Television – Special applications – Film – disc or card scanning
Patent
1999-03-15
2000-09-12
Lee, Young
Television
Special applications
Film, disc or card scanning
348106, H04N 336
Patent
active
061184780
ABSTRACT:
A method of using telecine apparatus to scan cinematographic film made up of individual image frames. Each frame is scanned a number of times using detected light to generate corresponding image data. Each sub-scanned portion within a frame adjoins another sub-scanned portion to enable reproduction of the complete frame by piecing-together data from the sub-scanned portions to produce data corresponding to the complete frame. To help ensure that no positional anomalies are present between adjoining sub-scans, a correlation step is carried out to identify a correlated alignment in position between data corresponding to adjoining subscans. The data from the subscans used in the correlation step is then adjusted to optimize spatial alignment between the data corresponding to the sub-scans. The correlation and adjustment of the subscan data sets may be repeated so that all of the sub-scans in a frame are optimally aligned in space, enabling the sub-scans to be combined into the complete image frame. In one embodiment, correlation is carried out during a first pass of cinematographic film through a telecine apparatus, while offset adjustments are carried out during a second pass (a rescan pass) of the cinematographic film through the telecine apparatus. In a further extension, the correlation and adjustment may additionally include optimizing and adjusting adjoining sub-scans in a frame for level correlation, such as optimizing brightness correlation between sub-scans.
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Lee Young
Pandora International Limited
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