PSYC 380 Lecture 5: Colourimetry

• School: Queen's University
• Department: Psychology
• Course: PSYC 380
• Professor: Niko Troje

Document Summary

Spectral power distribution, colour matching functions, tristimulus values, spectral locus, cie chromaticity diagram, other colour spaces, linear and non-linear transformations, radiometric vs photometric quantities. Inradiometry, photometry and colour science, a spectral power distribution measurement describes the power per unit area per unit wavelength of an illumination. More generally, spectral power distribution refers to the concentration, as a function of wavelength, of any radiometric or photometric quantity (ie. radiant energy, radiant flux, radiant intensity, radiance, irradiance, luminance, luminous flux, luminous intensity, illuminance) Radiometry- the science of measuring light in any portion of the electromagnetic spectrum. Irradiance- the intensity of light measured in watts per square meter (w/m2) Photometry- the science of measuring visible light in units weighted according to the sensitivity of human eye: photometric equivalent if radiance is illuminance measured in lumens per square meter (lux) Power = the amount of energy being emitted in a given wavelength.