This property refers to the brightness value. This is the numerator.
Reference
BrightnessValue0 is the numerator for the brightness value
BrightnessValue1 is the denominator for the brightness value
The brightness value (unit is the APEX value) = BrightnessValue0 / BrightnessValue1
Ordinarily brightness is given in the range from -99.99 to 99.99
*APEX is the Additive System of Photographic Exposure, a standard unit for expressing exposure.
Explanation
The property value can be set or retrieved by executing the FileIO.GetImageFileType or the FileIO.GetImageFileTypeMem methods.
The property value is derived from the image tags related to the picture taking conditions.
Setting this value
This value can be set at runtime.
Retrieving this value
This value can be retrieved at run-time.
[Differences from the ImageKit7 ActiveX]
In the IK7 this was a read only property. It can now be set.