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euppi98
euppi98
Participant
May 12, 2018
Answered

How not to compress the image?

  • May 12, 2018
  • 1 reply
  • 1212 views

Hello, I have a rather unusual question. How not to compress the image, when using jpeg (jpg) format? For example: there is an image with the resolution of 6000x40000 300DPI, in Photoshop size 68.7 MB, with compression 13.1 MB. Is it possible to not compress the whole image in Photoshop? If not, is it possible to decode the jpeg format to increase the image size? Or native to raise the size of the image?

This topic has been closed for replies.
Correct answer Per Berntsen

Minimum picture size of 26 MB (3700 x 2460 pixels at 300 dpi and 8 bit depth) once decompressed / opened.

When a jpg is opened, it is decompressed, so your compressed 13.1 mb jpg will be 68.7 mb when opened.

So it's nothing to worry about.

1 reply

Per Berntsen
Community Expert
Per BerntsenCommunity Expert
Community Expert
May 12, 2018

The whole point of the jpg format is to reduce the file size, so compression is unavoidable, even at the highest quality.

If you don't want compression, you'll have to use Tiff or PSD.

euppi98
euppi98Author
Participant
May 12, 2018

I understand it. I try to lay out photos on photo stock, there is a very strange condition. Enclosed below:

● Minimum picture size of 26 MB (3700 x 2460 pixels at 300 dpi and 8 bit depth)

once decompressed / opened. (As a guide, a 26 MB file with the ratio 3:2 from a

SLR is approximately 3700 x 2460 pixels)

● Ideal picture size of 50 MB (5150 x 3450 pixels at 300 dpi and 8 bit depth) once

decompressed / opened.

(This is the highest resolution available on our platform. As a guide, 50 MB in the

ratio 3:2 from a SLR is approximately 5150 x 3450 pixels.)

● Maximum file size of 150 MB

● RGB mode (8 bits)

● Color Space: Adobe RGB 1998

● JPG compressed with “quality 12” (minimum quality 10) in Adobe Photoshop.

How is it even possible to have a photograph of 3700 x 2460 pixels with a size of 26 MB? I have 12000x8000px the image has a size of 20MB maximum!

Per Berntsen
Community Expert
Per BerntsenCommunity ExpertCorrect answer
Community Expert
May 12, 2018

Minimum picture size of 26 MB (3700 x 2460 pixels at 300 dpi and 8 bit depth) once decompressed / opened.

When a jpg is opened, it is decompressed, so your compressed 13.1 mb jpg will be 68.7 mb when opened.

So it's nothing to worry about.

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