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Image stain detection method, device and equipment

A stain detection and image technology, applied in the field of image processing, can solve problems such as prone to misjudgment

Active Publication Date: 2020-12-01
GOERTEK OPTICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in practical applications, since the image captured by the camera module presents a radially darkening circle from the center to the edge, it is easy to misjudgment by using this method of regional comparison.

Method used

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  • Image stain detection method, device and equipment
  • Image stain detection method, device and equipment
  • Image stain detection method, device and equipment

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Embodiment Construction

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0025] Terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the conte...

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Abstract

The embodiment of the invention provides an image stain detection method, a device and a device. The method comprises the following steps: obtaining a gray-scale image through the image; Marking a rowindex number of a row and / or a column index number of a column in which a pixel point is located based on the gray-scale image; Determining a frequency magnitude of pixel points in a corresponding row and / or column based on a frequency domain according to the row index number and / or the column index number; Based on a preset frequency magnitude threshold, it is determined whether or not the imagehas a stain. By analyzing the gray values of pixels in each row and / or column of the gray image in frequency domain, it is possible to accurately and quickly determine whether the image contains stains or not.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to an image stain detection method, device and equipment. Background technique [0002] With the popularity of image acquisition devices, more and more electronic devices are equipped with camera modules for image acquisition. In the actual production process, whether there is stain in the captured image is a necessary inspection process. [0003] In the prior art, manual detection can be used, but due to the small size and light color of some stains, it is difficult for the staff to distinguish with naked eyes, and the problem of misjudgment may occur. It can also be detected by equipment, such as dividing the image captured by the module into multiple small areas evenly, and then comparing two adjacent areas. If the difference obtained after the comparison is greater than the threshold, it is considered that there is a stain. However, in practical applications, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00G06T5/10
CPCG06T5/10G06T7/0002G06T2207/10004G06T2207/20056G06T2207/30168
Inventor 王倩宋林东
Owner GOERTEK OPTICAL TECH CO LTD