Basler L304kc User Manual

Operation and Features
3-38 BASLER L304kc
Draft
For example, assume that the High Pixel Threshold for the red line in the sensor is set to 200. Also
assume that the camera has captured a red line and that 56 of the pixels in that line have a value
greater than 200. In this case, the total high pixels would be 56.
There is a separate High Pixel Threshold setting for each of the three lines in the sensor. See
Section 3.8.1 for information about setting the High Pixel Threshold values.
The total high pixels for any captured line does not include the 16 added “stamp pixels.” If the AOI
feature is being used, the total high pixels is based only on the pixels within the AOI.
Stamp Pixels S11 and S12
Stamp pixels S11 and S12 represent the least significant and most significant bytes (respectively)
of the total low pixels. The total low pixels indicates the number of pixels in a captured line that
are below a parameter called the “Low Pixel Limit.” The total low pixels can range from 0 to 4080.
For example, assume that the Low Pixel Limit for the red line in the sensor is set to 100. Also
assume that the camera has captured a red line and that 22 of the pixels in that line have a value
less than 100. In this case, the total low pixels would be 22.
There is a separate Low Pixel Limit setting for each of the three lines in the sensor. See Section
3.8.1 for information about setting the Low Pixel Limit values.
The total low pixels for any captured line does not include the 16 added “stamp pixels.” If the AOI
feature is being used, the total low pixels is based only on the pixels within the AOI.
The total high pixel and total low pixel values are useful if you want to perform automatic gain
control from within your camera control software application. If you find that the total low pixel
values are increasing over a period of time, an increase in the gain settings would be appropriate.
If you find that the total high pixel values are increasing over a period of time, a decrease in the
gain settings 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 can range from 0 to 4173840.
The line contrast does not include any of the 16 added “stamp pixels.” If the AOI feature is being
used, the line contrast is based only on the pixels within the AOI.
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.
Line Contrast Pixel Value
n + 1
Pixel Value
n
–()
n = 1
n = 4079
∑
=

Basler L304kc Specifications

General

Brand	Basler
Model	L304kc
Category	Security Camera
Language	English