Displayed Image Negation
The luminance image has a value of 0 for the brightest pixel and a value of 1023 for the darkest pixel. Luminance
value is an indicator of the time for the pixel to reach a reference voltage. A pixel exposed to a bright light reaches
the reference voltage in a shorter period of time and therefore its value is small. A pixel exposed to a dim light reach-
es the reference voltage in a longer period of time and therefore its value is large.
It is possible to negate the pixel values for displaying. So, a 0 value pixel is displayed bright and a 1023 value pixel is
displayed dark.
The
Image Negation
figures show the effect of negation on an image of a building.
Table 5-2:
Image Negation
Image Without Negation
Image With Negation
Image Histogram
Main Menu under the
Luminance
tab, select the
Hist.
option to display a histogram of the
image.
A histogram is computed and updated for each new image displayed. The histogram is displayed below the image as
shown in the
Histogram Example
figure. The horizontal axis shows the pixel values. The vertical axis shows the
number of pixels with a value.
ADVS200x Luminance Image
5–10
ADIS1700x Vision-Sensing Camera Module User Guide
