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UI-124x / UI-524x Application Notes

uEye Camera Manual Version 3.80

UI-124x / UI-524x Application Notes

Hinweis

For the specifications of this model, please see Camera and Sensor Data > UI-124x / UI-524x.

Gain, pixel clock, black level

The quantum efficiency of the monochrome sensor is about 60% at 530 nm.
The sensor's black level cannot be adjusted manually. Automatic black level correction is always enabled.
Use of the gain functions can lead to slight fluctuations of the black level. In global shutter mode
Master gain uses a combination of coarsely scaled analog gain factors and finer digital scaling. To achieve optimum homogeneity of the gray level, use only the gain factors 0, 20, 50, 70 and 100.
The hardware sensor gamma curve has three linear sections. This allows evaluating four times more bits per pixel for the lower gray level values.
With long exposure times at high sensor gain settings, hot pixels can become visible even if correction is enabled.
If the sensor is used in global shutter mode at a low pixel clock frequency and a high gain, the bottom pixel rows might become brighter for technical reasons. In this case, use a higher pixel clock frequency or the rolling shutter mode.
The green pixels of the Bayer sensor have slightly different color values. This will lead to strong artifacts when using 5x5 pixel color conversion (de-Bayering mode: "Best").

Binning, scaling, AOI

2x binning makes the image brighter by a factor of about two. It also reduces image noise.
Binning does not result in a higher frame rate.
Binning can only be enabled for both horizontal and vertical pixels. For this reason, the parameters of the is_SetBinning() function have to be passed together (IS_BINNING_2X_VERTICAL | IS_BINNING_2X_HORIZONTAL) to enable binning. Passing only one parameter might result in undesired settings.
The digital scaling functions result in a higher possible frame rate. The maximum frame rate is increased approximately proportionally to the scaling factor. When using the scaling functions, you can set higher pixel clock frequencies. To achieve the maximum frame rate, select first the scaling factor and then the maximum pixel clock frequency. This way you can achieve up to 400 frames per second.
For improved image quality without undersampling artifacts, the digital scaling feature permanently uses an anti-aliasing filter.
Reducing the horizontal resolution does not result in a higher frame rate.

Line scan mode

Fast line scan mode: The exposure time is fixed to the readout time of one sensor line. Exposure time cannot be changed in this line scan mode.

Multi AOI

When the Multi AOI function is enabled, no changes can be made to the image size settings (e.g. binning, subsampling, scaling). Disable Multi AOI to change the size of an image and then re-enable the function.
If sensor hotpixel correction and Multi AOI are enabled, the sensor displays a four pixel wide black line between the AOIs.
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 detailed information on the AOI grid see the UI-124x / UI-524x chapter.
AOI 1 (X1, X2) must have a minimum width of 16 pixel and a minimum height of 4 pixel. For the following AOI, you may set width and height to 0.

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