Test Image Four (Horizontal Stripe Pattern) - Basler A400K User Manual

Basic Operation and Features

3.12.4 Test Image Four (Horizontal Stripe Pattern)

Test image four is useful for determining if your frame grabber has dropped the first line from your
image.
The stripes in the horizontal stripe test pattern are
formed with a gradient that ranges from 0 to 255
(8 bit mode) or 0 to 1023 (10 bit mode). A full stripe
is 256 lines (8 bit mode) or 1024 lines (10 bit mode)
high. As an exception, the gray values of the first
stripe range from 1 to 255 or from 1 to 1023,
respectively.
The pixels in line one of the first stripe all have a
value of 1. The pixels in line two of the first stripe all
have a value of 2, the pixels in line three of the first
stripe all have a value of 3, and so on. This pattern
continues until line 255 (8 bit mode), where the pixels
have a gray value of 255, or line 1023 (10 bit mode),
where the pixels have a value of 1023.
In 8 bit mode, a second stripe begins in line 256. The pixels in line 256 have a gray value of 0, the
pixels in line 257 have a value of 1, the pixels in line 258 have a value of 2, and so on. This pattern
continues until line 511 where the pixels have a gray value of 255.
A third stripe begins in line 512. The pixels in line 512 have a gray value of 0, the pixels in line 513
have a value of 1, the pixels in line 514 have a value of 2, and so on. This pattern continues until
line 1726 where the pixels have a value of 190.
In 10 bit mode, a second stripe begins in line 1024.
The pixels in line 1024 have a value of 0, the pixels
in line 1025 have a value of 1, the pixels in line 1026
have a value of 2, and so on. This pattern continues
until line 1726 where the pixels have a value of 702.
3-40
DRAFT
Figure 3-25: Test Image Four (8 bit)
Figure 3-26: Test Image Four (10 bit)
Basler A400k