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Image enhancement method under deep-sea environment

A deep-sea environment and camera technology, applied in the field of image processing, can solve problems such as uneven illumination, and achieve the effect of improving quality and having universal applicability

Active Publication Date: 2018-11-13
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The invention not only establishes the space model of the deep-sea environment, but also considers the limited computing power of the deep-sea equipment, effectively solving the problem of uneven illumination in the deep-sea environment

Method used

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  • Image enhancement method under deep-sea environment
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  • Image enhancement method under deep-sea environment

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0031] On the contrary, the invention covers any alternatives, modifications, equivalent methods and schemes within the spirit and scope of the invention as defined by the claims. Further, in order to make the public have a better understanding of the present invention, some specific details are described in detail in the detailed description of the present invention below. The present invention can be fully understood by those skilled in the art without the description of these detailed parts.

[0032] see figure 1 , is a flow chart of the steps of the image enhancement method in the deep sea en...

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Abstract

The invention discloses an image enhancement method under a deep-sea environment. The method comprises the following steps of establishing a spatial model of a camera, a light source and a target under the deep-sea environment; mapping the established three-dimensional spatial model into a corresponding two-dimensional plane; calculating an angle between the camera and the target in the two-dimensional plane; calculating a distance between the camera and the target in the two-dimensional plane; determining an exposure coefficient; and performing adaptive exposure according to the exposure coefficient to restore a non-uniform illumination image under the deep-sea environment. The invention provides a deep-sea image enhancement method based on the spatial model so as to improve the quality of the non-uniform illumination image shot under the deep-sea environment with the assistance of the artificial light source.

Description

technical field [0001] The invention belongs to the field of image processing and relates to an image enhancement method in a deep sea environment. Background technique [0002] With the development of science and technology, more and more people are exploring the ocean field. However, due to the lack of light in the deep-sea exploration environment, the images taken with the aid of artificial light have problems with non-uniform lighting, such as bright spots and dark areas. These problems not only affect the clarity of observation, but also affect subsequent image processing processes, such as target recognition and tracking, feature point extraction, etc. [0003] In order to overcome the above-mentioned problems, professionals in this field have proposed many methods. These methods are basically classified into direct image enhancement methods and model methods. Direct image enhancement is to directly process images without physical models, such as Retinex-based metho...

Claims

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Application Information

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IPC IPC(8): G06T5/00G06T15/50H04N5/235
CPCG06T15/50H04N23/73G06T5/00
Inventor 刘圆圆胡景李竹盛庆华刘敬彪于海滨
Owner HANGZHOU DIANZI UNIV