uEye .NET Manual 4.97

The Exposure class provides methods for controlling the exposure of a uEye camera.

Applying new settings

In freerun mode, any modification of the exposure time will only become effective when the image after next is captured. In trigger mode, the modification will be applied to the next image.

Accuracy of the exposure time setting

The increments for setting the exposure time depend on the sensor's current timing settings (pixel clock, frame rate). The smallest increment usually corresponds to the duration of one pixel row, which is the time it takes the sensor to read out one pixel row.

You can query the actual exposure time setting with Get().

Some sensors allow setting the exposure time in smaller increments. Using GetSupported(), you can check whether your sensor supports these methods.

For minimum and maximum exposure times as well as other sensor-based dependencies, please refer to the "Camera and sensor data" chapter in the uEye manual.

Rounding errors from increments

When calculating a new exposure time based on the returned increment, note that calculations with floating point values in the PC will always be subject to rounding errors. Therefore, an addition or subtraction of the increment value might not always produce the exact desired result. In this case, the uEye API rounds down the floating point value and sets the exposure time to the next lower value.

You can avoid this behavior by additionally adding the value INCREMENT/2.f (half increment) when calculating with the increment. This ensures that the desired value will be set even after rounding.

The following classes and methods exist:

•Dual

•Fine

•Long

Methods