Photon Focus CameraLink MV1-D1280, User Manual

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5 Functionality
5.1.2 Flip Image, Mirror Image
Flip and mirror image are available to allow the application to use any type of lens (with or
without mirror). Flip and mirror image is applied prior to the ROI configuration.
Flip- and mirror image feature is not available in the colour cameras.
5.1.3 Decimation (monochrome cameras)
Decimation reduces the number of pixels in x- and y-direction. Decimation in y-direction
transfers every n
th
row only and directly results in reduced read-out time and higher frame rate
respectively. Decimation in x-direction transfers every n
th
column only. The decimation in
x-direction reduces only the amount of data but not the read-out time. Therefore the frame
rate remains constant.
Decimation can also be used together with ROI. In this case every ROI should have
a height and width that is a multiple of the corresponding decimation setting.
E.g. if decimation=3, then the height of every ROI should be a multiple of 3.
Fig. 5.1 shows decimation in y-direction on the full image. The rows that will be read out are
marked by red lines. Row 0 is read out and then every n
th
row.
( 0 , 0 )
( x
m a x
, y
m a x
)
Figure 5.1: Decimation in full image
Fig. 5.2 shows decimation on a ROI. The row specified by the Window.Y setting is first read out
and then every n
th
row until the end of the ROI.
The image in Fig. 5.3 on the right-hand side shows the result of decimation 3 of the image on
the left-hand side.
An example of a high-speed measurement of the elongation of an injection needle is given in
Fig. 5.4. In this application the height information is less important than the width
information. Applying decimation 2 on the original image on the left-hand side doubles the
resulting frame rate.
.
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