Frame interline transfer (FIT)
Vertical smear
One problem with interline transfer is vertical smear. This occurs when a very strong highlight is in the picture and results in a vertical line running through the highlight. It is caused by the light penetrating very deeply into the semiconductor structure and leaking directly into the vertical shift register. Since only longer wavelength light is able to penetrate deeply into the silicon, the vertical smear appears as a red or a pink line.
Frame interline transfer
In an attempt to eliminate the vertical smear the frame interline transfer (FIT) was developed. This combines the interline method of transferring the charge horizontally to an adjacent storage cell but then moves the charge down vertically ...
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