Video camera with electronic picture stabilizer
First Claim
1. A video camera, comprising:
- portion motion vector detecting means for detecting a portion motion vector of each of a plurality of detection areas formed in an image field;
valid detection area determining means for determining whether or not each of the detection areas is a valid detection area through determination whether or not each of the portion motion vectors is effective for detecting an unintentional motion of the camera; and
whole motion vector detecting means for detecting a whole motion vector in accordance with methods different from each other in accordance with the number of the valid detection area determined by said valid detection area determining means,wherein said whole motion vector detecting means comprises;
first dispersion calculating means for obtaining a first dispersion on the basis of the respective portion motion vectors;
selection means for selecting the arbitrary number of the first dispersions having smaller values; and
first detecting means for detecting the whole motion vector on the basis of the portion motion vectors of the detection areas corresponding to the selected first dispersions.
1 Assignment
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Accused Products
Abstract
A video camera including a motion detecting circuit in which correlative values of pixels at a present field are evaluated through the comparison of an image signal of a last field and an image signal of the present field. In the motion detecting circuit, an average correlative value and a minimum correlative value are further evaluated. A microcomputer determines whether or not these correlative values satisfy predetermined conditions for each of detection areas defined within an image field. A detection area which satisfies all the predetermined conditions becomes a valid detection area. A whole motion vector is detected by methods different from each other according to the number of the valid detection areas.
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Citations
19 Claims
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1. A video camera, comprising:
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portion motion vector detecting means for detecting a portion motion vector of each of a plurality of detection areas formed in an image field; valid detection area determining means for determining whether or not each of the detection areas is a valid detection area through determination whether or not each of the portion motion vectors is effective for detecting an unintentional motion of the camera; and whole motion vector detecting means for detecting a whole motion vector in accordance with methods different from each other in accordance with the number of the valid detection area determined by said valid detection area determining means, wherein said whole motion vector detecting means comprises; first dispersion calculating means for obtaining a first dispersion on the basis of the respective portion motion vectors; selection means for selecting the arbitrary number of the first dispersions having smaller values; and first detecting means for detecting the whole motion vector on the basis of the portion motion vectors of the detection areas corresponding to the selected first dispersions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification