Photometry can refer to:

  • Photometry (optics), the science of measurement of visible light in terms of its perceived brightness to human vision
  • Photometry (astronomy), the measurement of the flux or intensity of an astronomical object's electromagnetic radiation
  • Spectrophotometry, the measurement of spectral distribution along with the flux or intensity
  • A photometric study, sometimes also referred to as a lighting "layout" or "point by point"
  • Photometric stereo, a computer vision technique for estimating 3D shape from one or more images.

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