Method and device for correcting defective pixel of image

A correction method and dead point technology, which is applied in the field of image processing, can solve the problem of low precision of dead point correction, and achieve the effect of improving precision and accuracy

Inactive Publication Date: 2018-03-13
ZHEJIANG DAHUA TECH
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Problems solved by technology

[0004] Embodiments of the present invention provide a method and device for correcting dead pix

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  • Method and device for correcting defective pixel of image
  • Method and device for correcting defective pixel of image
  • Method and device for correcting defective pixel of image

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[0077] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part 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 those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0078] The embodiments of the present invention provide a method and device for correcting image dead pixels, which are used to solve the problem of low accuracy of bad pixel correction in the prior art. Among them, the method and the device are based on the same inventive concept. Since the principles of the method and the device to solve the problem are similar, the implementation of the device and the method can be referred to each other,...

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Abstract

The invention discloses a method and a device for correcting a defective pixel of an image, which are used for solving a problem of lower correction precision of the defective pixel in the prior art.The method specifically comprises the following steps that electronic equipment establishes an N*N pixel matrix by taking the fth pixel point in an image to be detected as a central pixel point, wherein f is a positive integer which is not larger than the total number of the pixel points in the image to be detected; the electronic equipment respectively converts the colors of the pixel points of an inner ring and an outer ring into the color of the central pixel point, and respectively determines pixel values after each pixel point is converted; and the electronic device determines the centralpixel point as the defective pixel based on the pixel value after each pixel point is converted, and corrects the central pixel point.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a method and device for correcting dead pixels in an image. Background technique [0002] Due to the limitations of the image sensor manufacturing process, the image sensor will collect more and more dead pixels in the image collected under a long-term and high-temperature environment, resulting in a decrease in the quality of the collected image. Dead pixels refer to pixels that do not change with light sensitivity and always present one color (such as white, black or color), thus destroying the clarity and integrity of high-definition images. [0003] Currently there are two types of dead point correction technology: static dead point correction and dynamic dead point correction. Static dead point correction is to predetermine the bad point position, record the bad point position in the memory, and perform dead point correction when the pixel at this position is proce...

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Application Information

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IPC IPC(8): H04N5/367H04N17/00
CPCH04N17/002H04N25/683
Inventor 凌晨张旦马鑫方伟
Owner ZHEJIANG DAHUA TECH
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