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中文摘要：
针对图像拼接检测问题，该文提出一种基于广义判决分析（GDA）的最优类色度通道设计方法。将最优类色度通道的设计建模为一个以GDA识别力为目标函数，以类色度通道参数范围为约束条件的最优化问题，通过网格搜索和梯度上升法求解最优类色度通道参数。在哥伦比亚图像拼接检测评估库中的实验结果显示，目前4种主流的图像拼接检测方法在最优类色度通道上的识别率均高于已有的颜色通道，验证了该方法的通用性和有效性。
英文摘要：
A Generalized Discriminant Analysis （GDA） based method is proposed to find the optimal chroma-like channel for image splicing detection. The channel design scheme is modeled as an optimization problem in which the objective function is the discriminative power of GDA with constraint of coefficients of the chroma-like channel. The optimization problem is resolved by grid searching combined with the gradient ascent algorithm. The results obtained from the experiment in the Columbia Image Splicing Detection Evaluation Dataset show that the detection performance of four current methods in the mainstream with regard to the rate of identification in the most optimal color designed channel is better than that in the existing color channels, which verify the versatility and effectiveness of the Drooosed method.
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