Image processing device, image processing method, and storage medium
First Claim
1. An image processing device for determining the presence or absence of a moving area in a predetermined screen of interest from among a plurality of time series screens, the image processing device comprising:
- score calculating means for calculating a score corresponding to each of a plurality of motion directions of pixels in the predetermined screen of interest, based on pixels present in the motion direction across the plurality of the time series screens so that a plurality of scores are calculated for each pixel;
motion direction calculating means for calculating the motion direction of each pixel in the predetermined screen of interest, by processing the plurality of the motion directions based on the plurality of scores corresponding to the plurality of the motion directions respectively; and
determining means for determining the presence or absence of the moving area based on the motion direction calculated by the motion direction calculating means.
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Abstract
An image processing device for calculating the motion direction of each pixel in a predetermined screen of interest from among a plurality of time series screens. The image processing device includes a score calculator for calculating a score corresponding to each of a plurality of motion directions of each pixel in the predetermined screen of interest, based on pixels present in the motion direction across the plurality of the time series screens, and a motion direction calculator for calculating the motion direction of each pixel in the predetermined screen of interest, by processing the plurality of the motion directions based on the scores corresponding to the plurality of the motion directions. The image processing device thus performs a highly accurate motion direction detection process within a short calculation time.
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Citations
17 Claims
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1. An image processing device for determining the presence or absence of a moving area in a predetermined screen of interest from among a plurality of time series screens, the image processing device comprising:
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score calculating means for calculating a score corresponding to each of a plurality of motion directions of pixels in the predetermined screen of interest, based on pixels present in the motion direction across the plurality of the time series screens so that a plurality of scores are calculated for each pixel;
motion direction calculating means for calculating the motion direction of each pixel in the predetermined screen of interest, by processing the plurality of the motion directions based on the plurality of scores corresponding to the plurality of the motion directions respectively; and
determining means for determining the presence or absence of the moving area based on the motion direction calculated by the motion direction calculating means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An image processing device for determining the presence or absence of a moving area in a predetermined screen of interest from among a plurality of time series screens, the image processing device comprising:
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score calculating means for calculating a score corresponding to each of a plurality of motion directions of pixels in the predetermined screen of interest, based on pixels present in the motion direction across the plurality of the time series screens;
motion direction calculating means for calculating the motion direction of each pixel in the predetermined screen of interest, by processing the plurality of the motion directions based on the scores corresponding to the plurality of the motion directions;
determining means for determining the presence or absence of the moving area based on the motion direction calculated by the motion direction calculating means;
direction setting means for setting the plurality of the motion directions of each pixel in the screen of interest; and
range setting means for setting a range of extraction for extracting the pixels in the plurality of the screens present in the motion direction set by the direction setting means to calculate the score for each motion direction, wherein the score calculating means calculates the score of the motion direction, based on the pixels within the range set by the range setting means, from among the pixels of the plurality of screens present in the motion direction set by the direction setting means, wherein the direction setting means for successively setting the motion directions, comprises;
motion direction memory means for storing the motion direction of each pixel in the screen of interest, and motion direction updating means for updating the motion direction stored in the motion direction memory means with the motion direction newly set by the direction setting means, and wherein the motion direction updating means updates the motion direction stored in the motion direction memory means by forming a weighted sum of the motion direction stored in the motion direction memory means and the motion direction newly set by the direction setting means, with the scores corresponding to the respective motion directions accounted for as the weights therefor.
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16. An image processing method for determining the presence or absence of a moving area in a predetermined screen of interest from among a plurality of time series screens, the image processing method comprising the steps of:
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calculating a score corresponding to each of a plurality of motion directions of pixels in the predetermined screen of interest, based on pixels present in the motion direction across the plurality of the time series screens so that a plurality of scores are calculated for each pixel;
calculating the motion direction of each pixel in the predetermined screen of interest, by processing the plurality of the motion directions based on the plurality of scores corresponding to the plurality of the motion directions respectively; and
determining the presence or absence of the moving area based on the calculated motion direction.
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17. A storage medium for storing a computer executable program for determining the presence or absence of a moving area in a predetermined screen of interest from among a plurality of time series screens, the program comprising the steps of:
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calculating a score corresponding to each of a plurality of motion directions of pixels in the predetermined screen of interest, based on pixels present in the motion direction across the plurality of the time series screens so that a plurality of scores are calculated for each pixel;
calculating the motion direction of each pixel in the predetermined screen of interest, by processing the plurality of the motion directions based on the plurality of scores corresponding to the plurality of the motion directions respectively, and determining the presence or absence of a moving area based on the calculated motion direction.
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Specification