Basler BIP2-DXXXXc-dn Uživatelský manuál stáhnout pdf (Strana 65)

AW00101507000 Configuring the Camera

Basler IP Fixed Dome Cameras 61

Rolling Shutter

On cameras equipped with a rolling shutter, the pixel lines are exposed with a temporal offset

(called tRow) from one line to the next. When frame start is triggered, the camera begins exposing

the top line of pixels of the AOI (line one). Then, the camera begins exposing line two tRow later.

And so on until the bottom line of pixels is reached. See Figure 6. The exposure time is the same

for all lines.

Fig. 6: Rolling Shutter

The use of an additional light source (strobe) is recommended in situations where fast movements

are being recorded with rolling shutter cameras as images of fast-moving objects can be blurry

otherwise due to the temporal shift in the start of the exposure of the individual lines. There are two

ways to trigger this additional lighting:

 Flash Window Signal = triggers a short strobe pulse (= flash).

 Exposure Active Signal = triggers a light source that allows a longer illumination period.

Line 1

tRow

Frame Start

Triggered

Line 2

Line 3

Line 4

Line 5

Line 6

Line 7

Line 8

Line 9

Line 10

Line 11

Line n-2

Line n-1

Line n

tRow

= line exposure

= line readout

1 2 ... 60 61 62 63 64 65 66 67 68 69 70 ... 127 128

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