Basler Camera Manual do Utilizador descarregar pdf (Página 5)

• Gain is defined by how much brightness is visible from the screen's centre and can be

adjusted from 0 to 255. Changing this parameter will not influence the frame rate of the

video (see Appendix), it only adjust the brightness of the clip.

• Bytes per packet can be adjusted from 160 to 4096. Changing this parameter has no

effect on the image, but the frame rate is influenced. When the bytes per packet are set to

the maximum, the camera will transmit frames at its maximum specified rate. When the

bytes per packets is reduced, more packets per frame are needed and the camera will

transmit the frames at a lower rate according to formula (3) (note: the denominator is the

frame transmission time):

maximum frame rate (in fps) =

packets per frame x 125µs

(3)

7. Options Æ Video Capture Filter Æ AOI

The area of interest (AOI) feature allows you to specify a portion of the CMOS array to

be transmitted out of the camera. You can specify a portion of the array and only that

picture information will be transmitted. The rest, which is outside the area of interest, will

be discarded. This allows you to record at higher frame rates. This feature is only

available when the camera is set to operate in video Format 7, mode 0.

The area of interest is referenced with respect to the top left corner of the CMOS array.

As shown in figure 1, the upper left corner is designated as column 0 and row 0. The

location and size of the area of interest is defined by specifying its upper left corner point

(left column, top row, width and height). The following restriction on the parameter

values hold:

Left Width 656, Top Height 490

≤+≤

, all values are 0 or divisible by 2.

For example, suppose that you specify the left column as 10, the width as 16 (that means

from the 10

column until the 26

) and the top row as 4 and the height as 10 (that means

from the 4

row until the 14

). This area of interest in this case is shown in Figure 1.

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