CAMERA LINK vieworks LVC-25MC2-30, User Manual

Page: 48 / 86

VC Camera Link series
Page 48 of 86 RA14-11A-010
8.8 Defective Pixel Correction
The CMOS sensor may have Defect Pixels which cannot properly react to the light. Correction is required since
it may deteriorate the quality of output image. Defect Pixel information of CMOS used for each camera is entered
into the camera during the manufacturing process. If you want to add Defect Pixel information, it is required to
enter coordinate of new Defect Pixel into the camera.
For more information, refer to Appendix A . The
“sdc” command is used to set whether to use Defective Pixel
Correction feature.
8.8.1 Correction Method
Correction value for Defect Pixel is calculated based on valid pixel value adjacent in the same line.
L3 L2 L1 R1 R2 R3
<Current Pixel>
Figure 8.13 Location of Defect Pixel to be corrected
If Current Pixel is a Defect Pixel as shown in the above figure, correction value of this pixel is obtained as shown
in the following table depending on whether surrounding pixel is Defect Pixel or not.
Adjacent Defect Pixel(s) Correction value of Current Pixel
None (L1 + R1) / 2
L1 R1
R1 L1
L1, R1 (L2 + R2 ) / 2
L1, R1, R2 L2
L2, L1, R1 R2
L2, L1, R1, R2 (L3 + R3) / 2
L2, L1, R1, R2, R3 L3
L3, L2, L1, R1, R2 R3
Table 8.8 Calculation of Defect Pixel Correction Value