CONDITION DEPENDENT SHARPENING IN AN IMAGING DEVICE
First Claim
Patent Images
1. A method of reducing blur in an image generated by an imaging device, the method comprising:
- determining values of one or more atmospheric variables for the image, the one or more atmospheric variables characterizing conditions under which the image is generated;
determining a sharpening filter for the image, the sharpening filter derived from a modulation transfer function of the imaging device at conditions characterized by the values of the one or more atmospheric variables determined for the image; and
applying the sharpening filter to the image.
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Abstract
Blur is reduced in an image generated by an imaging device by determining values of one or more atmospheric variables for the image, the one or more atmospheric variables characterizing conditions under which the image is generated. With these values, a sharpening filter is determined for the image. The sharpening filter is derived from a modulation transfer function of the imaging device at conditions characterized by the values of the one or more atmospheric variables determined for the image. The sharpening filter is subsequently applied to the image.
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Citations
20 Claims
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1. A method of reducing blur in an image generated by an imaging device, the method comprising:
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determining values of one or more atmospheric variables for the image, the one or more atmospheric variables characterizing conditions under which the image is generated; determining a sharpening filter for the image, the sharpening filter derived from a modulation transfer function of the imaging device at conditions characterized by the values of the one or more atmospheric variables determined for the image; and applying the sharpening filter to the image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An imaging device for which modulation transfer functions have been determined for respective conditions characterized by one or more atmospheric variables, the imaging device operative to generate an image and comprising:
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a sensor, the sensor operative to determine values of the one or more atmospheric variables for the image, the one or more atmospheric variables characterizing conditions under which the image is generated; a memory storing a filter table, the filter table operative to return a sharpening filter for the image, the sharpening filter derived from the modulation transfer function of the imaging device at conditions characterized by the values of the one or more atmospheric variables determined for the image; and a processor, the processor operative to apply the sharpening filter to the image. - View Dependent Claims (13, 14)
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15. An imaging system, the imaging system operative to generate an image and comprising:
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an imaging device, modulation transfer functions having been determined for the imaging device for respective conditions characterized by one or more atmospheric variables, the imaging device comprising a sensor, the sensor operative to determine values of the one or more atmospheric variables for the image, the one or more atmospheric variables characterizing conditions under which the image is generated; and a computing device, the computing device comprising a memory storing a filter table, the filter table operative to return a sharpening filter for the image, the sharpening filter derived from the modulation transfer function for the imaging device at conditions characterized by the values of the one or more atmospheric variables determined for the image, and a processor, the processor operative to apply the sharpening filter to the image. - View Dependent Claims (16, 17)
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18. A method of configuring an imaging system to provide a capability in the imaging system for reducing blur in an image generated by an imaging device of the imaging system, the method comprising:
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determining modulation transfer functions of the imaging device for respective conditions characterized by one or more atmospheric variables; determining sharpening filters for the imaging device for the respective conditions characterized by the one or more atmospheric variables, the sharpening filters derived from the determined modulation transfer functions; and storing the sharpening filters in a memory. - View Dependent Claims (19, 20)
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Specification