Abstract
For the complex and changeable recording scene and lighting condition, which makes images uneven in light and short of contrast ratio, a linear transform image enhancement method based on HSV color space transform is proposed to improve the image quality. In order to maintain the image color invariant, firstly conversing the traditional RGB color space to HSV color space, then analyzing the relationship of S and V components between the HSV color space model and license plate colors, calculating linear factor and in making use of the relationship between the components, α and γ adjusting the coefficients, finally conversing the HSV model parameters to RGB space. The experimental results show that, compared with the bidirectional histogram equalization method and the Retinex method, the proposed method can be effectively used in the image enhancement for driving recorder, not only enhanced in contrast and bright of the license plate region, and has the strong realtime processing capability.
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Zhang, M., Zou, F., Zheng, J. (2017). The Linear Transformation Image Enhancement Algorithm Based on HSV Color Space. In: Pan, JS., Tsai, PW., Huang, HC. (eds) Advances in Intelligent Information Hiding and Multimedia Signal Processing. Smart Innovation, Systems and Technologies, vol 64. Springer, Cham. https://doi.org/10.1007/978-3-319-50212-0_3
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DOI: https://doi.org/10.1007/978-3-319-50212-0_3
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