Object velocity measuring apparatus and object velocity measuring method
First Claim
1. An object velocity measuring apparatus for measuring an object velocity in a photographic field from a plurality of photographic frames made up of a plurality of pixels, the object velocity measuring apparatus comprising:
- an object area extracting unit configured to extract, as an object area, a set of pixels from which an object has been sensed over at least M (M<
N) of N successive frames including the present frame;
a center-of-gravity computing unit configured to calculate the center-of-gravity position coordinates of the extracted object area in the photographic field; and
a velocity computing unit configured to calculate the object velocity from the movement of the calculated center-of-gravity position coordinates between different frames.
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Abstract
An object velocity measuring apparatus of this invention for measuring an object velocity in a photographic field from a plurality of photographic frames made up of a plurality of pixels comprises an object area extracting unit configured to extract, as an object area, a set of pixels from which an object has been sensed over at least M (M<N) of N successive frames including the present frame, a center-of-gravity computing unit configured to calculate the center-of-gravity position coordinates of the extracted object area in the photographic field, and a velocity computing unit configured to calculate the object velocity from the movement of the calculated center-of-gravity position coordinates between different frames.
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Citations
12 Claims
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1. An object velocity measuring apparatus for measuring an object velocity in a photographic field from a plurality of photographic frames made up of a plurality of pixels, the object velocity measuring apparatus comprising:
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an object area extracting unit configured to extract, as an object area, a set of pixels from which an object has been sensed over at least M (M<
N) of N successive frames including the present frame;
a center-of-gravity computing unit configured to calculate the center-of-gravity position coordinates of the extracted object area in the photographic field; and
a velocity computing unit configured to calculate the object velocity from the movement of the calculated center-of-gravity position coordinates between different frames. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An object velocity measuring method of measuring an object velocity in a photographic field from a plurality of photographic frames made up of a plurality of pixels, the object velocity measuring method comprising:
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a first step of extracting, as an object area, a set of pixels from which an object has been sensed over at least M (M<
N) of N successive frames including the present frame;
a second step of calculating the center-of-gravity position coordinates of the extracted object area in the photographic field; and
a third step of calculating the object velocity from the movement of the calculated center-of-gravity position coordinates between different frames. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification