图像特征提取matlab程序2页.doc

%直接帧间差分，计算阈值并进行二值化处理（效果不好）clc;clear;Im1 = double(imread(lena.TIF); %读取背景图片Im2 = double(imread(lena.TIF); %读取当前图片X Y Z = size(Im2); %当前图片的各维度值DIma = zeros(X,Y); for i = 1:X for j = 1:Y DIma(i,j) =Im1(i,j) - Im2(i,j); %计算过帧间差分值 endendfigure,imshow(uint8(DIma) %显示差分图像title(DIma)med = median(DIma); %计算二值化阈值：差值图像中值mad = abs(mean(DIma) - med); %中值绝对差T = mean(med + 3*1.4826*mad) %