Method and apparatus for determining sensor format factors from image metadata
First Claim
1. A computer-implemented method, comprising:
- examining, by a computing device, metadata corresponding to an input image to determine a particular one of a plurality of techniques for determining a sensor format factor for a camera used to capture the input image from information in the metadata, the plurality of techniques comprising at least a first technique configured to determine the sensor format factor from a ratio of a diagonal of 35 mm film and a diagonal of a sensor region used to capture the input image, the diagonal of the sensor region determined based on an image width, an image height, a focal plane X resolution, and a focal plane Y resolution of the input image that are obtained from the metadata; and
applying the particular technique to information obtained from the metadata corresponding to the input image to determine the sensor format factor for the camera used to capture the input image.
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Accused Products
Abstract
Method and apparatus for determining sensor format factors from image metadata in which one of multiple techniques is applied to determine a sensor format factor for a camera from information in the metadata. Information from the metadata may be used to identify which of the multiple techniques to use. For example, the camera make and model may be used to determine a particular technique to use. As another example, the presence or absence of particular attributes or values for particular attributes may be used in determining a particular technique. In one embodiment, a profile database may be searched according to information in the metadata to determine if a sensor format factor for the camera is in the database. If the sensor format factor for the camera is not in the database, other information in the metadata may be examined to determine a particular technique from among the plurality of techniques.
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Citations
30 Claims
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1. A computer-implemented method, comprising:
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examining, by a computing device, metadata corresponding to an input image to determine a particular one of a plurality of techniques for determining a sensor format factor for a camera used to capture the input image from information in the metadata, the plurality of techniques comprising at least a first technique configured to determine the sensor format factor from a ratio of a diagonal of 35 mm film and a diagonal of a sensor region used to capture the input image, the diagonal of the sensor region determined based on an image width, an image height, a focal plane X resolution, and a focal plane Y resolution of the input image that are obtained from the metadata; and applying the particular technique to information obtained from the metadata corresponding to the input image to determine the sensor format factor for the camera used to capture the input image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system, comprising:
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at least one processor; and a memory comprising program instructions stored thereon, the program instructions executable by the at least one processor to; examine metadata corresponding to an input image to determine a particular one of a plurality of techniques for determining a sensor format factor for a camera used to capture the input image from information in the metadata, the plurality of techniques comprising at least a second technique configured to determine the sensor format factor from a focal length of a lens used to capture the input image and focal length in 35 mm film of the lens used to capture the input image, wherein the second technique further comprises dividing the focal length in 35 mm film by the focal length of the lens to generate an estimated sensor format factor, and clipping the estimated sensor format factor to generate the sensor format factor; and apply the particular technique to information obtained from the metadata corresponding to the input image to determine the sensor format factor for the camera used to capture the input image. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A non-transitory computer-readable medium comprising program instructions stored thereon that, responsive to execution by a computer, perform operations comprising:
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examining metadata corresponding to an input image to determine a particular one of a plurality of techniques for determining a sensor format factor for a camera used to capture the input image from information in the metadata, the plurality of techniques comprising at least a first technique configured to determine the sensor format factor from a ratio of a diagonal of 35 mm film and a diagonal of a sensor region used to capture the input image, the diagonal of the sensor region determined based on an image width, an image height, a focal plane X resolution, and a focal plane Y resolution of the input image that are obtained from the metadata; and applying the particular technique to information obtained from the metadata corresponding to the input image to determine the sensor format factor for the camera used to capture the input image. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification