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中文摘要：
在图像处理中，光照始终是影响图像质量的重要因素。为了有效弱化光照对图像质量的影响，利用非线性函数叠加的方法构造了一个合理的Gamma值变化曲线，使Gamma矫正方法充分适应了图像中光照变化的实际情况，并有效防止了Gamma矫正可能产生的图像失真。实验证明该方法在改善图像光照条件、提高图像质量方面具有良好的性能。
英文摘要：
Illumination always affects image quality seriously in practice, and no effective methods have been found to solve this problem up-to-date. To weaken illumination effect on image quality, this paper presents an effective Gamma correction method whose Gamma values are determined by three non-linear functions. This makes the proposed Gamma correction method more suitable to illumination changes besides effectively preventing possible corrected image distortion. Experimental results demonstrate that the proposed method performs better in readjusting image illumination condition and improving image quality.
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