On the Personal IAS, what color filter and density standard should be used when measuring graininess and mottle of different color patches?
For most applications, the gray color filter is recommended. Research has shown that humans are more sensitive to spatial variations in lightness and darkness than to spatial variations in color. In other words, humans are more sensitive to variations in L* than in a* or b*, if you think in these terms. With the Personal IAS, you can approximate this by selecting the “gray” color filter that forces the Personal IAS to use the “Visual Density” standard. This filter is a fairly broadband color filter centered on the green colors. This is where the human eye is most sensitive to spatial variations. Under certain circumstances, you may find that a specific color filter produces more sensitivity to the non-uniformity of concern. If you are not satisfied with the gray filter, experiment to determine the filter that works best for your application.
Related Questions
- Can alternate boot colors be ordered complying with standard color coding used for electrical, waste water, water, gas, steam, and etc.?
- On the Personal IAS, is the graininess and mottle computation according to the ISO-13660 standard and methodology?
- On the Personal IAS, what are the measurement units of graininess and mottle?
