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.

Fig. 38: AOI readout on monochrome sensors

Fig. 39: 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.

Fig. 40: uEye Demo - Multi AOI on the UI-1240-C

Sequence AOI mode

Apart from the multi AOI mode models UI-124x/UI-324x/UI-524x also support the sequence AOI mode.This mode allows to define up to four AOIs, which need to have the same size but may differ in position, exposure time or gain settings.

Fig. 41: uEye Cockpit - sequence AOI mode

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Area of interest (AOI)