Application notes UI-316x

uEye Camera Manual Version 4.92


Application notes UI-316x

Pixel clock

•The pixel clock can only be adjusted in steps.

•Note the bandwidth requirements for bit depth greater than 8 bits per pixel.

•It is recommended to use packed color formats in 10 bit mode with high pixel clocks.

•The sensor can be operated with an extended pixel clock range to achieve even higher frame rates.

•Activate the internal image memory to use the extended pixel clock ranges of 464 MHz and 480 MHz.

•With a pixel clock of 480 MHz, image artifacts may occur on the left image that are caused by the sensor.

•USB 3 uEye CP Rev. 2 only: Depending on the sensor, the minimum exposure time cannot be set with the maximum pixel clock.

Gain

•The master gain consists of analog gain levels and digital intermediate levels in the sensor.

Trigger

•The maximum frame rate in triggered mode depends on the frame rate control.

Bit depth

•The sensor always runs in 10 bit mode. Internally, the sensor operates with 11 bits. When compressing to 10 bits as well as scaling the working are (about 1500 values within the possible 2048) the histogram shows slight irregularities in the frequencies of values.

Black level

•Automatic black level correction is always enabled.

•The sensor has no black pixels for generating a black level reference. An electronic black level – generated by the sensor – can be displayed on the first line. This black level is used for the internal automatic black level correction. If you use a manual black level, the values of the electronic black level must be transformed with Out = (In - 256 - manual_black_level)*(2/3).

Subsampling/AOI/Binning

•The frame rate can be increased by subsampling and/or using an AOI.

•Only monochrome sensors support binning.

•With maximum pixel clock, binning is not supported.

•Overlapping the trigger is not possible in combination with vertical binning. Therefore, either the maximum exposure time or with constant exposure the maximum frame rate is reduced.

•The frame rate does not increase if the horizontal resolution is reduced by binning.

•The minimum AOI height of 2 pixels is only supported in RAW format.

•If the FPN correction is activated, fast changes of AOI position are only possible with a step width of 32 px in X direction.

Multi AOI

•The sensor supports up to 16 AOIs (horizontal x vertical: 4 x 4).

•The settings of the multi AOI cannot be saved in the parameter file or in the camera.

•Multi AOI and black level reference cannot be used simultaneously.

FPN (fixed pattern noise) correction

•The FPN correction is enabled by default and reduces visible vertical lines in the image. These lines are caused by the sensor. They are factory calibrated using a complex process. The result is a more homogeneous image.

•With maximum gain and gamma, the typical vertical and horizontal structures of the sensor becomes visible. This effect is not reduced by the FPN correction.

IDS line scan ("AOI merge mode")

•For color sensors, the IDS line scan can only be used with at least 2 lines.

USB 2.0 operation

•The camera model does not support USB 2.0 operation.

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