基于小波变换的图像融合代码，低频小波系数加权平均，高频取绝对值较大融合策略

----小波变换后使用最简单融合规则，效果一般，比空域直接融合稍微好点-Image fusion based on wavelet transform code, weighted average of the low frequency wavelet coefficient, high frequency take absolute value is larger fusion strategy

- use the most simple fusion rules after wavelet transform, effect, direct fusion is slightly better than the airspace