Solid state image sensors: Improvements in signal processing techniques

The use of a single dimension 512 element array for film scanning resulted in the production of pictures from film using a 512 element switched-diode array. while the pictures were of fairly good quality, they fell short of normal broadcast standards for two principle reasons; one was the insufficient resolution obtained and the other was the presence of fixed pattern noise appearing as vertical stripes in the picture background. Techniques which have been developed to combat these effects are described and the picture quality now obtainable is assessed.