Baumer TXG - 4.5.2 Correction Algorithm

45
CorrectionAlgorithm4.5.2
On monochrome cameras of the Baumer TXG series, the problem of defect pixels is
solved as follows:
Possible defect pixels are identied during the production process of the camera. ▪
The coordinates of these pixels are stored in the factory settings of the camera (see ▪
4.5.3. Defectpixellist).
Once the sensor ▪ readout is completed, correction takes place:
Before any other processing, the values of the two neighboring pixels on the left and ▪
the right side of the defect pixel, will be read out
Then the average value of these 4 pixels is determined ▪
Finally, the value of the defect pixel is substituted by the previously determined ▪
average value
Defect Pixel Average Value Corrected Pixel
4.5.3 Defectpixellist
As stated previously, this list is determined within the production process of Baumer cam-
eras and stored in the factory settings (see 4.8.1.).
Additional hot or cold pixels can develop during the lifecycle of a camera. In this case
Baumer offers the possibility of adding their coordinates to the defectpixellist. The user
can determine the coordinates
*)
of the affected pixels and add them to the list. Once the
defect pixel list is stored in a user set (see 4.8.), pixel correction is executed for all coor-
dinates on the defectpixellist.
*) Position in relation to Full Frame Format.
◄Figure47
Schematic diagram of
the Baumer pixel
correction.