Still Specs for Scanning Images to use in Video Editing
– Scan as close to 4000 pixels in either direction, without going over. For example, if you scan an 8.5” x 11” sheet of paper, it should be about 2909w x 4000h in total pixel count. This would be a dpi of about 363
– Avid and Final Cut Pro both have difficulty working with image sizes larger than 4000 pixels in any direction. 
– One dpi setting will not be useful for all scanned images. Please adjust your dpi so that is as close to 4000 pixels in either direction without going over. 
 – All images must be saved in RGB, not grayscale, CMYK or any color space other than RGB. Most systems will not be able to work with anything other than RGB color space. 
– File format should be either .tiff (TIFF) or .tga (Targa). 
– Tiff’s should be saved as 8bit, uncompressed, in Mac byte order. 
– Targas should be saved 32bit, uncompressed. 

This will produce and image file that can be used in SD or HD and be enlarged as much as 208% for HD and 555% for SD with out degradation. Also it will offer a format that is useful in, Final Cut Pro After Effects, Avid and a bunch of other software.