Sumix SMX-11M5 Series, User Manual

Page: 35 / 64

Tuning Guidelines: Sensor Controls
35 SMX-11M5x Series USB2.0 Camera User Guide
the less the frame rate is. This control defines the frequency of polling the camera for its
image stream.
Decimation
Use the Decimation drop-down box to decimate (sub-sample) the picture by 2, 3, 4, 5,
6, 7 or 8. The decimation means excluding pixels and rows from the scan process (for
example, every second pixel and second row for the 1:2 decimation). This mode thus
allows viewing the picture at the higher frame rate.
The higher decimation can be used for preview, when 1600 x 1200 image can be
displayed as 800 x 600 with the frame rate two times higher.
Viewport
Viewport is a rectangular area of the sensor on which the image is scanned. It can have
variable size: from the full sensor field of view to the small area of 8 x 8 pixels. The
smaller vertical size (in lines) of the viewport, the faster the scan process and the higher
the frame rate is.
To change the viewport:
1 Press Alt+v on the keyboard
OR
Click the Settings… button below Viewport (pix)
OR
Click the Viewport Settings button on the toolbar:
2 The Viewport Settings window will open.
Figure 4-8 Viewport Settings window