What is the difference between luminance and brightness?

Definitions

- Describing the amount of light emitted by a surface or object. - Referring to the brightness of an image or display. - Talking about the intensity of light in a particular area or scene.

- Describing the amount of light present in a particular area or scene. - Referring to the intensity of light emitted by a source. - Talking about the level of illumination in a room or space.

List of Similarities

  • 1Both luminance and brightness refer to the amount or intensity of light.
  • 2Both can be measured using scientific instruments.
  • 3Both are important factors in photography and image processing.
  • 4Both can affect the perceived color of an object or scene.
  • 5Both can be adjusted or controlled to achieve a desired effect.

What is the difference?

  • 1Definition: Luminance specifically refers to the amount of light emitted or reflected by a surface or object, while brightness is a more general term that can describe the level of illumination in a space or the intensity of light emitted by a source.
  • 2Units of measurement: Luminance is typically measured in candelas per square meter (cd/m²), while brightness can be measured in various units, such as lumens or foot-candles.
  • 3Application: Luminance is often used in scientific or technical contexts, such as in the study of optics or color science, while brightness is a more common term used in everyday language.
  • 4Perception: Luminance is related to the physical properties of light, while brightness is more subjective and can vary depending on individual perception.
  • 5Context: Luminance is often used in the context of displays, screens, or images, while brightness can refer to a wider range of situations, such as lighting in a room or the brightness of a star in the sky.
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Remember this!

Luminance and brightness are both terms used to describe the amount or intensity of light. However, luminance is a more specific term that refers to the amount of light emitted or reflected by a surface or object, while brightness is a more general term that can describe the level of illumination in a space or the intensity of light emitted by a source. Luminance is often used in scientific or technical contexts, while brightness is a more common term used in everyday language.

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