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Apparatus and method for image registration

A technology for image registration and test pattern, which is applied in the direction of electrical recording technology using charge graphics, image communication, and equipment using electrical recording technology using charge graphics, etc. Accuracy, low density and other issues

Inactive Publication Date: 2006-11-29
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of a black test pattern, correct image registration is achieved with respect to the first reference value, but due to the low density, the black test pattern is not correctly identified with respect to the second reference value
Therefore, if the reference value is fixed, image registration cannot be achieved correctly at low black density

Method used

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  • Apparatus and method for image registration
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  • Apparatus and method for image registration

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Embodiment Construction

[0020] Matters defined in the specification, such as detailed construction and components, are provided to help comprehensive understanding of the embodiments of the present invention. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

[0021] image 3 is a block diagram of an image alignment and registration device according to an exemplary embodiment of the present invention. The image alignment and registration device according to the exemplary embodiment of the present invention includes a detection unit 100 , a reference value setting unit 120 , a comparison unit 130 , a correction unit 140 and an error message alarm unit 150 .

[0022] The detection unit 100 detects the first test pattern of yellow, magenta, c...

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Abstract

An image registration apparatus and method are provided for correcting image alignment errors irrespective of a possible black density loss in an image alignment correction process, in which a sensing unit senses first test patterns and second test patterns of cyan, magenta, yellow, and black, a reference value setting unit sets a reference value using the results of sensing the first test patterns obtained by the sensing unit, a comparing unit compares the reference value set by the reference value setting unit with the results of sensing the second test patterns obtained by the sensing unit; and a correcting unit corrects image alignment according to a comparison result of the comparing unit. Accordingly, the image registration apparatus and method controls the reference value which is compared with sensed voltages corresponding to test patterns.

Description

technical field [0001] The invention relates to an image registration device and method. More particularly, the present invention relates to an image registration apparatus and method for performing accurate image registration without considering possible loss of black density during image registration correction. Background technique [0002] Generally, a color laser image forming device that includes a developing unit and a photosensitive drum and forms an image using a one-scan scheme is called a tandem image forming device. In a tandem imaging device, the black, cyan, magenta, and yellow imaging origins must be aligned to obtain a good quality image. However, due to structural changes of the tandem imaging device during manufacturing or due to long-term use, its imaging start points may be misaligned. This misalignment can be corrected using automatic color registration (ACR) methods. In the ACR method, test patterns of black, cyan, magenta, and yellow are formed on t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/01G03G15/00
CPCH04N1/506G03G15/01G03G2215/0161B65H2801/06G03G2215/00405G03G2215/0158
Inventor 卞盛泽
Owner SAMSUNG ELECTRONICS CO LTD