JAI CV-L108CL User Manual

Contents

JAI CV-L108CL User Manual Manual pdf 13 page image

CV-L108CL126.4. Shading correctionShading is caused either by illumination with uneven distribution of light across the surface, or byvignetting towards the edges of a lens.The shading correction incorporated in the camera will compensate for this effect by as much as20% of the brightest signal.Shading is not compensated for each individual pixel. The signal is averaged across groups of 8pixels in relation to the whole line. The pixel response non-uniformity will be superimposed on theoutput also after shading correction has been performed. Therefore, it is recommended to performa pixel gain (flat-field) correction after shading correction.The Pixel Gain (flat-field) correction function is also used to compensate for shading, but it cannothandle a very wide dynamic range.The shading correction can be configured to compensate each channel separately or can track thegreen channel.6.5. BinningThe binning function in this camera combines the charge collected in two adjacent pixels. Thishalves the effective resolution to 256 pixels, but doubles the sensitivity. The line rate is notaffected by binning.AverageAfter correction: Flat dark signal response from pixel to pixelShading caused by uneven illumination or vignetting at the edges of the lens.Pixel response non-uniformity will be superimposed on the output signalIndividual shading correctionper channelShading correction trackingthe green channel