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US 2011/0033117 A1Published application
Image processing apparatus and image processing method
AssigneeCanon Kabushiki Kaisha
InventorNaotsugu Sagawa
Life of this patent
Estimating the term…
Abstract
For each pixel of interest in a local region of an input image, an edge intensity in each of a plurality of predetermined directions is calculated. All directions in which the edge intensities are larger than an average value of the edge intensities are selected. For all pixels of interest in the local region, the edge intensities calculated for each of the selected directions are accumulated and output as an edge feature amount.
Claims6
An image processing apparatus comprising:
- a calculation unit which calculates, for each of pixels of interest in a local region within an input image, an edge intensity in each of a plurality of predetermined directions;
- a selection unit which selects, out of the plurality of directions, all directions in which the edge intensities calculated by the calculation unit satisfy a predetermined condition concerning a statistic of the edge intensity for each of the pixels of interest;
- an accumulation unit which accumulates, for all pixels of interest in the local region, the edge intensities calculated by the calculation unit for each of the directions selected by the selection unit;
- and
- a unit which outputs, as an edge feature amount in the local region, a cumulative edge intensity value for each of the plurality of predetermined directions obtained by the accumulation unit.
2 more elements
An image processing method comprising the steps of:
- calculating, for each of pixels of interest in a local region within an input image, an edge intensity in each of a plurality of predetermined directions;
- selecting, out of the plurality of directions, all directions in which the edge intensities calculated in the calculating step satisfy a predetermined condition concerning a statistic of the edge intensity for each of the pixels of interest;
- accumulating, for all pixels of interest in the local region, the edge intensities calculated in the calculating step for each of the directions selected in the selecting step;
- and
- outputting, as an edge feature amount in the local region, a cumulative edge intensity value for each of the plurality of predetermined directions obtained in the accumulating step.
2 more elements
Dependencies are inferred from the claim text.