Image Quality Guidelines
There are numerous metrics to describe the different aspects of image quality, but there are only a few standards that rate these metrics. There are only a few guidelines and normes, proposed from different sources and backgrounds. Some guidelines, norms or standards can target one specific subject, like those from the ISO. There are also some all-round guidelines for image quality, like national guidelines as FADGI from the USA or Metamorfoze from the Netherlands. In this article, guidelines and norms will be treated as being standards.
The Federal Agencies Digitization Guidelines Initiative is a collaborative effort by federal agencies to define common guidelines, methods and practices for digitizing historical content. In this context, the term 'FADGI' refers to the Technical Guidelines for Digitizing Cultural Heritage Materials by the still image working group. As a guideline, FADGI assesses image quality by providing 1 to 4 stars for several image quality aspects. Read more on the FADGI on this wiki.
-1:2003 Photography -- Spatial resolution measurements of electronic scanners for photographic images -- Part 1: Scanners for reflective media csnumber=29702. Specifies methods for measuring and reporting the spatial resolution of electronic scanners for continuous tone photographic prints. It is applicable to both monochrome and colour print scanners.
-2:2004 Photography -- Electronic scanners for photographic images - Spatial resolution measurements - Part 2: Film scanners csnumber=35201. Specifies methods for measuring and reporting the spatial resolution of electronic scanners for continuous tone photographic negatives and reversal (e.g. slide) films. It applies to both monochrome and colour film scanners.
:2004 Photography -- Electronic scanners for photographic images -- Dynamic range measurements csnumber=35939. Specifies methods for measuring and reporting the dynamic range of electronic scanners for continuous tone photographic media. It applies to scanners for reflective and to scanners for transmissive media.