Comparative Calculations Between Images - Sharp IV-S20 User Manual

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[6] 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.
Subtraction
The absolute value
of the differences
[Example of comparative calculations between images]
9
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)
Image A
· Subtraction
(Image A - Image B)
· Subtraction
(Image B - Image A)
· The absolute value
of the differences
( | Image A - Image B | )
Light
level 0
Light
level 180
9-24
Image B