The node M[N.sub.1] ([x.sub.m], [y.sub.m]) in the shadow region
has communication range with radius [r.sub.0].
The reason for this phenomenon is that the border of the shadow region
had a gradient of intensity.
In the shadow region
, due to the diffraction rays at the shadow boundary lines, the creeping ray fields occur.
This is because most deep-sky objects are much fainter than starlight, so they get recorded at the shadow region
of the histogram.
[[mu].sup.R.sub.in]: The mean value of image red component inside the shadow region
We could successfully detect the plaque boundary in the guide wire shadow region
by using the newly proposed hybrid boundary detection method.
Then shadow region
and nonshadow region are separated.
For example, we consider one continuous shadow region
in the interval [[y.sub.m], [y.sub.n).] We call the point ([y.sub.n], [z.sub.n)] as a "turning point" because it is a start of a shadow region
interval from right side to left side.
The depicted shadow region
is a right circular cylinder with the singularity on its axis.
They used a HSV color space and exploit the statistical assumptions that in a shadow region
, the brightness and saturation properties are reduced while hue properties remain same.
Mostly, an object higher than its surroundings, such as a mountain, hill, radio tower, church steeple, tree, person, or boat mast located within or along the edge of the charge shadow region
, is targeted.
Furthermore, there is no color information in the shadow region
due to the fact that the regions contain predomithat the regions contain predominantly gray tones (low valence in Fig.