GB/Z 26208-2010 Active National standards

GB/Z 26208-2010 Testing of supplementary systems of photometry

Publish Date: 2011-01-14 Implement Date: 2011-06-15 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/Z 26208-2010

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Electric lighting

ICS Name: The measurement of color and light

Publish Date: 2011-01-14

Implement Date: 2011-06-15

Pages: 92 pages

Scope

The luminance defined within the current CIE illumination measurement system is not fully correlated with the perceived brightness of colored objects or light sources. The difference between luminance and perceived brightness itself manifests as an overlapping deficiency problem; the apparent perceived brightness obtained by superimposing two or more monochromatic light sources is often different from the sum of their luminances. In normal vision, the superimposition effect is usually less than the sum of the luminances, and the lack of additivity in this case mainly manifests in subadditivity. Current color theory explains this phenomenon based on the interaction between human cone cells (i.e., the Helmholtz-Kohlrausch effect); saturated colors make a "color contribution" to the physiological perceived brightness signal.