Graphics Programs Reference
In-Depth Information
The position and shape of the swatches have no effect on the
Histogram
. The
Histogram
only records the quantity of data points for each shade of gray.
If we modify the swatches with different shades of gray, we get the
Histogram
in the next
image. In this image, the vertical lines vary in height, because the total area for each shade
of gray varied. I have placed my cursor on the tallest vertical line. My cursor is high-
lighted in yellow. I have also drawn a yellow box around some of the data associated with
this bar of the
Histogram
. It tells us that the dominate shade of gray is bar 112 and that
there are 278,400 data points in the image that are that exact shade of gray. We can, like-
wise, analyze any other bar in the Histogram.