image file is larger when opened in photoshop

[chinbata8079039]

i have a .jpg image which is 160kb, but when i open it in photoshop>image>image size it says its 4.12M.

and if i save it for web with 60% quality its bigger than the original.How is that possible?

[Per Berntsen]

When you open a jpg, it decompresses, and Photoshop shows you the decompressed size.

Some programs will show you both the decompressed size and the size on disk, but Photoshop doesn't.

So what yo're seeing is perfectly normal.

[chinbata8079039]

So how did it became 2x larger in size when i save for web with only 60%?

[Terri Stevens]

when you open any file in Photoshop the program writes a mass of metadata to the original and that boosts the file size-metadata is not compressed. You'll find if you strip out the metadata the file size will be smaller than the original saved with 100% quality.

[Test Screen Name]

You'll notice you have quality settings when you save Photoshop in smart apps like Photoshop. Experiment and choose wisely: the high quality could easily be 10 or 50 times bigger than the low quality. Only you can know which works for you. Each time a JPEG is saved it loses quality and you can never get it back, so you should keep that to an absolute minimum.

[josephm73863571]

Thank you

[Terri Stevens]

160KB is the size on disk and 4.12MB is the size occupied in memory. Very different things.

[chinbata8079039]

OK, Thanks a lot fellas

[petrh72581859]

OK