Image stitching from multiple line scanners

A system comprising:

• a supply reel, including a film roll to be scanned;
• a take-up reel, to store the film roll after being scanned;
• a scanner, located between the supply reel and the take-up reel, including a first line scan sensor having a first field of view and a second line scan sensor having a second field of view to scan the film roll while the film roll progresses from the supply reel to the take-up reel;
• a processor;
• and
• a memory storing instructions which, when executed by the processor, cause the processor to:
• receive a first data stream from the first line scan sensor and a second data stream from the second line scan sensor;
• select an overlap position between for the first field of view from the first data stream and the second field of view from the second data stream, wherein the overlap position forms an overlap area between the first data stream and the second data streams;
• calculate a difference measure between the first data stream and second data stream in the overlap area;
• iteratively alter, as the film roll progresses, the overlap position between the first field of view and the second field of view to form a plurality of overlap positions and calculating a plurality of difference measures at different positions along a length of the film roll, wherein each difference measure of the plurality of difference measures corresponds to one overlap position of the plurality of overlap positions, wherein iteratively altering the overlap position comprises iteratively adjusting a size of the overlap area at different positions in the film roll as the film roll progresses such that a first number of pixels in a first overlap area of a first overlap position is different than a second number of pixels in a second overlap area of a second overlap position;
• select a blending position corresponding to a given overlap position of the plurality of overlap positions with the smallest difference measure from among the plurality of overlap positions;
• and
• blend the first data stream and second data stream at the blending position.

A non-transitory, computer-readable medium storing instructions which, when executed by a processor, cause the processor to:

• select an overlap position on a film roll between a first field of view of a first line scan sensor that reads a first data stream from the film roll and a second field of view of a second line scan sensor that reads a second data stream from the film roll, wherein the overlap position forms an overlap area between the first field of view and second field of view;
• progress the film roll from a supply reel to a take-up real, wherein the first line scan sensor and the second line scan sensor are located between the supply reel and the take-up real where the film roll is exposed;
• calculate a difference measure between the first data stream and second data stream in the overlap area;
• iteratively alter, as the film roll progresses, the overlap position between the first field of view and second field of view to form a plurality of overlap positions and calculating a plurality of difference measures at different positions along a length of the film roll, wherein each difference measure of the plurality of difference measures corresponds to one overlap position of the plurality of overlap positions, wherein iteratively altering the overlap position comprises iteratively adjusting a size of the overlap area at different positions in the film roll as the film roll progresses such that a first number of pixels in a first overlap area of a first overlap position is different than a second number of pixels in a second overlap area of a second overlap position;
• select a blending position corresponding to a given overlap position of the plurality of overlap positions with the smallest difference measure from among the plurality of overlap positions;
• and
• blend the first data stream and second data stream at the blending position.