>We're playing with a slide scanner, scanning color slides at 2400 DPI.
They are not grainy; there's no "grain" in a continuous-tone digital image.
They're pixelated. They look pixelsated in iPhoto because a 2400 pixel per inch
scan is huge, and iPhoto is scaling the picture down to fit on your computer
screen. Programs like GraphicConverter use a sophisticated algorithm to scale
pictures down to fit on your monitor. iPhoto uses a less sophisticated
technique; the result is that the scaled-down image looks pixelated.
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