CV-L108CL
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6.4.
Shading correction
Shading is caused either by illumination with uneven distribution of light across the surface, or by
vignetting towards the edges of a lens.
The shading correction incorporated in the camera will compensate for this effect by as much as
20% of the brightest signal.
Shading is not compensated for each individual pixel. The signal is averaged across groups of 8
pixels in relation to the whole line. The pixel response non-uniformity will be superimposed on the
output also after shading correction has been performed. Therefore, it is recommended to perform
a pixel gain (flat-field) correction after shading correction.
The Pixel Gain (flat-field) correction function is also used to compensate for shading, but it cannot
handle a very wide dynamic range.
The shading correction can be configured to compensate each channel separately or can track the
green channel.
6.5.
Binning
The binning function in this camera combines the charge collected in two adjacent pixels. This
halves the effective resolution to 256 pixels, but doubles the sensitivity. The line rate is not
affected by binning.
Average
After correction: Flat dark signal response from pixel to pixel
Shading caused by uneven illumination or vignetting at the edges of the lens.
Pixel response non-uniformity will be superimposed on the output signal
Individual shading correction
per channel
Shading correction tracking
the green channel