describe the relationship between exposure and output image lightness in digital cameras. Prior to ISO, the most common systems were ASA in the U.S. and DIN
conversion from spectral radiance to luminance is standardized by the CIE and ISO. Brightness is the term for the subjective impression of the objective luminance
Alexander Stepanov presented a library based on generic programming to the ANSI/ISO committee for C++ standardization. The committee's response was overwhelmingly