Transferred use of the surname of English and Scandinavian origin which is derived from the Old English pipere (pÃ­pere, piper one who plays the) pipe and The Old norse (pipari, pÃ­pari piper one who plays). the pipe
Colorimetry is the analysis of chemical samples to collect information about their concentration.It involves passing light through a sample and measuring how much is absorbed by the solution, using equipment like a spectrophotometer to measure as precisely as possible. spectrophotometer may be used during colorimetry. The therm colorimetry may be used to describe the study of how people perceive color and distinguish between colors. Colorimetry can be used to help people with colorblindness.
Michelson contrast (also known as the visibility) is commonly used for patterns where both bright and dark features are equivalent and take up similar fractions of the area (e.g. sine-wave gratings).The Michelson contrast is defined as.ontrast sensitivity is a measure of the ability to discern between luminances of different levels in a static image. Contrast sensitivity varies between individuals, reaching a maximum at approximately 20 years of age, and at angular frequencies of about 2â5 cycles per degree.