Is there any way of getting at the Scene Luminance number available in the miscellaneous params directly from a Basic or Lua script?
Also does anyone know how the Bv96 number is derived? Are the Bv96 and scene luminance numbers independently presented by the camera or is some calculation being done by chdk using an assumed reflected light calibration constant?
I know I should be able to derive the luminance from the Bv96 value but being able to access directly from Basic or Lua would be easier.
A pointer to the relevant source code would be good.