This property refers to the brightness value. This is the denominator.
[Visual Basic] Public ReadOnly Property
BrightnessValue1 As Integer
[C#] public int BrightnessValue1 {get;}
Property Value
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 retrieved by executing the File.GetImageFileType or the File.GetImageFileTypeFromRawData method.
The property value is derived from the image tags related to the picture taking conditions.