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• Bill requested to correct all pixels.
• For each group of pixels common mode is evaluated cm for using pixels defined by mask (1), then applied for to all pixels in the group.

Best pnccd image correction algorithm for sxrx22915

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• Image for raw data has horizontal and vertical stripes
• pedestals and gain, averaged for many images (common mode is averaged to zero), have vertical strips ONLY!
• So, common mode effect gives strong contribution in rows (horizantal strips)
• Median algorithms gives bands in image depending on regions of image brightness
• Algorithm properly accounting masked pixel regions with large signal removes image artifacts.

References

• Common mode correction algorithms
• Common mode correction improvement for Epix100

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