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Real-time image mist elimination device and method

A technology of real-time images and image sequences, applied in image enhancement, image data processing, instruments, etc., can solve the problems of complex models and large amount of calculations, improve image quality, enhance local contrast and global contrast, and increase image reliability. The effect of obtaining information

Active Publication Date: 2013-06-19
SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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Problems solved by technology

[0003] Aiming at the deficiencies in existing defogging algorithms, such as complex models, large amount of calculation, and inability to realize real-time processing on hardware, the technical problem to be solved in the present invention is to develop an image enhancement algorithm on a real-time device,

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Embodiment Construction

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0030] The real-time image defogging device proposed by the present invention is based on FPGA technology and applies Retinex image enhancement algorithm. The image is input through the video input interface. According to the type of the input image, the video image is stored in the DPRAM, and the fast Retinex algorithm is applied to the FPGA to process the image, and the processed image is output through the encoding chip.

[0031] The image defogging device of the present invention mainly refers to an image defogging processing board integrating a video input and output interface, a video stream decoding module, a video stream encoding output module, an FPGA module, a DPRAM module, and a power supply module, wherein the video input and output The interface is used for external analog video stream input and output electrical interface, the vi...

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Abstract

The invention relates to an image mist elimination device and a method, in particular to a real-time image enhancing device and a method aiming at image mist and haze elimination under a lower contrast ration condition of a mist condition or a haze condition. The real-time image enhancing device comprises a decoder, a field programmable gate array (FPGA), a storage and an encoder, wherein the decoder is used for decoding video signals and converting the video signals into an image sequence, the FPGA is used for carrying out an enhancement process of a fast Retinex algorithm on the image sequence, the storage is used for storing the image sequence, and the encoder is used for converting the image sequence on which the enhancing process is carried out into the video signals. According to the real-time image enhancing device and the method, large calculating resources and large data storage capacity are not needed, effects of mist and haze elimination can be met, video image details in mist and haze days are enhanced, image visual quality is improved, the requirement of real-time process of hardware can be met at the same time, initial delay is smaller than 40 milliseconds, and original video frame rate is not affected.

Description

technical field [0001] The present invention relates to an image defogging device and method, in particular to a real-time image enhancement device and method for enhancing image details under fog or haze and low contrast conditions. Background technique [0002] The Retinex algorithm is a new algorithm that has developed rapidly in the field of image enhancement in recent years. For low-contrast images, this algorithm can achieve contrast enhancement, dynamic range compression, and color constancy. This algorithm has been widely used abroad. The basic content of the Retinex theory is: an image is composed of an illumination component and a reflection component, the former determines the dynamic range of the image, and the latter determines the intrinsic properties of the object. The Retinex theory is to obtain the reflective properties of the object from the image, that is, to get the original face of the object regardless of the influence of the illumination component, so ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
Inventor 赵怀慈郝明国刘海峥赵春阳崔云刚石天立马渊王帅
Owner SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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