Determining scan resolution

Before scanning an image, you need to make some decisions:

ii How you want to use the image i What its final size will be i What resolution you need

By determining how many pixels you need beforehand, you eliminate the need to resize the image in Photoshop (and the resulting image degradation). Many scanner interface windows let you input the final size and resolution you need right in the scan window. If you find the need to calculate scan resolution manually, here's how:

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