Image processing with segmentation using directionally-accumulated difference-image pixel values
First Claim
Patent Images
1. A method of identifying a region within a chosen image that is part of an image sequence, the method comprising:
- forming difference-image pixel values from the chosen image and at least one other image in the image sequence;
forming first directionally-accumulated difference-image pixel values by accumulating difference-image pixel values in a first image direction;
forming second directionally-accumulated difference-image pixel values by accumulating difference-image pixel values in a second image direction;
combining the respective co-located first directionally-accumulated difference-image pixel values and the second directionally-accumulated difference-image pixel values to form combined directionally-accumulated difference-image pixel values; and
utilizing the combined directionally-accumulated difference-image pixel values in identifying said region;
further comprising;
forming third directionally-accumulated difference-image pixel values by accumulating difference-image pixel values in a third image direction; and
forming fourth directionally-accumulated difference-image pixel values by accumulating difference-image pixel values in a fourth image direction,wherein the third and fourth directions are opposing.
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Abstract
In the segmentation of an image into spatial regions, an image region is identified by forming difference-image pixel values from the chosen image and at least one other image in the image sequence and accumulating those difference-image pixel values horizontally and vertically. Co-located horizontal and vertical accumulations are combined and utilized in identifying the region. Difference-image pixel values can also be accumulated along other lines which pass through a point of interest.
32 Citations
17 Claims
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1. A method of identifying a region within a chosen image that is part of an image sequence, the method comprising:
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forming difference-image pixel values from the chosen image and at least one other image in the image sequence; forming first directionally-accumulated difference-image pixel values by accumulating difference-image pixel values in a first image direction; forming second directionally-accumulated difference-image pixel values by accumulating difference-image pixel values in a second image direction; combining the respective co-located first directionally-accumulated difference-image pixel values and the second directionally-accumulated difference-image pixel values to form combined directionally-accumulated difference-image pixel values; and utilizing the combined directionally-accumulated difference-image pixel values in identifying said region; further comprising; forming third directionally-accumulated difference-image pixel values by accumulating difference-image pixel values in a third image direction; and forming fourth directionally-accumulated difference-image pixel values by accumulating difference-image pixel values in a fourth image direction, wherein the third and fourth directions are opposing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. Apparatus for identifying a region within a chosen image that is part of an image sequence, comprising:
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a difference-image store for holding difference-image pixel values; a first accumulator forming first directionally-accumulated difference-image pixel values by accumulating difference-image pixel values in a first image direction; a second accumulator forming second directionally-accumulated difference-image pixel values by accumulating difference-image pixel values in a second image direction; and a multiplier forming products of directionally-accumulated difference-image pixel values, wherein co-located pixel values resulting from accumulation in opposing directions are multiplied together. - View Dependent Claims (13, 14, 15)
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16. A non-transitory computer readable medium storing a computer program product having instructions thereon that, when executed, cause one or more programmable apparatuses to implement a method of identifying a region within a chosen image that is part of an image sequence, the method comprising:
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forming difference-image pixel values from the chosen image and at least one other image in the image sequence; forming first directionally-accumulated difference-image pixel values by accumulating difference-image pixel values in a first image direction; forming second directionally-accumulated difference-image pixel values by accumulating difference-image pixel values in a second image direction; combining the respective co-located first directionally-accumulated difference-image pixel values and the second directionally-accumulated difference-image pixel values to form combined directionally-accumulated difference-image pixel values; utilizing the combined directionally-accumulated difference-image pixel values in identifying said region; forming third directionally-accumulated difference-image pixel values by accumulating difference-image pixel values in a third image direction; and forming fourth directionally-accumulated difference-image pixel values by accumulating difference-image pixel values in a fourth image direction, wherein the third and fourth directions are opposing. - View Dependent Claims (17)
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Specification