A brightness map is a computer graphic display of the brightness values, BVi,j,k, found in digital remote sensor data. Ideally, there is a one-to-one relationship between input brightness values and the resultant intensities of the output brightness values on the display.
For example, an input BV of 0 would result in a very dark (black) intensity on the output brightness map, while a BV of 255 would produce a bright (white) intensity. All brightness values between 0 and 255 would be displayed as a continuum of grays from black to white. In such a system, an input brightness value of 127 would be displayed exactly as 127 (mid-gray) in the output image (assuming contrast stretching does not take place).