Image processor
First Claim
Patent Images
1. An image processing apparatus comprising:
- image reading means for reading an image of a document to provide pixel data;
setting means for setting a reduction ratio;
interpolation means for adjusting a density level of the pixel data provided by said image reading means in accordance with the reduction ratio set by said setting means and the density level of the pixel data adjacent to one pixel data to be adjusted;
thinning-out for thinning out the pixel data adjusted by said interpolation means to image data having a size determined by the reduction ratio set by said setting means; and
image forming means for forming an image on a sheet of paper based on the image data after being thinned out by said thinning-out means.
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Abstract
In an image processor, an image of document is read by an image sensor. A reduction ratio of the image is set. Then, interpolation is performed on the image data between a pixel under interest and a pixel adjacent to the pixel under interest according to the reduction ratio. After the interpolation, pixel data in the image data are thinned out to an image data having a size determined by the reduction ratio, and an image is formed on a sheet of paper based on the thined-out data. Because the interpolation is performed before the thinning-out of the image data, defects in a reduced image such as vanishment of a narrow line are reduced, and image quality is improved.
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Citations
12 Claims
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1. An image processing apparatus comprising:
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image reading means for reading an image of a document to provide pixel data; setting means for setting a reduction ratio; interpolation means for adjusting a density level of the pixel data provided by said image reading means in accordance with the reduction ratio set by said setting means and the density level of the pixel data adjacent to one pixel data to be adjusted; thinning-out for thinning out the pixel data adjusted by said interpolation means to image data having a size determined by the reduction ratio set by said setting means; and image forming means for forming an image on a sheet of paper based on the image data after being thinned out by said thinning-out means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification