matlab、图像融合、评价指标 avg=num2str(avg_gradient(data.F));%平均梯度 ein=num2str(edge_intensity(data.F));%边缘强度 sha=num2str(shannon(data.F));%信息熵 [img_mean,img_var]=variance(data.F);%灰度均值，标准差(均方差MSE) gray_mean=num2str(img_mean); vari=num2str(i