Motion detection apparatus
First Claim
1. A motion detection apparatus, comprising:
- a first detector which detects a motion of a partial scene captured in each of a plurality of blocks allocated to a scene based on image data repeatedly outputted from an imager;
a reducer which reduces a weighted amount allocated to a block in which a partial scene having a contrast below a reference is captured, out of a plurality of weighted amounts respectively allocated to the plurality of blocks;
a second detector which detects a motion of the entire scene by performing a weighted average process in which the plurality of weighted amounts adjusted by a process of said reducer are referenced on the motion detected by said first detector;
a first obtainer which repeatedly obtains a minimum value of a luminance difference between screens of the image data outputted from said imager, corresponding to each of the plurality of blocks; and
an increaser which executes a process for increasing the reference according to an increase of the minimum value obtained by said first obtainer, corresponding to the block in which the partial scene having the contrast below the reference is captured.
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Abstract
A motion detection apparatus includes a CPU. The CPU detects partial motion vectors of an object scene corresponding to motion detection blocks based on raw image data. The CPU also reduces a weighted amount allocated to a motion detection block which captures a partial object scene having a contrast below a reference out of the motion detection blocks. Furthermore, the CPU performs a weighted average process referring to the weighted amount on the partial motion vectors so as to detect a motion of the entire object scene. The CPU obtains a minimum correlation value of a luminance difference between frames of the raw image data corresponding to each of the motion detection blocks, and executes a process for increasing the reference according to an increase of the obtained minimum correlation value corresponding to the motion detection block which captures the partial object scene having a contrast below the reference.
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Citations
9 Claims
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1. A motion detection apparatus, comprising:
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a first detector which detects a motion of a partial scene captured in each of a plurality of blocks allocated to a scene based on image data repeatedly outputted from an imager; a reducer which reduces a weighted amount allocated to a block in which a partial scene having a contrast below a reference is captured, out of a plurality of weighted amounts respectively allocated to the plurality of blocks; a second detector which detects a motion of the entire scene by performing a weighted average process in which the plurality of weighted amounts adjusted by a process of said reducer are referenced on the motion detected by said first detector; a first obtainer which repeatedly obtains a minimum value of a luminance difference between screens of the image data outputted from said imager, corresponding to each of the plurality of blocks; and an increaser which executes a process for increasing the reference according to an increase of the minimum value obtained by said first obtainer, corresponding to the block in which the partial scene having the contrast below the reference is captured. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A computer program embodied in a tangible medium, which is executed by a processor of a motion detection apparatus, said program comprising:
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a first detecting step of detecting a motion of a partial scene captured in each of a plurality of blocks allocated to a scene based on image data repeatedly outputted from an imager; a reducing step of reducing a weighted amount allocated to a block in which a partial scene having a contrast below a reference is captured, out of a plurality of weighted amounts respectively allocated to the plurality of blocks; a second detecting step of detecting a motion of the entire scene by performing a weighted average process in which the plurality of weighted amounts adjusted by a process of said reducing step are referenced on the motion detected in said first detecting step; an acquiring step of repeatedly acquiring a minimum value of a luminance difference between screens of image data outputted from said imager, corresponding to each of the plurality of blocks; and an increasing step of executing a process for increasing the reference according to an increase of the minimum value obtained in said acquiring step, corresponding to the block in which the partial scene having the contrast below the reference is captured.
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9. A motion detection method executed by a motion detection apparatus, comprising:
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a first detecting step of detecting a motion of a partial scene captured in each of a plurality of blocks allocated to a scene based on image data repeatedly outputted from an imager; a reducing step of reducing a weighted amount allocated to a block in which a partial scene having a contrast below a reference is captured, out of a plurality of weighted amounts respectively allocated to the plurality of blocks; a second detecting step of detecting a motion of the entire scene by performing a weighted average process in which the plurality of weighted amounts adjusted by a process of said reducing step are referenced on the motion detected in said first detecting step; an acquiring step of repeatedly acquiring a minimum value of a luminance difference between screens of image data outputted from said imager, corresponding to each of the plurality of blocks; and an increasing step of executing a process for increasing the reference according to an increase of the minimum value obtained in said acquiring step, corresponding to the block in which the partial scene having the contrast below the reference is captured.
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Specification