The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 15, 1994
Filed:
Oct. 07, 1991
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An image forming device which perform tone reproduction of a by changing the size of dots according to input image data comprising a plurality of pixels, each of which has an image density. A block partitioning portion partitions the input image data into blocks, each which has a predetermined number of pixels and each of the pixels having a predetermined position within each of the blocks. A tone modulation portion determines priorities corresponding to predetermined positions of the pixels within each of the blocks and changes the size of the dots according to the image densities of the pixels within the block. The tone modulation portion increases the size of the dots corresponding to the pixels in such a manner that the size of one of the dots corresponding to one of the pixels is larger than that of another one of the dots corresponding to another one of the pixels having a lower priority than one of the pixels but having the same image density. The degradation of resolution and moire effects are avoided.