Graphic processing unit (GPU)-based low-luminance image enhancement method

An image enhancement and low-illumination technology, applied in the field of Internet communication, can solve the problems of high-quality and efficient completion of processing tasks, achieve the effect of improving algorithm efficiency, ensuring processing efficiency, and avoiding frequent transmission

Active Publication Date: 2013-07-17
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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Problems solved by technology

On the other hand, with the development of technology, the resolution of the collected images continues to increase, and the problem of image enhancement is often faced with massive data,...

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  • Graphic processing unit (GPU)-based low-luminance image enhancement method
  • Graphic processing unit (GPU)-based low-luminance image enhancement method
  • Graphic processing unit (GPU)-based low-luminance image enhancement method

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Embodiment Construction

[0026] 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 what is described here is only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0027] figure 1 It is a method flow chart of the GPU-based low-illuminance image enhancement method provided by the embodiment of the present invention. For the convenience of description, only the parts related to the embodiment of the present invention are shown.

[0028] The RGB color image used in this embodiment has an image size of 600×398 pixels and a bit depth of 24 bits.

[0029] Test pla...

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Abstract

The invention is suitable for the field of internet communication, and discloses a graphic processing unit (GPU)-based low-luminance image enhancement method. According to the method, a model is programmed by using a compute unified device architecture (CUDA). The method comprises the following steps of: acquiring red green blue (RGB) channel data of an original image and size information of the original image; initializing a GPU, namely determining the thread number of executing a Kernel function according to the size of the original image; starting the Kernel function to solve a luminance component of the original image, and performing image enhancement processing on the original luminance component, wherein the luminance component processing comprises the non-linear modulation and contrast enhancement of the luminance component; starting the Kernel function, restoring the color of the image, returning a calculation result to a central processing unit (CPU) end, and saving as a picture; and releasing a GPU video memory. By the method, the self-adaption regulation of the image luminance is realized, and the contrast enhancement is performed by a high-dimensional space image geometric method, so that a halation phenomenon is avoided; and particularly, acceleration is performed by using the GPU, so that the processing speed is improved effectively.

Description

technical field [0001] The invention belongs to the field of Internet communication, and in particular relates to a GPU-based low-illuminance image enhancement method. Background technique [0002] Image enhancement is an important technical field in digital image processing. Since the image acquisition process is easily affected by the external environment, such as night, fog or rainy days, the image quality will be greatly reduced. Therefore, the purpose of image enhancement is to adjust the dynamic range of the image, increase the contrast of the image to highlight the details of the image, and improve the visual quality of the image, thereby providing information assurance for intelligent monitoring, aerospace and other fields. [0003] Image enhancement based on histogram adjustment is widely used as a classic algorithm, such as histogram equalization and histogram matching. Although the image enhancement based on histogram can improve the contrast between the bright a...

Claims

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Application Information

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IPC IPC(8): G06T5/00G06T1/00
Inventor 李达肖泉
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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