Alpine X009-FD1 Quick Reference Manual page 102

* Smear phenomenon:
A phenomenon which occurs when a high-intensity spot (such
as a reflection of the sunlight on a car body) is shot by the
camera. The picture below is an example of 'vertical smear'
common to CCD cameras.
Error between the screen and the actual road surface
In the following conditions, errors are produced between the screen
guidance and the actual road surface. (The illustrations represent a case
when the camera is installed in the standard position.)
When there is a steep upward slope behind the car
(example)
<Screen>
Distance guidance marks
<Situation of the car>
The distance guidance mark represents the distance to a
flat road surface. Therefore in the case of an upward
slope behind the car, the distance guides are displayed
closer to the rear bumper than the actual distance. For
example, if there is an obstacle on the upward slope, it
may appear farther away than its actual position.
Also, an error may occur between the guidance and the
actual path of the car on the road surface.
A high-intensity spot
Actual distances
Error Error
When there is a steep downward slope behind the
car (example)
<Screen>
<Situation of the car>
In the case of a downward slope behind the car, the
distance guides are displayed farther from the rear
bumper than the actual distance.
If there is an obstacle on the downward slope, it seems
closer than its actual position.
Also, an error may occur between the guidance and the
actual path of the car on the road surface.
Error Error
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