Micron Technology USB Camera manual Decimation, Viewport Settings

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SMX-M8xx Series USB2.0 Camera User Guide

Decimation

Use the Decimation control to decimate (sub-sample) the picture by 2, 4, etc. The decimation means excluding pixels and rows from the scan process (e.g. every second pixel and second row for the 1:2 decimation). This mode thus allows viewing the full picture at the higher Frame Rate (see chapter “Frame Rate Control” ). The decimation can be used for preview, when the full 1600x1200 image displayed as 800x600 with the frame rate twice higher. Use its dropdown menu to change Decimation.

Viewport Settings

Viewport is a rectangular area of the sensor on which the image is scanned. It can have variable size, from the smallest area of 8x8 pixels to the full field of view of the sensor. The smaller the size of the Viewport, the faster the scan process, and the higher Frame Rate (see chapter “Frame Rate Control” ). To open the Viewport Settings dialog (see Figure 4-1 Viewport Setting dialog: the case of the SMX-M82C Camera), press Alt+V or click the corresponding button on the toolbar:

Figure 4-1Viewport Setting dialog: the case of the SMX-M82C Camera

The blue rectangle represents the current viewport window related to the full possible field of view. Drag the rectangle across the full resolution area for the viewport panning. The changes are displayed in the View window immediately.

Use the boxes in the bottom part to set the viewport offset and size manually and click the Apply button to apply the settings. The values should be divisible by 8 and will be rounded and applied automatically within 2 seconds after last keystroke.

Sensor Control: Decimation