I scan 'em at the highest res possible then downsample them to a reasonable size in PS at 72 dpi. I have had good results saving them as .png 24. I can pan and scan all day long without any pixelation.
A hard and fast rule: YOU CANNOT SCALE AN IMAGE OR VIDEO UP (much) WITHOUT LOSING (perceivable) QUALITY. <
Rats, dude, you've gone and messed up the thread by posting contrary advice that, regardless of how the results worked, is still incorrect.
Your downsample to 72 dpi is pointless. All you needed to do was downsample to a specific size. The dpi means nothing in video. Absolutely nothing. A pixel is a pixel in video, there are no inches, there is no printing head. There are only little points of light called pixels. Standard definition video is only about 500x800 pixels, that's it, there is no way to display any more pixels than that.
If you don't have enough pixels in your scanned image (say, less than 500x800), when you scale the image up by zooming in, the pixels will just get bigger and display the distasteful artifact known as pixelation or blocking. If you have too many pixels in your scan, (say, more than 1500x2400), you hopelessly bog down the system by processing huge amounts of data you not only don't need, you cant see.
Your technique may work for you but you're still approaching the scenario with the wrong paradigm. Video is not printed on paper.
bogiesan
