Image real-time defogging method based on graphics processor

A graphics processor and image technology, applied in the field of image processing, can solve the problems that GPU computing does not fully exploit data reusability, cannot achieve fast processing, and is difficult to achieve real-time processing, so as to improve data access speed, overcome the impact of interruption, The effect of reducing the amount of calculation

Active Publication Date: 2016-10-12
XIDIAN UNIV
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Problems solved by technology

The disadvantage of this method is that the parallelism of the whole implementation scheme is not enough, some processes still use the CPU for serial processing, the GPU calculation part does not fully exploit the reusability of data, and does not use high-speed memory such as texture storage and shared storage to access data The mode is optimized so...

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  • Image real-time defogging method based on graphics processor
  • Image real-time defogging method based on graphics processor
  • Image real-time defogging method based on graphics processor

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Embodiment Construction

[0035] Attached below figure 1 The present invention is further described.

[0036] Step 1. Initialize the computer.

[0037] Connect the graphics processing unit GPU to the computer, the graphics processing unit GPU refers to the Tesla-C2075 graphics processing unit GPU hardware architecture;

[0038] The computer allocates three storage spaces, shared memory, texture memory and global memory for the graphics processor GPU, which are used to store the data when the graphics processor GPU performs parallel computing. These data include the image data of the input fog map and the image data of the output clear image. And the intermediate results output by each kernel function.

[0039] Step 2, input the fog map I and read the image data.

[0040]Input the fog image I into the computer memory and read its image data, convert the integer data to floating point data and store it in the global memory.

[0041] Step 3, calculate the dark channel map I of the input fog map I dar...

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Abstract

The invention discloses an image real-time defogging method based on a graphics processor, mainly solving the problem that in the prior art, a computer CPU (Central Processing Unit) has a slow processing speed, and is not suitable for performing real-time defogging on high-definition images. The method comprises the steps of: 1, initializing a computer, inputting a fogging image and reading image data; 2, calculating a dark channel image for inputting the fogging image; 3, calculating a airglow value according to the dark channel image; 4, calculating the initial transmissivity image for inputting the fogging image; 5, guiding the initial transmissivity image to be filtered to obtain a final transmissivity image; and 6, restoring a photographic field according to the final transmissivity image, and outputting a clear and defogged image. The method can guarantee better defogging effects, has a fast processing speed, meets the real-time defogging requirement of a 10180p image, and can be used for high-definition image real-time defogging processing.

Description

technical field [0001] The invention belongs to the technical field of image processing, and further relates to a real-time image dehazing method, which can be used in the fields of outdoor target recognition and tracking, road visual monitoring, satellite remote sensing monitoring and the like. Background technique [0002] The generation of fog map is mainly due to the scattering effect of turbid media such as fog and water vapor in the atmosphere, which seriously attenuates the light intensity received by the camera. Therefore, in order to ensure the clarity of the image and the identifiability of the information, and to correct the color shift of the image due to atmospheric light, the image dehazing algorithm is usually used to process the haze image. The image dehazing algorithm based on the dark channel prior physically dehazes the image, and the effect is obvious and natural, so it is widely used in the field of image dehazing. [0003] However, due to the high comp...

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Application Information

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IPC IPC(8): G06T5/00
CPCG06T5/003G06T2207/10016G06T2207/10024G06T2207/20024
Inventor 吴宪云王茹李云松雷杰王柯俨刘凯
Owner XIDIAN UNIV
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