RDOC wrote:
What factors does Photoshop use to determine what size the Image will be when it opens a new image. Example if I use an 8MP Camera at a quality setting which produces a resolution of 180 ppi it produces an image size of 18.1” x 13.6” when the image opens in Photoshop. How is this Image size determined by Photoshop?
You’re quite confused. The quality settings of your camera and the resolution in ppi are not related in any way. The quality setting affects the amount of JPEG compression, although you can also often change the output in megapixels. The ppi is just a number which tells the printer how many pixels should be printed on one inch of paper. nothing more, nothing less. You can change it in Photoshop withoutchanging the size in pixels (but changing it will change the size of the print in inches).
Your camera produces an image of 3258 x 2448 pixels and 180 ppi simply means that 180 pixels fit in one inch. Consequently, 3258 pixels fit in 18.1 inch and 2448 pixels fit in 13.6 inch. Photoshop doesn’t ‘determine’ the size, it’s just the result of the number of pixels and the resolution.
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Johan W. Elzenga johan<<at>>johanfoto.nl Editor / Photographer
http://www.johanfoto.com 
