Photoshop: An editable 'file size' field in image size.

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I often work with large files that I sent to my clients for screen approval.

As a general rule, I find about 30-40mb file size in image size allows me to save a JPG (quality 8) file around 1mb. Perfect for a quick email but still showing reasonable quality and detail for a screen approval before sending on the high res.

In this case, as long as my proportions are correct, I don't care about the Resolution field and pixel dimensions. I just want say 35mb.

If there was a file size field, I could select it, hit 35 and bang - I've got a 35mb file.

It would be one of those great little time savers.

And then it would be actionable. I could save a whole folder with various dimension files at a similar size.
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Mark Sterne

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Posted 4 years ago

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Chris Cox

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Unfortunately just specifying the target image memory usage is an underdetermined system -- you would have to have the physical size or resolution (but not both!) fixed in order to actually figure out how to resize the image to achieve a certain image size.

But, file size and image size are not the same thing - because file sizes include some file format overhead, metadata, and the image data compression.
So a 35 MB image may end up a 2 MB file, or a 90 MB file depending on the file format and options chosen. So you can't determine the file size at all in the image size dialog.
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Mark Sterne

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Hi Chris,

Thanks for your input!

I understand and are aware of what you are saying. And realise this would break the interface logic in image size with having to fix the physical size or resolution.

I do find that in 95% of the images I work on, 35mb saved as 8 quality JPG gives me something I can email. Even if I do this to a document which is pure noise on a gradient I get a file under 10mb - still emailable.

I really find the physical size and resolution to be irrelevant when I'm doing this.

Perhaps Adobe could look at scripting something like this?

Would be very handy.
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Chris Cox

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That could already be scripted in a few minutes -- just enter an upper limit for the data size, and calculate the size of the image in pixels that would give that data size (while preserving the aspect ratio as closely as possible).
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Mark Sterne

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Hi Chris,

I'm a script novice. Do you think one of the Pros at Adobe could create a script that does this?

It would be of huge use to myself and other professionals in my industry.

Thanks