![]() As one green channel has blue neighbors and the other red, the first will get crosstalk from blue and the other from red, hence they will separate which can cause mazing. ![]() If you, for example via an adapter, use an analog ultra-wide angle lens with your digital camera the incoming light may arrive at such a low angle that some light passes through one color filter and gets registered in a neighboring pixel belonging to a different color channel - this is crosstalk. Green equiliberation can also be used to equalize green split caused by crosstalk. The DCB demosaicing algorithm is very sensitive to green split so it is good to use while trying to find the best value. Set the value high enough for the mazing to disappear but no higher. The threshold sets the percentage difference below which neighboring green values are equilibrated. Green equilibration suppresses interpolation artifacts that can result from using demosaic algorithms which assume identical response of the two green channels. One green filter may get a small pollution from the red filter and the other from the blue for example. ![]() This is generally not a designed feature of the sensor, but rather a result of limitations in the manufacturing process when the color filters are applied to the sensor surface. Some cameras (for example Olympus, Panasonic, Canon 7D, and some medium format cameras) use slightly different green filters in the two green channels of the color filter array on the camera sensor. Cross-hatch pattern due to imbalance of the two green channels. ![]()
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