中文摘要：

首先介绍了多分形理论和多分形谱的计算方法，然后定义了谱线之间的距离，最后计算了目标伪装前后与背景在多分形特征上的差异，结果表明定义的距离是合理的，能够有效计算谱线之间的差异，而且多分形分析用于伪装效果评价是可行的。谱线的差异越大，说明伪装效果越差，反之，说明伪装效果好。

英文摘要：

Multifractal theory and method of caculating multifractal spectrum is briefly introduced. Then distance between two multifractal spectrum is defined. At last the multifractal difference between background and target when camouflage is carried into execution and not. Result indicates that the distance defined is rational, it can compute the difference between two multifractal spectrum availably and using the method in infrared camouflage effect evaluation is feasible. The difference between two spectrum is more visible, the camouflage effect is worse. Contrarily, the effect is better.