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Paulpp
30th November 2007, 02:22 PM
For those of us (I am assuming there is at least one more than me?) what is the best way of resizing an image to get it to the 512kb limit? In particular is there a direct relationship between the file size shown in Elements and what the file size will be when it is saved as a jpg?

Ian
30th November 2007, 02:31 PM
For those of us (I am assuming there is at least one more than me?) what is the best way of resizing an image to get it to the 512kb limit? In particular is there a direct relationship between the file size shown in Elements and what the file size will be when it is saved as a jpg?

Yes - sorry, this can be a very confusing issue!

Usually, an 800 pixel wide image saved as JPEG (don't use Save for Web as this strips out the exif data) will save to a size of around 200K, depending on the complexity of the image - the more complex and detailed, the less compressed it can be.

The image data size you may be seeing in Photoshop edit mode indicates the uncompressed size of the image (each pixel is 3 bytes (3 sets of 8 bits of colour data - RGB), so an 800x600 image may add up to 1.4MB, but JPEG compressed it becomes 200K.

Does that help?

Ian

Paulpp
30th November 2007, 03:54 PM
Thanks, so do I take it that a 800 pixel wide image will display ok, or is it better to go for 1600 wide which I presume would give around 400K?

Ian
30th November 2007, 04:16 PM
Thanks, so do I take it that a 800 pixel wide image will display ok, or is it better to go for 1600 wide which I presume would give around 400K?

800 pixels wide is a good size for on-screen viewing. Or 700 pixels tall.

Ian

shenstone
30th November 2007, 08:31 PM
Thanks, so do I take it that a 800 pixel wide image will display ok, or is it better to go for 1600 wide which I presume would give around 400K?

800 has other advantages on the web - most people are still using monitors that are not natively as wide as 1600 pixels and therefore you will be presenting either an image in that has been adjusted for viewing by the browser software that the user is using which is always less precise than you can be in your original photo editing tool