数字图像处理，通过选择输入参数，生成蛮子扩充函数的P，Q的最小偶数值！-Digital image processing, by selecting the input parameters to generate the expansion of functions Manzi P, Q values even the smallest!

此函数用于计算满足频域滤波中等式所要求的P和Q的最小偶数值。-paddedsize

PADDEDSIZE Computes padded sizes useful for FFT-based filtering