Tips to get the best out of scanning images:
1.) Capture at the highest quality colour settings offered by the capture device. Capture at the full colour depth offered by the capture device. This should certainly be at least 24bit (8bit per channel), however many scanners now offer the ability to capture at higher colour depths (30-48bit).
This will be slower, uses more memory and will increase storage requirements. However the archive image will then have been stored at the best possible quality from the device allowing re-use with confidence.
These ‘high-bit’ files will provide higher quality images (increased maximum density and shadow detail) which can then be used to down-sample to 24 bit colour images.
Many scanners also offer a choice of quality levels to the user. The ‘High Quality’ scan provides a higher quality by multiple sampling where the scanner effectively scans twice (or more) and then averages the results. This improves the quality but extends the scanning time. It is certainly recommended as long as the project can justify the extra time taken to capture the work.
2.) Capture at the highest resolution necessary for your uses (or larger than your current needs). Operational specifications should be set that quantify the required file sizes and formats for your project. Images must be captured at a resolution that provides files to this size or larger. Remember that capturing at a higher resolution will provide some extra future-proofing at the price of extra archive and storage costs.
3.) Visually check each and every image. Every image should be given a visual check for any obvious faults, re-capturing at time of creation is easier and less time consuming than having to return to the original at a later date.
4.) Once image is captured, save it. Save the image within a ‘standard’ open uncompressed file-format. This is normally TIFF. The image file should be saved with a unique name following a standardised name structure that provides enough information to locate the original image.