On the Personal IAS, what are the measurement units of graininess and mottle?
Graininess and mottle are computed based on reflectance data. Reflectance data is on a scale from 0% (black or dark) to 100% (white). Since graininess and mottle are standard deviations of reflectance data, they too are in reflectance units. So, for example, a graininess value of 8 indicates a standard deviation value of 8% in reflectance units or 0.08 reflectance units.
Related Questions
- On the Personal IAS, what color filter and density standard should be used when measuring graininess and mottle of different color patches?
- On the Personal IAS, is the graininess and mottle computation according to the ISO-13660 standard and methodology?
- On the Personal IAS, how are graininess and mottle computed? What is the methodology employed?
