Image processing apparatus, image reading apparatus and image recording apparatus
AssigneeSharp Kabushiki Kaisha
InventorYohichi Shimazawa
Life of this patent
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Abstract
An image processing apparatus for receiving image data composed of a plurality of pixels, extracting an area from an image based on the received data and detecting a type of an image included in the extracted area, includes means for calculating the ratio of pixels having a predetermined pixel value to pixels constituting the area, and detects the type of the image included in the area, based on the calculated ratio of pixels.
Claims16
An image processing apparatus for detecting and distinguishing an image pattern from a plurality of image patterns each of which is configured with a circular area and an inner area arranged in the circular area to have a common image pattern portion and a non-common image pattern portion, comprising:
- a table representing correspondences between the plurality of image patterns and numbers of pixels;
- a rectangular detection window for detecting an arc segment image included in an image, the arc segment image being a segment of the circular area and being the common image pattern portion of the plurality of image patterns:
- and
- a controller capable of performing operations of:
- receiving image data composed of a plurality of pixels;
- detecting the arc segment image included in the image based on the received image data, in comparison with a pixel distribution in the rectangular detection window and the correspondences represented by the table;
- determining plural circular areas having different radiuses, in accordance with the detected arc segment image, each of the plural circular areas being concentric with the circular area;
- calculating numbers of pixels included in each of the determined plural circular areas;
- and
- distinguishing, from the plurality of image patterns, the image pattern included in the received image data on the basis of the calculated numbers of pixels and the correspondences represented by the table.
An image processing apparatus for detecting and distinguishing an image pattern from a plurality of image patterns each of which is configured with a circular area and an inner area arranged in the circular area to have a common image pattern portion and a non-common image pattern portion, comprising:
- a table representing correspondences between the plurality of image patterns and numbers of pixels;
- a rectangular detection window for detecting an arc segment image included in an image, the arc segment image being a segment of the circular area and being the common image pattern portion of the plurality of image patterns;
- and
- means for receiving image data composed of a plurality of pixels;
- means for detecting the arc segment image included in the image based on the received image data, in comparison with a pixel distribution in the rectangular detection window and the correspondences represented by the table;
- means for determining plural circular areas having different radiuses, in accordance with the detected arc segment image, each of the plural circular areas being concentric with the circular area;
- means for calculating numbers of pixels included in each of the determined plural circular areas;
- and
- means for distinguishing, from the plurality of image patterns, the image pattern included in the received image data on the basis of the calculated numbers of pixels and the correspondences represented by the table.
Dependencies are inferred from the claim text.