Participating Frequently

Question

PS resizes photos but I don't want it to

Forum|Forum|7 years ago
July 26, 2018
4 replies
477 views

Hello all, I am using "process multiple files" to rename photos by adding a date to each name. I have NOT put a check mark in the box to resize the photos. However, PS is resizing them anyway - by 90%!! How do I prevent this from happening? Thank you.

This topic has been closed for replies.

C

ColoradoCatLadyAuthor

Participating Frequently

OK, folks, I think I resolved the problem. Within the "Process Multiple Files" command box, there's an option to check off "JPEG Max Quality." That box was not checked. Once I checked it, the files did not lose any megabytes.

Although it appears that I've answered my own question, I'm posting the answer here in case others encounter this same issue.

And if my answer is incorrect, please say so. But the answers above don't make sense because the problem occurs only when I use the "Process Multiple Files" function, not when I make other changes to the photos.

Thanks for offering advice and help!

ceyhun_akgun

Legend

There may be a lot of information on the first photo and it may be hidden inside. The JPEG file compresses each time by discarding hard-to-find information in color information. If you plan to use JPEG, the compression value should always be a maximum of 12.

Graphic Designer Educator / PrePress Consultant

C

ColoradoCatLadyAuthor

Participating Frequently

Thank you, ceyhun_akgun, how does one change the compression value to a maximum of 12?

D FossePhotoshop is reducing the file size, not JPG; if I just save the file without renaming it through batch processing, it saves at the same size.

But is what you're telling me that the photo resolution isn't changing even though the MB's are reduced?

(Amateur here.)

D Fosse

Community Expert

That's right, the resolution stays the same, but the data are compressed so it takes up less space on disk. The file isn't a jpeg until it's saved to disk, then it stops being a jpeg when it's opened and decoded again. The problem is that this compression permanently alters the data. Not much, but do it a number of times and it starts degrading the file. Ideally you should only save out to jpeg once at the very end.

Jpeg compression is extremely effective, which is why the jpeg format has survived to this day. But it has a price.

D Fosse

Community Expert

Jpeg uses destructive and irreversible data compression to reduce file size. This can reduce file size down to 2-10 % of original size. Don't use jpeg as a working format, it's only for final delivery.

Jeff Arola

Community Expert

Is photoshop elements resizing the Pixel Dimensions (example 1920 px x 1200 px) or the size shown

in finder/explorer (example 3.8 mb)?

What file format are the photos being saved as?

C

ColoradoCatLadyAuthor

Participating Frequently

That's a good question. I checked, and the dimensions aren't changing, only the size. For example, a photo that was 4000 x 6000 and 4.92 MB is now 4000 x 6000 and 444 kb after being renamed.

My files are JPG.

Thanks for answering and asking!

Jeff Arola

Community Expert

What version of photoshop elements and operating system are you using?

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