| The object of this study is to devise a simple technique to provide digital access to fragile paper-based colour maps and images that might otherwise be damaged by misuse and abusive handling. On the basis of certain physical attributes, five different map and image types are defined. Using low cost equipment and software, seventeen representative maps and images were digitized. The digital files were then compressed, indexed and re-formatted, and a selection of these images were used in a survey of undergraduate students testing the legibility and colour reproduction of the various combinations of digital attributes.; The study suggests that there is a positive relationship between increased scanning resolution and both increased legibility and better colour reproduction. Furthermore, the study concludes that, for certain image types, there is a negative relationship between bit depth and image sharpness. Finally, the study arrives at the determination that every image must be treated individually, and standards for digitization must be customized for every image type. |
