Method and apparatus for measuring optical density of image printed on medium

An optical density, medium technology, used in measurement devices, printing, character and pattern recognition, etc.

Inactive Publication Date: 2006-08-30
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditionally, additional densitometric devices are used to measure the optical density of images printed on media, which results in undesirably additional costs

Method used

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  • Method and apparatus for measuring optical density of image printed on medium
  • Method and apparatus for measuring optical density of image printed on medium
  • Method and apparatus for measuring optical density of image printed on medium

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Embodiment Construction

[0039] Embodiments of the present invention will now be described more fully with reference to the accompanying drawings, exemplary of the present invention

[0040] Examples are shown in the attached drawings.

[0041] figure 1 is a perspective view showing an image forming apparatus using a method of measuring optical density of an image printed on a medium according to an exemplary embodiment of the present invention. refer to figure 1 , the image forming apparatus includes: a thermal transfer head 100 , an impression roller 110 , a driven roller 120 , a driving roller 130 and a sensor 140 . The operation of this image forming device will refer to Figure 9 described in more detail below.

[0042]The printing method of this image forming apparatus will now be described in detail. The driving roller 130 conveys the medium 150 while being rotated by engaging with a motor (not shown) as a driving source. The driven roller 120 engages with the driving roller 130 with the ...

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PUM

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Abstract

A method and apparatus are provided for measuring the optical density of an image printed on a medium in an image forming apparatus. The method includes the steps of reading reference information from a memory, measuring the amount of light reflected from a medium on which a target image is printed by applying light to the medium, and calculating the optical density of the target image using the reference information and the measured amount of light reflected from the medium. Accordingly, it is possible to precisely measure the optical density of an image printed on the medium without the aid of an additional optical density measurement device and easily reduce differences or variations in the quality of printing between image forming apparatuses.

Description

[0001] This application claims the benefit of Korean Patent Application No. 10-2005-0016177 filed in the Korean Intellectual Property Office on February 25, 2005, which is hereby incorporated by reference. technical field [0002] The present invention relates to a method and an apparatus for measuring the optical density of an image printed on a medium in an image forming apparatus. More particularly, the present invention relates to a method for measuring the optical density of an image printed on a medium by measuring the amount of light reflected from the medium and using the measured amount of light and an equation to calculate the optical density of the image printed on the medium Methods and Equipment. Background technique [0003] Generally, an image forming apparatus converts a document written by a user via an application program or an image photographed by the user into encoded data. Then, the image forming apparatu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/84G01N21/17G06K9/20B41J2/36G06F19/00
CPCB41J2/36A47G9/0223A47G2009/001
Inventor 金亨一姜京杓
Owner SAMSUNG ELECTRONICS CO LTD
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