Test chart, test chart measurement method, and test chart measurement apparatus

Abstract

A test chart is recorded on a recording medium by means of a line head having a plurality of recording elements by causing the plurality of recording elements to perform recording operation while moving the recording medium and the line head relatively to each other in a relative movement direction. The test chart includes: a line pattern block which includes a plurality of line patterns respectively corresponding to the plurality of recording elements, the plurality of line patterns being arranged at a prescribed interval or above so as to be separated from each other, wherein the plurality of line patterns include reference line patterns arranged on both end regions of the line pattern block, the reference line patterns having line characteristic quantities different from the others of the plurality of line patterns. Also, the invention provides a test chart, measure method and measure device thereof.

Description

technical field [0001] The present invention relates to a test chart and its measuring method, a test chart measuring device and a computer program for causing a computer to measure a test chart, and more particularly to a test chart and a technique for measuring it, suitable for measuring an inkjet recording device Dot characteristics (for example, deposition position, dot diameter, and occurrence of ejection failures and other abnormalities) were recorded for each recording element in the line printhead installed in . Background technique [0002] In an inkjet recording apparatus having a recording head including a plurality of ink ejection ports (nozzles), a problem in image quality arises due to density variations (density inconsistencies) in recorded images due to variations in nozzle ejection characteristics. In the case of a series (shuttle) scanning method in which image recording is performed by moving the recording head through a prescribed printing area multiple t...

AI Technical Summary

Problems solved by technology

Having this type of high-resolution reading mechanism within the printing unit adds cost

[0008] In addition, if a reading device is constituted by connecting together a plurality of line sensors described in Japanese Patent Application Laid-Open Publication No. 2006-284406, it is difficult to ensure relative positional accuracy between the line sensors, and it is difficult to ensure relative positional accuracy with respect to The paper is conveyed accurately in the conveying direction, and this is also a factor that increases manufacturing costs

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