Invention Grant
US07936478B2 Method of printing a compressed image having a bi-level black layer and a contone layer
失效
打印具有双层黑色层和连续色调层的压缩图像的方法
- Patent Title: Method of printing a compressed image having a bi-level black layer and a contone layer
- Patent Title (中): 打印具有双层黑色层和连续色调层的压缩图像的方法
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Application No.: US12139498Application Date: 2008-06-15
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Publication No.: US07936478B2Publication Date: 2011-05-03
- Inventor: Paul Lapstun , Simon Robert Walmsley , Kia Silverbrook
- Applicant: Paul Lapstun , Simon Robert Walmsley , Kia Silverbrook
- Applicant Address: AU Balmain, New South Wales
- Assignee: Silverbrook Research Pty Ltd
- Current Assignee: Silverbrook Research Pty Ltd
- Current Assignee Address: AU Balmain, New South Wales
- Priority: AUPP7024 19981109
- Main IPC: G06F15/00
- IPC: G06F15/00 ; G06K15/00

Abstract:
Provided is a method of printing a compressed image. The method includes the steps of receiving, with a printer controller, the image, having a bi-level black data layer compressed in an Edge Delta and Runlength (EDRL) compression format and a continuous tone (contone) CMYK data layer, from a computer. The method includes the steps of expanding the image by simultaneously decompressing the two data layers in parallel, and halftoning the contone CMYK data layer into bi-level CMYK data layer. Also included are the steps of compositing the bi-level black data layer over the bi-level CMYK data layer to form a composited bi-level CMYK image, transmitting the composited bi-level CMYK image to a memory buffer of pagewidth printer for printing.
Public/Granted literature
- US20080285062A1 Method Of Printing A Compressed Image Having A Bi-Level Black Layer And A Contone Layer Public/Granted day:2008-11-20
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