Imaging sensor interpixel correlation (IC), i.e. pixel-to-pixel interference, lowers the sensor effective resolution and the ability to handle high contrast. This increases color distortion in color filter array sensors. IC is generally overlooked, and challenging to mitigate. Recent findings regarding scientific grade (CCD or hybrid CMOS) sensors, describe non-linearities causing pixel charge accumulation dependent IC.  GonioLabs' review article motivates the need for a generalization of the point spread function (PSF) into an irradiance-exposure dependent (IED) PSF, also considering super-saturation. The IED PSF is challenging to characterize and apply, partly due to its non-linearity. However, doing so can improve the MTF irrespective of image sensor technology, and for conventional as well as HDRI imaging.

GonioLabs' measurement system includes an innovative imaging sensor interpixel correlation analysis and reduction algorithm that facilitates the high-contrast measurement necessary to characterize the optically demanding security holograms used in the industry.