Photometry can refer to: *

Photometry (optics) Photometry is the science of the measurement of light, in terms of its perceived brightness to the human eye. It is distinct from radiometry, which is the science of measurement of radiant energy (including light) in terms of absolute power. I ...

, the science of measurement of visible light in terms of its perceived brightness to human vision *

Photometry (astronomy) Photometry, from Greek '' photo-'' ("light") and '' -metry'' ("measure"), is a technique used in astronomy that is concerned with measuring the flux or intensity of light radiated by astronomical objects. This light is measured through a telescop ...

, the measurement of the flux or intensity of an astronomical object's electromagnetic radiation *

Spectrophotometry Spectrophotometry is a branch of electromagnetic spectroscopy concerned with the quantitative measurement of the reflection or transmission properties of a material as a function of wavelength. Spectrophotometry uses photometers, known as spec ...

, the measurement of spectral distribution along with the flux or intensity * A

photometric study Architectural lighting design is a field of work or study that is concerned with the design of lighting systems within the built environment, both interior and exterior. It can include manipulation and design of both daylight and electric ...

, sometimes also referred to as a lighting "layout" or "point by point" *

Photometric stereo Photometric stereo is a technique in computer vision for estimating the surface normals of objects by observing that object under different lighting conditions. It is based on the fact that the amount of light reflected by a surface is dependent ...

, a computer vision technique for estimating 3D shape from one or more images.

See also