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A Digital Image Dehazing Method Based on Illumination Separation Model

A technology of separation of digital images and illumination, applied in image enhancement, image data processing, instruments, etc., can solve problems such as information loss, and achieve the effect of improving image contrast and reducing image grayscale range.

Active Publication Date: 2019-06-07
上海本趣网络科技有限公司
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Problems solved by technology

[0004] The present invention provides a digital image defogging method based on the illumination separation model for the deficiencies of the prior art, which can effectively improve the contrast of the fogged image, highlight the details of the image, and improve the visual effect of the image in the existing method. At the same time, there is a problem of loss of information in the highlighted part

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  • A Digital Image Dehazing Method Based on Illumination Separation Model
  • A Digital Image Dehazing Method Based on Illumination Separation Model

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with drawings and embodiments.

[0021] A digital image defogging method based on an illumination separation model, the steps are as follows:

[0022] (1) Obtain the original atomized image;

[0023] (2) The gray scale of the image is synthesized by the illumination component and the reflection component. The reflection component reflects the image content and changes rapidly in space with different image details. Irradiation components are usually of a slowly varying nature in space. The spectrum of the irradiation component falls in the low-frequency region of space, and the spectrum of the reflection component falls in the high-frequency region of space. The original atomized image is subjected to homomorphic filtering to obtain the illumination component; the original atomized image is subjected to homomorphic filtering to obtain the illumination component, which can be expressed as:

[0024] A...

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Abstract

The invention discloses a digital image defogging method based on an illumination separating model, belongs to the technical field of digital image defogging methods, and helps to solve the problem of a conventional method that information of protruding portions is lost. The method is capable of effectively increasing the contrast of a foggy image, highlighting details of the image and improving the visual effect of the image. The method includes the steps: (1) obtaining an original foggy image; (2) conducting homomorphic filtering on the original foggy image, and obtaining an illumination component; (3) calculating a reflection component in the original foggy image after the illumination component is obtained; and (4) obtaining a final image by multiplying the illumination component obtained in the step (2) by the reflection component obtained in the step (3). The method is used for defogging digital images.

Description

technical field [0001] A digital image defogging method based on an illumination separation model is used for digital image defogging processing, and belongs to the technical field of digital image defogging methods. Background technique [0002] Images of outdoor scenes are usually degraded by turbid media (such as molecules, water droplets, etc.) in the atmosphere. Fog, mist, and vapor are all caused by atmospheric absorption or scattering. The light reflected from the scene received by the camera has been attenuated. In addition, the obtained light is also mixed with atmospheric light (light from the surrounding environment reflected by atmospheric molecules). Degraded images have reduced contrast and color fidelity, resulting in a blurry phenomenon known as image fogging. In the case of fogging, due to the reduced visibility of the scene, the features such as the contrast and color of the target in the image are weakened, and the clarity and realism of the image are red...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00
Inventor 张岱齐弘文
Owner 上海本趣网络科技有限公司
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