Ink use amount evaluation apparatus and method, and inkjet apparatus

Patent metadata

Field	Value
Publication number	US-8941876-B2
Application number	US-201213682461-A
Country	US
Kind code	B2
Filing date	Nov 20, 2012
Priority date	Nov 22, 2011
Publication date	Jan 27, 2015
Grant date	Jan 27, 2015

Abstract

When image is formed by a liquid ejection head, input image data is subjected to conversion processing including tone conversion using a first look-up table (LUT) and density correction or non-uniformity correction in nozzle units using second LUTs. Ink use amount in image formation is predicted from reduced image data which is generated from the input image data. In this, the calculation is made more efficient by applying a third LUT which is compiled according to requirements from the second LUTs, to the reduced image data, rather than using the second LUTs directly. Since the image conversion processing is carried out which combines the first LUT for tone conversion and the third LUT corresponding to the non-uniformity correction, and the ink amount distribution data is calculated from the reduced image data after the conversion, then it is possible to ascertain an accurate ink amount which reflects the image adjustment conditions.

First claim

What is claimed is:

1. An ink use amount evaluation apparatus, comprising:
an image input device configured to receive original image data;
an image reduction processing device which is configured to generate reduced image data from the original image data, the reduced image data having a resolution lower than a resolution of the original image data;
a first look-up table storage device which is configured to store a first look-up table specifying an input/output relationship…

Assignees

• Fujifilm Corp

Inventors

• Tamagawa Kiyomi

Classifications

• H04N1/605 Primary

  Electricity · mapped topic

• B41J2/17566

  Operations & Transport · mapped topic

• G06K15/02 Primary

  Physics · mapped topic