Target-enhanced fusion method based on YCbCr space

Hanjie Chen; Xinmin Zhou; Guohua Gu; Weixian Qian; Minjie Wan

doi:10.1117/12.2541551

18 December 2019 Target-enhanced fusion method based on YCbCr space

Hanjie Chen, Xinmin Zhou, Guohua Gu, Weixian Qian, Minjie Wan

Proceedings Volume 11338, AOPC 2019: Optical Sensing and Imaging Technology; 113380J (2019) https://doi.org/10.1117/12.2541551
Event: Applied Optics and Photonics China (AOPC2019), 2019, Beijing, China

Abstract

Image fusion is a process of combining complementary information from multiple images of the same scene to generate a composite image. To highlight the thermal target and keep appearance information simultaneously, a target-enhanced fusion method based on YCbCr space is proposed. Firstly, enhancement process is taken in the original infrared image. Three gray images are then obtained via linear computation. Then, color transfer process is accomplished in YCbCr space. Each of the channel' s mean and standard deviation is matched to complete color transfer. Different kinds of reference images are selected to generate different kinds of fusion results. A natural daylight color image is utilized to implement false color fusion, while a reference image with more red components is utilized to implement gray fusion. Besides, parallel acceleration is implemented to improve the practicability of the algorithm. The dynamic memory space allocation problem of Graphics Processing Unit (GPU) is solved by the optimization of multi-dimensional index linearization methods and the algorithm modification for computing statistical parameters. The experiment results of fusion algorithm show that in either mode (color/gray), the proposed method is able to obtain a fused image which pops out enhanced targets, without losing the details of the background. The experiment results of parallel acceleration show that the speedup ratio of an image pair sized around 640×480 is approximately 8, basically realizing real-time process.

Citation Download Citation

Hanjie Chen, Xinmin Zhou, Guohua Gu, Weixian Qian, and Minjie Wan "Target-enhanced fusion method based on YCbCr space", Proc. SPIE 11338, AOPC 2019: Optical Sensing and Imaging Technology, 113380J (18 December 2019); https://doi.org/10.1117/12.2541551

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KEYWORDS

Image fusion

Image processing

Infrared imaging

Image enhancement

Infrared radiation

Visible radiation

Detection and tracking algorithms

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