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Image enhancement method and image enhancement system

An image enhancement and image technology, applied in the field of image processing, can solve the problems of blurred images, poor image quality of people inside the car, inconvenient forensics and decision making, etc., to achieve the effect of natural picture, strong sense of hierarchy and clear contrast.

Active Publication Date: 2012-05-30
QINGDAO HISENSE TRANS TECH
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Problems solved by technology

[0006] Therefore, although under the effect of the auxiliary light source, the current bayonet system and electronic police can clearly capture the license plate part of the vehicle and can be used for license plate recognition, but the image quality of the part involving the people inside the car is still relatively poor. The image is fuzzy and cannot provide more valuable information and details, making it difficult to obtain evidence and make decisions

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  • Image enhancement method and image enhancement system
  • Image enhancement method and image enhancement system
  • Image enhancement method and image enhancement system

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Embodiment Construction

[0038] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0039] The contrast stretching method can be used to deal with poor contrast and blurred images, but the images after contrast stretching often appear unnatural and difficult to restore the original scene, and further processing is required on the stretched images. Moreover, since the same image acquisition device can acquire daytime images and nighttime images, and daytime and nighttime correspond to different light intensities, different contrast stretching parameters need to be used to stretch the images respectively. Therefore, the present invention stretches the contrast to different degrees according to the gray value of the image, and fuses the stretched image with the original image, so as to obtain an image with clearer contrast, stronger sense of hierarchy, and more natural picture. Realize image e...

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Abstract

The invention discloses an image enhancement method and an image enhancement system. The image enhancement method comprises the following steps of: changing an original image from RGB space into grayscale space to acquire a grayscale image corresponding to the original image; calculating the grayscale average value of the grayscale image, and comparing the grayscale average value with a preset threshold value and acquiring grayscale comparison result; performing contrast stretching on the original images, wherein contrast stretching parameters are determined by the grayscale comparison results; and performing image merging on images of which the contrast is stretched and the original images to acquire enhanced images. The images with poor contrast are processed by utilizing the image enhancement method to provide the images which have the clear contrast and contain much detail information for users.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to an image enhancement method and system. Background technique [0002] With the acceleration of my country's urbanization process and the increase in car ownership, traffic conditions such as traffic congestion and traffic safety have increasingly become serious problems faced by countries. Intelligent transportation system has become the first choice to solve these problems, such as the use of intelligent transportation system to realize the detection of traffic flow, adaptive control of signals, etc. Among them, various products based on vision technology have become the focus of attention in recent years, and it is also one of the development trends of the future intelligent transportation industry. Among the products based on vision technology, bayonet system and electronic police are the most representative. They play an increasingly important role in tr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/50
Inventor 卜庆凯朱中邵明欣
Owner QINGDAO HISENSE TRANS TECH
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