Distinguishing positive and negative films system and method
First Claim
Patent Images
1. A method for scanning a photographic film that may be a positive or negative film type, comprising the steps of successively:
- performing a pre-scan of the photographic film using a scanner;
sampling a color density of at least one location of the film;
comparing the color density to a standard range indicating an orange bias for the at least one location that is high enough to represent only a negative film type; and
setting the scanner to treat the photographic film as a negative film type if the color density is within the standard range and to otherwise treat the photographic film as a positive film type.
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Abstract
A system and method for scanning a photographic film using a scanner automatedly identifies the film as either a positive or negative and controls the scanner settings to perform the scan accordingly. The method includes performing a pre-scan of the film, sampling a color density of at least one location of the film, comparing the color density to a standard range indicating an orange bias for the at least one location, and setting the scanner to treat the film as a negative if the color density is within the standard range and to otherwise treat the film as a positive.
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Citations
6 Claims
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1. A method for scanning a photographic film that may be a positive or negative film type, comprising the steps of successively:
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performing a pre-scan of the photographic film using a scanner; sampling a color density of at least one location of the film; comparing the color density to a standard range indicating an orange bias for the at least one location that is high enough to represent only a negative film type; and setting the scanner to treat the photographic film as a negative film type if the color density is within the standard range and to otherwise treat the photographic film as a positive film type. - View Dependent Claims (2, 3, 4)
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5. A method of preparing a scanner to scan a photographic film that may be a positive or negative film type, comprising the steps of successively:
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measuring respective color densities of three different color hues, red, green and blue, in the photographic film; comparing the color densities to a standard range which indicates an orange bias that is high enough to represent only a negative film type; and triggering the scanner to treat the photographic film as a negative film type automatically when the color densities are within the standard range and to otherwise treat the photographic film as a positive film type automatically when the color densities are not within the standard range.
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6. A method of preparing a scanner to scan a photographic film that may be a positive or negative film type, comprising the steps of successively:
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measuring color characteristics of the photographic film; determining whether the color characteristics are within a particular range that indicates an orange bias high enough to represent a negative film type and not a positive film type; and triggering the scanner to treat the photographic film as a negative film type automatically when the color densities are within the particular range and to otherwise treat the photographic film as a positive film type automatically when the color densities are not within the particular range.
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Specification