Image Acquisition Control AW00089317000
126 Basler ace GigE
Flash Window in Global Reset Release Operating mode (GRR)
If you are using the global reset release mode, you should use flash exposure for capturing images
of both stationary and moving objects.
If you don’t use flash exposure when capturing images of
stationary objects, the brightness in each acquired image will vary significantly from top to
bottom due to the differences in the exposure times of the lines.
moving objects, the brightness in each acquired image will vary significantly from top to
bottom due to the differences in the exposure times of the lines and the images will be
distorted due to the temporal shift between the end of exposure for each line.
You can avoid these problems by using flash lighting and by applying the flash during the "flash
window" for each frame.
Fash window = period of time during a frame acquisition when all of the lines in the sensor are
open for exposure.
In global reset release mode, the flash window opens when the frame is triggered and closes after
a time period equal to the Exposure Time Abs parameter setting. Thus, the flash window width is
equal to the Exposure Time Abs parameter setting.
Flash window width = how long the flash window will remain open.
For more information about the Exposure Time Abs parameter, see Section 7.6 on page 115.
Line 1
Line 2
Line 4
Line 3
Line 5
Line 6
Line 8
Line 7
Line 9
Line 10
Line 11
Line N-2
Line N
Line N-1
Flash Window Width
= line exposure time
= line readout time
Flash Window
Fig. 65: Flash Window for Rolling Shutter in the Global Reset Release Mode
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