OCR of pictures is even more useless in that you will get gibberish instead of your picture when restoring. So it becomes important that you pick your scanner based upon its intended use. Some of the problems with OCR software and scanners can be resolved with higher optical resolution. Scanners are rated with optical resolution, which is the actual resolution of the scanner, and with their digitally enhanced resolution. Optical resolution should be the measure of the machine when comparing prices not the digitally enhanced resolution, which is called interpolated resolution.
Interpolated resolution is where the image is enhanced by the software that comes with the scanner.
The image is enhanced with a software algorithm. Images appear as if scanned at a higher resolution. Interpolated resolutions are often significantly higher than optical resolutions. Both the optical and the interpolated resolutions are given in dots per inch or dpi. You need to find out if the 2400 dpi resolution shown on the box is optical or interpolated before comparing prices.