System and method for electronic stabilization for second generation forward looking infrared systems
First Claim
1. An image stabilization system comprising:
- first means mounted on a platform for sampling an image in response to timing control signals and outputting a plurality of imaging signals in response thereto;
second means for detecting vibration of said platform and providing a signal in response thereto; and
third means responsive to said second means for adjusting said timing control signals to cause said first means to sample said image and thereby compensate for an effect of vibration on said imaging signals, said third means including means for compensating for vibration which causes compressed images.
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Abstract
An image stabilization system and method. The inventive system (100) includes an image sampling circuit (230) mounted on a platform (400) for sampling an image in response to timing control signals and outputting a plurality of imaging signals in response thereto. An azimuth resolver (310) detects vibration of the platform and providing a signal in response thereto. A microprocessor (540) adjusts the timing control signals to cause the image sampling circuit (230) to sample the image and thereby compensate for an effect of vibration on the image. In the illustrative embodiment, the microprocessor (540) includes software for compensating for vibration that causes image offset, compressed images, expanded images, and compression and expansion within a single field. The invention provides image stabilization in a purely electronic manner without the need for any moving parts that would typically require control hardware and a significant amount of space. In addition, since LOS motion compensation takes place as the image is being sampled, this method eliminates the need for the large amounts of memory required to store a field of video as well as LOS information for post processing.
33 Citations
14 Claims
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1. An image stabilization system comprising:
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first means mounted on a platform for sampling an image in response to timing control signals and outputting a plurality of imaging signals in response thereto;
second means for detecting vibration of said platform and providing a signal in response thereto; and
third means responsive to said second means for adjusting said timing control signals to cause said first means to sample said image and thereby compensate for an effect of vibration on said imaging signals, said third means including means for compensating for vibration which causes compressed images. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An image stabilization system comprising:
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an image sampling circuit mounted on a platform for sampling an image in response to timing control signals and outputting a plurality of imaging signals in response thereto;
an azimuth resolver for detecting vibration of said platform and providing a signal in response thereto; and
a microprocessor responsive to said resolver for adjusting said timing control signals to cause said image sampling circuit to sample said image and thereby compensate for an effect of vibration on said imaging signals, said microprocessor including software for compensating for vibration which causes compressed images. - View Dependent Claims (8, 9, 10, 11, 12)
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13. An image stabilization system comprising:
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first means mounted on a platform for sampling an image in response to timing control signals and outputting a plurality of imaging signals in response thereto;
second means for detecting vibration of said platform and providing a signal in response thereto; and
third means responsive to said second means for adjusting said timing control signals to cause said first means to sample said image and thereby compensate for an effect of vibration on said imaging signals, said third means including means for compensating for vibration which causes compression and expansion within a field of imagery.
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14. An image stabilization system comprising:
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an image sampling circuit mounted on a platform for sampling an image in response to timing control signals and outputting a plurality of imaging signals in response thereto;
an azimuth resolver for detecting vibration of said platform and providing a signal in response thereto; and
a microprocessor responsive to said resolver for adjusting said timing control signals to cause said image sampling circuit to sample said image and thereby compensate for an effect of vibration on said imaging signals, said microprocessor including software for compensating for vibration which causes compression and expansion within a field of imagery.
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Specification