Line Distance (ImageCalibrationLineDistance)

What is line distance?

allPIXA color linescan cameras have 3 color lines (RGB) to provide the best possible image quality. Therefore, a real sensor value is available for each pixel in all 3 color channels, no demosaicing with the resulting loss of resolution is necessary.

All lines are physically arranged at different positions on the sensor. This results in a shift of the 3 color channels in the raw image. All allPIXA cameras provide an internal correction function for this physically caused effect.

Setting up the parameters

In a standard setup where the camera is aligned perpendicular to the object and the resolution in the sensor direction equals the resolution in the transport direction, the Line Distance parameter is 2.

Step	Description
Calculate the LineDistance parameter	or
Navigate in the feature tree to Image Calibration Control → Camera Arrangement
Set the LineDistance parameter ImageCalibrationLineDistance
There are different options available to set the transport direction with the parameter ScanDirectionSource

Effect of the Line Distance parameter

With correct LineDistance (subpixel compensation)	Without correct LineDistance (subpixel compensation)