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Method and device for calibrating image sensor

An image sensor and image technology, applied in the field of image processing, can solve the problems of low calibration accuracy, horizontal and vertical light and dark stripes in the image, etc., and achieve the effect of improving calibration accuracy and reducing light and dark stripes

Active Publication Date: 2018-03-23
ゼジャンハーレイテクノロジーカンパニーリミテッド
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Problems solved by technology

[0005] The present invention provides a method and device for image sensor calibration, which is used to solve the problem of horizontal and vertical light and dark stripes in the calibrated image when the existing flat-field calibration algorithm is used to calibrate the brightness response consistency of the image sensor. , the problem of low calibration accuracy

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  • Method and device for calibrating image sensor
  • Method and device for calibrating image sensor
  • Method and device for calibrating image sensor

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[0068] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0069] The present invention provides a method and device for calibrating an image sensor. According to the method, the calibration coefficient in the row direction in the horizontal direction and the calibration coefficient in the column direction in the vertical direction can be considered in the process of determining the target calibration coefficient of a pixel. When the determined target calibration coefficient calibrates the brigh...

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Abstract

The invention discloses a method and a device for calibrating an image sensor, wherein the problems in the prior art that an existing flat-field calibration algorithm leads to the generation of horizontal and vertical bright and dark strips on a calibrated image and the calibration precision is influenced can be solved. The method comprises the steps of determining a row direction calibration coefficient and a column direction calibration coefficient of an image sensor, and determining a target calibration coefficient according to the row direction calibration coefficient and the column direction calibration coefficient. In this way, light and dark stripes in the horizontal direction and the vertical direction existing in the calibrated image can be reduced. The calibration precision can be improved.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a method and device for calibrating an image sensor. Background technique [0002] In the process of image acquisition by the image sensor, due to the process error, design error and analog-to-digital conversion error of the image sensor, etc., the image sensor will have inconsistent response to the brightness of each pixel when capturing the image, for example When the image sensor shoots an object when the light brightness is uniform, the brightness of each pixel in the image will be inconsistent, resulting in uneven brightness and darkness of the image, which will affect the imaging accuracy. In fields such as high-end industrial image sensors that require high imaging accuracy, due to the existence of the above problems, it is necessary to perform consistent calibration of the brightness responses of different pixels in the image captured by the image sensor. [000...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N17/00
CPCH04N17/002
Inventor 王宗苗李铭
Owner ゼジャンハーレイテクノロジーカンパニーリミテッド