You get a bonus - 1 coin for daily activity. Now you have 1 coin

3.4. COLORIMETRY

Lecture



Colorimetry is the science of measuring colors. For the measurement of colors using different coordinate systems.

From the eighth axiom of Grassmann it follows that the color   3.4.  COLORIMETRY can be equalized with a mixture of three primary colors   3.4.  COLORIMETRY ,   3.4.  COLORIMETRY and   3.4.  COLORIMETRY i.e.

  3.4.  COLORIMETRY , (3.4.1)

Where   3.4.  COLORIMETRY ,   3.4.  COLORIMETRY ,   3.4.  COLORIMETRY - equalizing color values   3.4.  COLORIMETRY . Since the intensities of incoherent light sources add up linearly, the spectral density of the mixture is equal to the sum of the spectral densities of its components. According to (3.4.1), the spectral density   3.4.  COLORIMETRY can be replaced by the equivalent spectral density of the mixture of primary colors, i.e.

  3.4.  COLORIMETRY , (3.4.2)

Where   3.4.  COLORIMETRY primary spectral density   3.4.  COLORIMETRY . The relation (3.4.2) has a simple meaning: spectral densities connected by an equivalence operator   3.4.  COLORIMETRY cause the same color sensation. Vocalorimetry uses color coordinates that are equal to

  3.4.  COLORIMETRY , (3.4.3)

Where   3.4.  COLORIMETRY equalizing the value of the reference white. Substituting expression (3.4.3) into (3.4.2), we obtain

  3.4.  COLORIMETRY . (3.4.4)

From the fourth axiom of Grassmann it follows that the brightness of the color   3.4.  COLORIMETRY equal to the sum of the brightness of its main components. Consequently,

  3.4.  COLORIMETRY , (3.4.5a)

  3.4.  COLORIMETRY , (3.4.5b)

Where   3.4.  COLORIMETRY - relative luminous efficiency. Relations (3.4.4) and (3.4.5) are the quantitative basis of colorimetry.


Comments


To leave a comment
If you have any suggestion, idea, thanks or comment, feel free to write. We really value feedback and are glad to hear your opinion.
To reply

Digital image processing

Terms: Digital image processing