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  2. Photometry (optics) - Wikipedia

    en.wikipedia.org/wiki/Photometry_(optics)

    Luminous intensity (photometric) and radiant intensity (radiometric) In photometric quantities every wavelength is weighted according to how sensitive the human eye is to it, while radiometric quantities use unweighted absolute power. For example, the eye responds much more strongly to green light than to red, so a green source will have ...

  3. Radiometry - Wikipedia

    en.wikipedia.org/wiki/Radiometry

    Comparison of photometric and radiometric quantities. Radiometry is a set of techniques for measuring electromagnetic radiation, including visible light.Radiometric techniques in optics characterize the distribution of the radiation's power in space, as opposed to photometric techniques, which characterize the light's interaction with the human eye.

  4. Comparison of photogrammetry software - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_photogramme...

    Yes, Free Edition [2] and Free Trial [3] Ames Stereo Pipeline: Apache v2: Linux and OSX: Standalone Yes Yes, can run on a cluster in parallel Satellite, aerial, close-range Images NASA: No IMAGINE Photogrammetry: Proprietary: Microsoft Windows: Standalone Semi-automatic Yes, multiple images Aerial, satellite, UAS Images 2009 Hexagon Geospatial ...

  5. Spectral power distribution - Wikipedia

    en.wikipedia.org/wiki/Spectral_power_distribution

    Mathematically, for the spectral power distribution of a radiant exitance or irradiance one may write: =where M(λ) is the spectral irradiance (or exitance) of the light (SI units: W/m 2 = kg·m −1 ·s −3); Φ is the radiant flux of the source (SI unit: watt, W); A is the area over which the radiant flux is integrated (SI unit: square meter, m 2); and λ is the wavelength (SI unit: meter, m).

  6. Category:Units of photometry - Wikipedia

    en.wikipedia.org/wiki/Category:Units_of_photometry

    cd/m 2 (= lm/(sr⋅m 2)) L −2 ⋅J: Luminous flux per unit solid angle per unit projected source area. The candela per square metre is sometimes called the nit. Illuminance: E v: lux (= lumen per square metre) lx (= lm/m 2) L −2 ⋅J: Luminous flux incident on a surface Luminous exitance, luminous emittance M v: lumen per square metre lm/m ...

  7. ISO/IEC 29119 - Wikipedia

    en.wikipedia.org/wiki/ISO/IEC_29119

    ISO/IEC/IEEE 29119 Software and systems engineering -- Software testing [1] is a series of five international standards for software testing.First developed in 2007 [2] and released in 2013, the standard "defines vocabulary, processes, documentation, techniques, and a process assessment model for testing that can be used within any software development lifecycle."

  8. Spectroradiometry for Earth and planetary remote sensing

    en.wikipedia.org/wiki/Spectroradiometry_for...

    A sensor with high radiometric resolution can detect and discriminate subtle variations in brightness and radiation magnitudes. [1] In the context of multispectral imaging, the greater the number of data bits per pixel (bit depth) of the image recorded, the better the quality and interpretability of the image, thus the finer the radiometric ...

  9. Photometric system - Wikipedia

    en.wikipedia.org/wiki/Photometric_system

    For each photometric system a set of primary standard stars is provided. A commonly adopted standardized photometric system is the Johnson-Morgan or UBV photometric system (1953). At present, there are more than 200 photometric systems. [citation needed] Photometric systems are usually characterized according to the widths of their passbands: