Image date update apparatus
First Claim
1. An image data update apparatus, the apparatus updating image data showing an image including two areas, anti-aliasing being applied to pixels around a boundary between the two areas, the anti-aliasing smoothing change of color on the boundary, the apparatus comprising:
- an image data storage means for storing first image data showing a first image, part of which includes a first component, which has a first area with a predetermined color, the first area separating from each other the first component and a background area of the first component, wherein the anti-aliasing is applied to a pixel around a boundary between the first component and the first area and to a pixel around a boundary between the first area and the background area; and
an image data update means for executing an image data update operation having a first step of generating second image data by changing part corresponding to an area including the first component and the first area in the first image among the first image data stored in the image data storage means while maintaining the anti-aliasing applied to the pixels around the boundary between the first area and the background area.
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Accused Products
Abstract
An image data update apparatus that can highlight a component with maintaining an appearance of an image to which anti-aliasing is applied and with suppressing increase in processing load is provided. When periodically changing a color arrangement of a traffic congestion line bordered using a color of black and displayed on a map image, only a central portion of the traffic congestion line is changed. Each time the color arrangement is changed, anti-aliasing is applied only to a boundary between the central portion and bordering portion but not to a boundary with a background map image.
9 Citations
13 Claims
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1. An image data update apparatus, the apparatus updating image data showing an image including two areas, anti-aliasing being applied to pixels around a boundary between the two areas, the anti-aliasing smoothing change of color on the boundary, the apparatus comprising:
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an image data storage means for storing first image data showing a first image, part of which includes a first component, which has a first area with a predetermined color, the first area separating from each other the first component and a background area of the first component, wherein the anti-aliasing is applied to a pixel around a boundary between the first component and the first area and to a pixel around a boundary between the first area and the background area; and an image data update means for executing an image data update operation having a first step of generating second image data by changing part corresponding to an area including the first component and the first area in the first image among the first image data stored in the image data storage means while maintaining the anti-aliasing applied to the pixels around the boundary between the first area and the background area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for generating a road map image using anti-aliasing to a pixel around a boundary between two areas in a road map for smoothing change of color on the boundary, the method comprising:
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arranging in an image (i) a background area, (ii) an indication area, and (iii) an edge area having a predetermined color, the edge area intervening between the background area and the indication area; applying anti-aliasing to pixels around, of the edge area, an outer boundary and an inner boundary to thereby complete generation of a first image, the outer boundary intervening between the background area and the edge area, the inner boundary intervening between the indication area and the edge area; and updating the first image by changing the indication area with the anti-aliasing having applied to the pixels around the outer boundary unchanged while applying anti-aliasing to pixels around an inner boundary between the background area and the edge area to thereby complete generation of a second image, the inner boundary intervening between the changed indication area and the edge area. - View Dependent Claims (12, 13)
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Specification