Heavens! Pixels are what a digital image is composed of.
by Kiddpeat - 5/29/06 9:31 PM
In Reply to: Resize by taboma
If you throw them away, you are losing part of the image. Without resampling, changing an image's size merely changes the number of pixels displayed in an inch or centimeter or whatever unit of measure you use. I hope you're not taking an image which is 1,540 pixels wide (22 x 70ppi) and saving it with a width of 700 pixels (10 x 70ppi). If you are, you are throwing away more than half of your image data. What usually happens is that you keep the 1,540 pixels, but display them in 10 inches (154ppi) rather than 22 (70ppi).
However, if you are really sure that you never want to see anything more than 70ppi with a width of 7 inches, then you should resample the image. The result will be a width of 490 pixels.
BTW, I know dpi is bandied about the internet as synonymous with ppi. It really isn't. Most usage of dpi applies to inkjets these days, and it means dots per inch. That's not the same thing as pixels per inch. My printer's lowest setting is 720dpi, and its highest is 2880dpi. That does NOT mean I need images with 2880 ppi.
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