Setting the Conditions for Each Object Type
3-23
3
Image A
Light
level 0
Image B
Light
level 180
- Subtraction
(Image A - Image B)
- Subtraction
(Image B - Image A)
- The absolute value
of the differences
( | Image A - Image B | )
(3) Comparative calculations between images
It is possible to run calculations on the differences between the images taken by camera 1 and
camera 2, as well as on the differences between the current image and the already stored reference
image.
1
Type of calculation
There are two types of calculation: "subtraction" and the "absolute value of the differences."
[Example of comparative calculations between images]
Light level in image 1 (0 to 255) - Light level in image 2 (0 to 255)
-
Light level after calculation
However, a result less than 0 will give a result of 0.
| Light level in image 1 (0 to 255) - Light level in image 2 (0 to
255) |
-
Light level after calculation (0 to 255)
Subtraction
The absolute value
of the differences
