| VIDEO-IN | and VIDEO-OUT | QUANTITIES | | |
| Item No. | Name | Symbol | Definition | Remarks |
| 14-7.1 | luminous flux fr flux (m) lumineux | Φ, (Φe) | See ISO 80000-7, item 7-30 | |
| 14-7.2 | radiant flux, radiant power fr flux (m) énergétique | P | See ISO 80000-7, item 7-11 | |
| 14-7.3 | irradiance fr éclairement (m) énergétique | E,(Ee) | See ISO 80000-7, item 7-17 | |
| 14-7.4 | radiant intensity fr intensité (f)énergétique | I, (Ie) | See ISO 80000-7, item 7-12 | |
| 14-7.5 | radiant exitance fr exitance (f) énergétique | M, (Me) | See ISO 80000-7, item 7-16 | Formerly called radiant emittance. |
| 14-7.6 | luminous exitance fr exitance (f) lumineuse | M,(Mv) | See ISO 80000-7, item 7-38 | Formerly called luminous emittance. |
| 14-7.7 | radiance fr radiance (f) | L,(Le) | See ISO 80000-7, item 7-13 | |
| 14-7.8 | spectral emissivity fr émissivité (f) spectrale | ε(λ) | See ISO 80000-7, item 7-19.1 and its Remark | |
| 14-7.9 | spectral transmittance fr facteur (m) de transmission, transmittance (f) | τ(λ) | See ISO 80000-7, item 7-20.3 and its Remark | |
| 14-7.10 | spectral reflectance frréflectance(f) spectrale | ρ(λ) | See ISO 80000-7, item 7-20.2 and its Remark | |
| 14-7.11 | illuminance fr éclairement (m) | E,(Ev) | See ISO 80000-7, item 7-34 | |
| 14-7.12 | luminance fr luminance (f) | L,(Lv) | See ISO 80000-7, item 7-35 | |
| 14-7.13 | luminous efficiency fr efficacité (f) lumineuse relative | V | See ISO 80000-7, item 7-28 | |
| 14-7.14 | photo threshold of awareness function fr seuil (m) de la fonction d'attention la lumière | | the ability of the human eye to detect a light that results in a 1° radial angle at the eye with a given duration (temporal summation) | Scotopic and photopic modes of vision are shown in Figure 5. |
| 14-7.15 | temporal summation function fr fonction (f) de sommation temporelle | | the ability of the human eye to produce a composite signal from the signals coming into an eye during a short time interval | Detectability is directly proportional to duration (temporal summation) of the number of light units (photons) received, up to a duration of 60 to 70 ms (Bloch law). Beyond 70 ms the time of exposure is irrelevant. See Figures 6 and 7. |
| 14-7.16 | spatial summation function fr fonction (f) de sommation spatiale | | the ability to produce a composite signal from the signals coming into eyes from different directions | The rate of photon emission per unit area (spatial summation) at a given stimulus duration is dependent upon the size of the stimulated area (Ricco Law). See Figure 8. Up to 100 sr, there is a direct proportionality between photon emission and spatial integration. Beyond this area the ratio obeys Piper Law, which states that the luminance is inversely proportional to the square root of the stimulus area. |
| 14-7.17 | adaptation fr adaptation (f) | | recovery of visual ability following exposure to light (dark adaptation) | This follows a lawful progression up to about 35 min in the dark. The change in the ability of the eye to adapt to darkness following exposure to light covers an intensity range of 10^10:1. |
| 14-7.18 | vision thresholds fr seuils (m) de la vision | Ŧv | thresholds of sensitivity of the eye | See Figures 5, 6 and 7. |
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