clicking the three dots in the toolbar, choose Save image > Save as Jpg.

I was not offered any options, and the jpg appeared in the same folder as the original.

The file size was 12 MB – quite a bit less than I got when saving from Photoshop at quality 10 – 19 MB. This is about the same difference in file size that you describe.

I guess this is how saving jpgs from Camera Raw works, no options, and a quality setting that seems to be around 8.

But if you open the image in Photoshop, and do a Save As. you'll be able to choose a quality setting, and have larger files.

Conrad, we found out what is causing it:
They have changed the behavior of the fields in the area where you choose the image quality (in the window it is called Quality and it is under the Format section) - so there is a numeric field and Dropdown list. The numeric list is automaticaly populated with the number based on your choice from Dropdown list. And you are choosing:
- Low (1-4)
- Medium (5-7)
- High (8-9)
- Maximum (10 - 12)
In all previous versions of Camera Raw the numeric field was then automatically filled with the highest from the range from the options from Dropdown list. Which means for Low 4, Medium 7, High 9 and Maximum 12. But now it is filled with the lowest number from the range. So for Maximum it is now10 instead of 12 which makes the difference!
So after choosing Maximum from Dropdown list, you need to manually enter the value 12 into the numeric field to get the maximum quality.
It is a bit tricky to find it because of course you notice that there is not Maximum but High so you adjust the value from dropdown list but i was never checking the numeric field which is located before this dropdown list. So i didn't notice that there is different number now.
In Lightroom and Photoshop there is only 1 slider (1 field) to set the quality of the image. The Camera RAw is the only place where you need two fields to set up the desired quality. I even think that this change of behavior was not intentional but it somehow sneaked into the new release since i cannot see any value added with this change (other than causing me great level of frustration).

Rubberlegs

Participating Frequently

Hi, I have been having identical problems and have done exactly the same as you but with nil success. Older photos which I saved as Photoshop jpegs which were about 20mb are now saving as 450kb. I have read everything but to no effect. I tried to have a photo enlarged and printed but the printing business said the resolution was too small and I cannot increase the resolution any more. Very frustrating to say the least.

D Fosse

Community Expert

@Rubberlegs

You're mixing up resolution and file size. Those two are very different things.

The jpeg file format uses very aggressive data compression to reduce file size on disk. It normally shrinks a file down to 1-10 % of native uncompressed size. This has nothing to do with resolution. The size reduction depends on compression level, but notably it also depends on image content, by a factor of up to 10x or more.

The point is that jpeg file size says almost nothing about resolution.

This dramatic size reduction comes at a price. Jpeg compression is destructive, non-reversible and cumulative. A jpeg should be treated as one-off final delivery when bandwidth is a limitation (such as for web).

Rubberlegs

Participating Frequently

Thanks. If you have converted an edited raw photo in Adobe Camera Raw and opened it in Photoshop how do you save it to get the best resolution for printing a large print?

PECourtejoie

Community Expert

Hello, in workflow, is there an image size setting? see https://community.adobe.com/t5/photoshop-ecosystem-discussions/strange-decrease-in-file-size/td-p/12505679

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Iva5EDBAuthor

Inspiring

Here are printscreens of image size info from workflow from both Preferences/Camera Raw/Workflow and Save option while in Camera Raw. I tried different Color Space setting but the size differs only slightly, both far from 23MB. Also i attached print screens with basic info about RAW and JPGs so you can see that when i saved it on Oct 7th I got JPG 23MB and when I opened the same RAW not adding any edits and only saved it now I am getting much smaller JPG.
I was over 3 hours on call with Adobe Photoshop Support yesterday and they actually didn't give me answer if this is ok. And they were definitely not aware of any changes to algorithm. They uninstalled and installed again the whole Photoshop then uninstalled only Camera Raw modules back to 2 versions back and made me try the workflow again, then reinstalled the newest version of Camera Raw again....And after 3 hours they told me they are keeping my case open for further investigation.

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Iva5EDBAuthor

Inspiring

Screen_Shot_2021-11-10_at_7-34-27_AM.png

Per Berntsen

Community Expert

If you're seeing a change in jpg file size from what you're used to (pixel dimensions and jpg quality setting being the same), it is most likely caused by the nature of image content. This has a huge influence on the image size for jpgs.

An image with lots of sharp, busy detail (and/or noise) does not compress well, and will result in a large file.

An image with predominantly flat, smooth, or out of focus areas does compress well, and will result in a small file.

This image was shot with a medium format camera with a very sharp lens, and is sharp from foreground to infinity.

Saved at full size (8256 x 6192 pixels) as a jpg at quality 10 in PS 2022, the file size is 19 MB.

This is the same image, blurred with Lens Blur in Photoshop, then saved as jpg like the first image.

The file size is 3.5 MB.

For the image below I used the Add Noise filter, and the resulting jpg file size is 112 MB.

I'm getting very similar file sizes using Photoshop 2020 and 2021, and also when exporting from Lightroom Classic version 11 at quality 80.

Conrad_C

Community Expert

An idea that comes out of those tests is that maybe the Camera Raw 13 default import/develop settings changed or were not brought forward, so maybe the default settings changed for options that affect detail frequency such as Sharpening, Noise Reduction, and Texture. If images are now being processed with different settings in Camera Raw 14 (intentionally or not), that could affect the default file size when exported to JPEG.

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Iva5EDBAuthor

Inspiring

Thank you, Conrad, for your explanation! I just would like to eliminate possibility that my version of Camera Raw or Photoshop is somehow corrupted/not working correctly. Would you or anybody be so kind and try to open and save my RAW in Photoshop 23.0/ Camera Raw 14.0., without any edits, just save it from Camera Raw and then share what size of JPG you get from your CR. I have attached RAW and also print screens of Image Size settings. Thank you very much in advance!

Leslie Moak Murray

Community Expert

@melissapiccone is correct. Every time you open and re-save a jpeg there will be a loss of data and quality. Try saving as a .tif and working on it in that version. Then at the end, when the image is completely finalized, at that point you can save it as a jpeg.

-edit typo

melissapiccone

Community Expert

What difference does the size make? The whole point of a jpg is reduce the file size so you can use it for the web or share with others. Do you see any difference in quality? JPG is a Lossy format - PS or whatever app you save it out of takes gobs of information and tosses it away. You should not be opening a jpg, editing and saving it as a jpg again - you will now have double losses and compression and it will begin to degrade very quickly - saving it at 10-12 will not help. Literally the only thing that matters is how it looks to you and as far as file sizes go, finding a compromise between size and quality if sharing / posting. As a former web designer, I would be thrilled with the smaller files.

Melissa Piccone | Adobe Trainer | Online Courses Author | Fine Artist

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Iva5EDBAuthor

Inspiring

Thank you, Melissa for your advice. Of course I know that JPG is lossy format, i only use it to give it to clients - the highest quality option of jpg(since i do not share RAWs). I am not new with PS or Photography. I don't edit JPGs. I am only asking what happened if a RAW file edited in October 2021 in CameraRaw 13.1 version before latest update had 24MB when saved and now when i just open the very same RAW in CameraRaw 14.0 (a month later) and save it in the same way, without doing any changes, it only has 8.8MB.

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Iva5EDBAuthor

Inspiring

I just want to know if my installation is corrupted, or my Mac has some issues or if just new CameraRaw version comprimes even more while the setting is still completely same. I find it strange that if i choose the very same setting in Lightroom vs. CameraRaw and vs. Photoshop - i am not getting the same results. Because before last update i hade the same file size for the same RAW regardless where it was saved from. And now I have 23.1MB from Lightroom, 8.8 MB from CameraRaw and 23MB from Photoshop for the same RAW, none edits added anywhere.

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