Image processing machine
AssigneeCanon Kabushiki Kaisha
InventorShinichi Ishida
Life of this patent
Estimating the term…
Abstract
An image processing machine processes image data of a letter document into binary data which are then put through smoothing-out processing, and image data of a photograph document into binary data by a method in which the optical density of a document is retained, in order to provide high-quality, smooth binary images of both letter documents and photograph documents. One memory stores data both for smoothing-out processing in the case of a letter document and for binary-processing in the case of a photograph document. The memory is used selectively for either type of processing. Thus, circuitry for the processing is simplified.
Claims15
An image processing apparatus comprising:
- inputting means for inputting image data;
- first image processing means including binary-processing means for processing the image data provided by said inputting means into binary data by using a predetermined threshold and smoothing means for smoothing out the binary data provided by said binary-processing means;
- second image processing means for processing the image data provided by said inputting means into binary data by using binary processing in which an error between input image data and the binary data is compensated for;
- and
- selecting means for selecting either output from said first image processing means or output from said second image processing means.
An image processing apparatus comprising:
- inputting means for inputting image data;
- first image processing means including binary-processing means for processing the image data provided by said inputting means into binary data by using a predetermined threshold and smoothing means for smoothing out the binary data provided by said binary-processing means;
- second image processing means for processing the image data provided by said inputting means into binary data by using binary processing in which an error between input image data and the binary data is compensated for;
- and
- a memory which is common to said first image processing means and said second image processing means and which is used selectively by said first image processing means or said second image processing means.
Dependencies are inferred from the claim text.