Basler Vision Technologies Sprint Series, Руководство пользователя

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Features
140 Basler sprint Mono Cameras
that the total high pixel values are increasing over a period of time, a decrease in the gain setting
would be appropriate.
Stamp Pixels S13, S14, and S15
Stamp pixels S13, S14, and S15 represent the least significant, middle, and most significant bytes
(respectively) of the line contrast. The line contrast is the sum of the difference in pixel values for
each pair of neighboring pixels in the captured line. In mathematical terms, the line contrast is:
The line contrast does not include any of the 16 added “stamp pixels.” The line contrast is based
only on the pixels within the current AOI (see Section 6.2.1 on
page 120 ).
Line contrast values are useful when you are adjusting the camera’s focus. Generally, the higher
the line contrast value, the better the focus.
Stamp Pixel S16
Stamp pixel S16 is reserved for future use. Currently, its value will always be 0.
6.5.1 Enabling and Setting the Line Stamp
You can enable and set the stamp feature with the Camera Configuration Tool Plus (CCT+) or by
using binary write commands from within your own application to set the camera’s control and
status registers (CSRs).
With the CCT+
With the CCT+ (see Section 7.1 on page 156 ), you use the Stamp Mode parameter in the Stamp
parameters group to enable the stamp. You use the Stamp Low Pixel Limit parameter and the
Stamp High Pixel Threshold parameter to set the low pixel limit and the high pixel threshold.
By Setting CSRs
You enable the stamp feature by writing the appropriate value to the Mode field of the Line Stamp
Mode CSR (see
page 180 ).
You set the low pixel limit by writing a value to the Low Pixel Limit field in the Line Stamp Low Pixel
Limit CSR (see
page 181 ).
You set the high pixel threshold by writing a value to the High Pixel Threshold field in the Line Stamp
High Pixel Threshold CSR (see
page 182 ).
See Section 7.2.2 on page 164 for an explanation of CSRs and Section 7.3.1 on page 197 for an
explanation of using read/write commands.
Line Contrast Pixel Value
i + 1
Pixel Value
i
–
i = first pixel in AOI
last pixel in AOI -1
∑
=