Operation and Features
BASLER L304
kc 3-57
Draft
3.11.8 Test Image Six (Fixed Blue Gradient)
Test image six is formed with a vertical blue gradient that ranges from 0 to 255 and repeats every
256 pixels as shown in Figure 3-35. The first pixel in each line has a red value of 0, a green value
of 0 and a blue value of 0. The second pixel has a red value of 0, a green value of 0 and a blue
value of 1. The third pixel has a red value of 0, a green value of 0 and a blue value of 2. And so on.
Test image six is useful for checking to see if your frame grabber is configured correctly. For
instance, if you have test image five enabled and you see that the blue values in your captured
lines are all 0 and that the red values or the green values are increasing in the gradient, you should
suspect a frame grabber misconfiguration.
Figure 3-35: Test Image Six
3.11.9 Test Image Seven (Uniform Gray)
In test image seven, all pixels will have a red value, a green value and a blue value of 64 when
the camera is set for 8 bit output. When the camera is set for 10 bit output, all pixels will have a
red, a green and a blue value of 256.
Test image seven should appear as a uniform, gray image.
Test image seven is useful for checking the integrity of the data transmitted by the camera. If you
capture lines and examine the pixel values in the captured lines, the values should be exactly as
described above.
Test image seven is also useful if you want to see a visual indication of the effects of using PRNU
shading correction. If you enable test image seven and you also enable PRNU shading correction,
the effects of the PRNU shading correction feature will be visible in the captured test images.
(Normally, shading correction should be disabled when you use any test image. You should only
enable PRNU shading correction with test image seven if you want to see the effect that this type
of shading correction will have on a uniform image.)
Figure 3-36: Test Image Seven
L
The description of the pixel values in test image six is only valid when the camera is
set for 8 bit output. If the camera is set for 10 bit output, the gradients range from 0
to 1023 and repeat every 1024 pixels
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