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p0208.m
I=imread('wrod213.bmp');
imshow(I);
figure,imshow(~I);
p0209.m
I=imread('testpat1.tif');
imshow(I);
J=filter2([1 2; -1 -2], I);
figure,imshow(J,[]);
p0401.m
I = imread('bacteria.BMP');
BW1 = edge(I,'prewitt',0.04); % 0.04为梯度阈值
figure(1);
imshow(I);
figure(2);
imshow(BW1);
p0407.m
<mark>I</mark>=<mark>i</mark>mread('4-11.jpg');
<mark>I</mark>1=<mark>I</mark>(:,:,1);
<mark>I</mark>2=<mark>I</mark>(:,:,2);
<mark>I</mark>3=<mark>I</mark>(:,:,3);
[y,x,z]=s<mark>i</mark>ze(<mark>I</mark>);
d1=zeros(y,x);
d2=d1;
my<mark>I</mark>=double(<mark>I</mark>);
<mark>I</mark>0=zeros(y,x);
for <mark>i</mark>=1:x
for j=1:y
%欧式聚类
d1(j,<mark>i</mark>)=sqrt((my<mark>I</mark>(j,<mark>i ...
p0409.m
I=imread('circbw.tif');
imshow(I);
SE=strel('rectangle',[40 30]); % 结构定义
J=imopen(I,SE); % 开启运算
figure,imshow(J);
p0402.m
I = imread('bacteria.BMP');
BW1 = edge(I,'log',0.003); % σ=2
imshow(BW1);title('σ=2')
BW1 = edge(I,'log',0.003,3); % σ=3
figure, imshow(BW1);title('σ=3')
p0406.m
I = [ 1 1 1 1 2 3 6 6
1 1 2 1 4 5 6 8
1 1 1 1 10 15 7 7
1 1 1 1 20 25
p0404.m
I=imread('blood1.bmp');
imhist(I); % 观察灰度直方图， 灰度140处有谷，确定阈值T=140
I1=im2bw(I,140/255); % im2bw函数需要将灰度值转换到[0,1]范围内
figure,imshow(I1);
p0408.m
<mark>I</mark>=<mark>i</mark>mread('wrod213.bmp');
<mark>i</mark>mshow(<mark>I</mark>);
<mark>I</mark>=~<mark>I</mark>; % 腐蚀运算对灰度值为1的进行
f<mark>i</mark>gure, <mark>i</mark>mshow(<mark>I</mark>);
SE=strel('square',3); % 定义3×3腐蚀结构元素
J=<mark>i</mark>merode(~<mark>I</mark>,SE);
BW=(~<mark>I</mark>)-J; % 检测边缘
f<mark>i</mark>gure,<mark>i</mark>mshow(BW);
...
p0403.m
I = imread('bacteria.BMP');
imshow(I);
BW1 = edge(I,'canny',0.2);
figure,imshow(BW1);