MATRIX 120™ REFERENCE MANUAL
76
6
6.3.2 Matrix 120 210-xxx 2D Codes WVGA
Vignetting
For Matrix 120 readers used in 2D code reading applications, due to the "fisheye" or
“vignetting” effect of the lens, the reading area is limited to the central zone of the Vertical
Field of View.
Figure 61
– WVGA Model Vignetting Effect
Depending on the application,
Image Cropping
can be applied above and below the central
zone of the Vertical FOV, limiting image acquisition to the effective reading area and
therefore increasing frame rate and reducing overall image processing time.
Max FOV
H
Horizontal
Reading Width
Reading Distance
Max FOV
V
Reading Diagrams guaranteed
for 80% of Max Vertical FOV on
WVGA models
