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Area of Interest (AOI)

uEye Camera Manual Version 3.80

Area of Interest (AOI)

Using this function, you can set the size and position of an area of interest (AOI) within an image. In this case, only data included in this AOI will be read out and transferred to the computer. The smaller partial image enables the camera to use a higher frame rate.

For information on the AOI position grid and the frame rates that your camera model can achieve with AOI, see the model specifications in the Camera and Sensor Data chapter.

Figure 37: AOI readout on monochrome sensors

Figure 37: AOI readout on monochrome sensors

Figure 38: AOI readout on color sensors

Figure 38: AOI readout on color sensors

Hinweis

Note on step widths for AOI definition (position grid)

The available step widths for the position and size of image AOIs depend on the sensor. The values defining the position and size of an AOI have to be integer multiples of the allowed step widths.

For details on the AOI grids of the individual camera models, please see Camera and Sensor Data and click a camera model.

Hinweis

Please note that, after defining an AOI, the resulting image may be darker if the camera cannot maintain the originally set exposure time due to the increased frame rate.

Multi AOI

The Multi AOI function allows defining more than one AOI in an image and transferring these AOIs all at the same time. Not all uEye models support this feature.

In the Multi AOI mode provided by the UI-124x/UI-524x models, you can define two or four AOIs in one image and transfer them simultaneously. The AOIs are positioned side by side or one below the other, and share the same X or Y axis (see illustration).

Figure 39: uEye Demo - Multi AOI on the UI-1240-C

Figure 39: uEye Demo - Multi AOI on the UI-1240-C

 

See also:

uEye Demo: Size
uEye Demo: Multi AOI
 
Programming: is_AOI()

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