发明名称 IMAGE PROCESSING APPARATUS PERFORMING HALFTONE PROCESS ON IMAGE DATA
摘要 The present invention provides an image processing apparatus that includes a processor. The processor is configured to calculate a corrected tone value of a target pixel using a tone value of the target pixel and an error value of a previously processed pixel; determine a dot value of the target pixel by comparing the corrected tone value with a threshold value; calculate an error value of the target pixel using the corrected tone value and a first density value when the dot value indicates to form a dot and the dot to be formed is a first dot formed in isolation; and calculate an error value of the target pixel using the corrected tone value and a second density value when the dot value indicates to form a dot and the dot to be formed is a second dot formed at a particular location in consecutive dots.
申请公布号 US2015002905(A1) 申请公布日期 2015.01.01
申请号 US201414317243 申请日期 2014.06.27
申请人 BROTHER KOGYO KABUSHIKI KAISHA 发明人 YOSHIDA Yasunari
分类号 G06K15/02 主分类号 G06K15/02
代理机构 代理人
主权项 1. An image processing apparatus comprising: a processor configured to: perform a halftone process on image data to generate processed image data, the image data including a plurality of tone values of a plurality of pixels, the processed image data including a plurality of dot values of the plurality of pixels, each of the plurality of dot values indicating dot formation status; andsupply the processed image data to a printing execution unit, wherein, to perform the halftone process, the processor is further configured to: calculate a corrected tone value of a target pixel using a tone value of the target pixel and an error value of a previously processed pixel;determine a dot value of the target pixel by comparing the corrected tone value of the target pixel with a threshold value;calculate an error value of the target pixel using the corrected tone value of the target pixel and a first density value when the dot value of the target pixel indicates to form a dot and the dot to be formed corresponding to the dot value of the target pixel is a first dot, the first dot being an isolated dot; andcalculate an error value of the target pixel using the corrected tone value of the target pixel and a second density value when the dot value of the target pixel indicates to form a dot and the dot to be formed corresponding to the dot value of the target pixel is a second dot, the second dot being a dot to be formed at a particular location in consecutive dots.
地址 Nagoya-shi JP