Photometric stereo, a computer vision technique also known as "shape from shading"
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Spectrophotometry, the measurement of spectral distribution along with the flux or intensity
In 1894 he proposed the lumen and other new measurement units for use in photometry, based on the metre and the Violle candle.
In astrophysics, a BzK galaxy is a galaxy that has been selected as star-forming or passive based on its photometry in the B, z, and K photometric bands.
Evans left England in 1946 to work at the Radcliffe Observatory, Pretoria, South Africa when positional determinations and photometry were the main interests of the astronomical world, but when he left some twenty years later, the South African observatories had become active in astrophysics.
Observers at Kyoto University carried out V band CCD photometry with the 60 cm reflector and detected superhumps of 0.1 mag amplitude, thus reclassifying DM Lyrae as an SU UMa star.
During the fall of 1911, he began a collaboration and friendship with the University of Illinois Observatory director Joel Stebbins that would revolutionize astronomical photometry.