【MATLAB100个实用小技巧】

您所在的位置：网站首页 › MATLAB绘图操作 › 【MATLAB100个实用小技巧】

【MATLAB100个实用小技巧】

2023-01-03 12:58| 来源: 网络整理| 查看: 265

文章目录前言系列文章67. 图像的块操作68. 图形的过滤操作69. 图像的频率操作70. 函数变换71. RADON 函数变换72. 图像分析（1）73. 过滤图像74. 图像的区域处理75. 图像的颜色处置

前言

🌏MATLAB是一个功能强大的软件，我们可以利用MATLAB进行绘图、算法验证、仿真实验等等。在学习MATLAB的过程中，繁多的命令与代码往往容易使我们脑容量过载😭😭😭 请添加图片描述 🌏本系列将总结一些常见的MATLAB编程小技巧😽😽 🌏可能有些地方会有些错误或者是不太完善的，还请大家在评论区直接指出❤️❤️❤️

系列文章

【MATLAB100个实用小技巧】——图形应用(1-10) 【MATLAB100个实用小技巧】——图形应用(11-20) 【MATLAB100个实用小技巧】——图形应用(21-32) 【MATLAB100个实用小技巧】——界面设计(33-43) 【MATLAB100个实用小技巧】——界面设计(44-55) 【MATLAB100个实用小技巧】——界面设计(56-66) 【MATLAB100个实用小技巧】——图形处理(67-75) 【MATLAB100个实用小技巧】——图形处理(76-84) 【MATLAB100个实用小技巧】——数值分析(85-100)

67. 图像的块操作

😉代码

h0=figure('toolbar','none',... 'position',[198 56 350 468],... 'name','实例 67'); h1=axes('parent',h0,... 'position',[0.2 0.45 0.6 0.5],... 'visible','off'); I=imread('tire.tif'); imshow(I); b1=uicontrol('parent',h0,... 'units','points',... 'tag','b1',... 'backgroundcolor',[0.75 0.75 0.75],... 'style','pushbutton',... 'string','边沿操作',... 'position',[30 100 50 20],... 'callback',[... 'cla,',... 'I=imread(''tire.tif'');,',... 'f=inline(''max(x(:))'');,',... 'I2=nlfilter(I,[2 2],f);,',... 'imshow(I2)']); b2=uicontrol('parent',h0,... 'units','points',... 'tag','b2',... 'backgroundcolor',[0.75 0.75 0.75],... 'style','pushbutton',... 'string','显示块操作',... 'position',[100 100 50 20],... 'callback',[... 'cla,',... 'I=imread(''tire.tif'');,',... 'f=inline(''uint8(round(mean2(x)*ones(size(x))))'');,',... 'I2=blkproc(I,[6 6],f);,',... 'imshow(I2)']); b3=uicontrol('parent',h0,... 'units','points',... 'tag','b3',... 'backgroundcolor',[0.75 0.75 0.75],... 'style','pushbutton',... 'string','交叠块操作',... 'position',[170 100 50 20],... 'callback',[... 'cla,',... 'I=imread(''tire.tif'');,',... 'f=inline(''uint8(round(mean2(x)*ones(size(x))))'');,',... 'I2=blkproc(I,[6 6],[3 3],f);,',... 'imshow(I2)']); b4=uicontrol('parent',h0,... 'units','points',... 'tag','b4',... 'backgroundcolor',[0.75 0.75 0.75],... 'style','pushbutton',... 'string','关闭',... 'fontsize',14,... 'position',[90 50 70 30],... 'callback','close');

😊效果在这里插入图片描述

68. 图形的过滤操作

这个可能还有些问题… 😉代码

h0=figure('toolbar','none',... 'position',[198 56 350 468],... 'name','过滤操作'); h1=axes('parent',h0,... 'position',[0.3 0.45 0.5 0.5],... 'visible','off'); I=imread("D:\opencv\JPEGdata\IMG_20210603_185840.jpg"'); imshow(I); b1=uicontrol('parent',h0,... 'units','points',... 'tag','b1',... 'style','pushbutton',... 'backgroundcolor',[0.75 0.75 0.75],... 'string','均平过滤',... 'position',[50 120 50 20],... 'callback',[... 'cla,',... 'I=imread("D:\opencv\JPEGdata\IMG_20210603_185840.jpg");,',... 'h=fspecial(''average'',6);,',... 'I2=uint8(round(filter2(h,I)));,',... 'imshow(I2)']); b2=uicontrol('parent',h0,... 'units','points',... 'tag','b2',... 'style','pushbutton',... 'backgroundcolor',[0.75 0.75 0.75],... 'string','Sobel 过滤',... 'position',[150 120 50 20],... 'callback',[... 'cla,',... 'I=imread("D:\opencv\JPEGdata\IMG_20210603_185840.jpg");,',... 'h=fspecial(''sobel'');,',... 'I2=filter2(h,I);,',... 'imshow(I2,[])']); b1=uicontrol('parent',h0,... 'units','points',... 'tag','b1',... 'style','pushbutton',... 'backgroundcolor',[0.75 0.75 0.75],... 'string','关闭',... 'position',[85 60 80 30],... 'callback','close');

😊效果在这里插入图片描述

69. 图像的频率操作

😉代码

h0=figure('toolbar','none',... 'position',[198 56 350 468],... 'name','频率操作'); h1=axes('parent',h0,... 'position',[0.3 0.45 0.5 0.5],... 'visible','off'); b=remez(10,[0 0.4 0.6 1],[1 1 0 0]); h=ftrans2(b); [H,W]=freqz(b,1,64,'whole'); colormap(jet(64)) plot(W/pi-1,fftshift(abs(H))); b1=uicontrol('parent',h0,... 'units','points',... 'tag','b1',... 'backgroundcolor',[0.75 0.75 0.75],... 'style','pushbutton',... 'string','频率变换',... 'position',[30 100 50 20],... 'callback',[... 'cla,',... 'b=remez(10,[0 0.4 0.6 1],[1 1 0 0]);,',... 'h=ftrans2(b);,',... '[H,W]=freqz(b,1,64,''whole'');,',... 'colormap(jet(64)),',... 'freqz2(h,[32 32])']); b2=uicontrol('parent',h0,... 'units','points',... 'tag','b2',... 'backgroundcolor',[0.75 0.75 0.75],... 'style','pushbutton',... 'string','频率采样一',... 'position',[100 100 50 20],... 'callback',[... 'cla,',... 'Hd=zeros(11,11);,',... 'Hd(4:8,4:8)=1;,',... '[f1,f2]=freqspace(11,''meshgrid'');,',... 'mesh(f1,f2,Hd),',... 'axis([-1 1 -1 1 0 1.2]),',... 'colormap(jet(64))']); b3=uicontrol('parent',h0,... 'units','points',... 'tag','b3',... 'backgroundcolor',[0.75 0.75 0.75],... 'style','pushbutton',... 'string','频率采样二',... 'position',[170 100 50 20],... 'callback',[... 'cla,',... 'Hd=zeros(11,11);,',... 'Hd(4:8,4:8)=1;,',... 'H=fsamp2(Hd);,',... 'freqz2(h,[32 32]),',... 'axis([-1 1 -1 1 0 1.2]),',... 'colormap(jet(64))']); b4=uicontrol('parent',h0,... 'units','points',... 'tag','b4',... 'backgroundcolor',[0.75 0.75 0.75],... 'style','pushbutton',... 'string','关闭',... 'fontsize',15,... 'position',[80 50 80 30],... 'callback','close');

😊效果在这里插入图片描述

70. 函数变换

😉代码

h0=figure('toolbar','none',... 'position',[198 56 350 468],... 'name','函数变换'); h1=axes('parent',h0,... 'position',[0.25 0.45 0.5 0.5],... 'visible','off'); I=imread('cameraman.tif'); imshow(I); b1=uicontrol('parent',h0,... 'units','points',... 'tag','b1',... 'backgroundcolor',[0.75 0.75 0.75],... 'style','pushbutton',... 'string','图像解压',... 'position',[30 100 50 20],... 'callback',[... 'cla,',... 'I=imread(''cameraman.tif'');,',... 'I2=im2double(I);,',... 'imshow(I2)']); b2=uicontrol('parent',h0,... 'units','points',... 'tag','b2',... 'backgroundcolor',[0.75 0.75 0.75],... 'style','pushbutton',... 'string','图像压缩',... 'position',[100 100 50 20],... 'callback',[... 'cla,',... 'I=imread(''cameraman.tif'');,',... 'I=im2double(I);,',... 'T=dctmtx(8);,',... 'B=blkproc(I,[8 8],''P1*x*P2'',T,T'');,',... 'mask=[1 1 1 1 0 0 0 0;,',... '1 1 1 0 0 0 0 0;,',... '1 1 0 0 0 0 0 0;,',... '1 0 0 0 0 0 0 0;,',... '0 0 0 0 0 0 0 0;,',... '0 0 0 0 0 0 0 0;,',... '0 0 0 0 0 0 0 0;,',... '0 0 0 0 0 0 0 0];,',... 'B2=blkproc(B,[8 8],''P1.*x'',mask);,',... 'I2=blkproc(B2,[8 8],''P1*x*P2'',T'',T);,',... 'imshow(I2)']); b3=uicontrol('parent',h0,... 'units','points',... 'tag','b3',... 'backgroundcolor',[0.75 0.75 0.75],... 'style','pushbutton',... 'string','线条解析',... 'position',[170 100 50 20],... 'callback',[... 'cla,',... 'I=imread(''cameraman.tif'');,',... 'BW=edge(I);,',... 'imshow(BW)']); b4=uicontrol('parent',h0,... 'units','points',... 'tag','b4',... 'backgroundcolor',[0.75 0.75 0.75],... 'style','pushbutton',... 'string','关闭',... 'fontsize',15,... 'position',[80 50 80 30],... 'callback','close');

😊效果在这里插入图片描述

71. RADON 函数变换

😉代码

h0=figure('toolbar','none',... 'position',[198 56 350 468],... 'name','实例 71'); h1=axes('parent',h0,... 'position',[0.3 0.45 0.5 0.5],... 'visible','off'); P=phantom(256); imshow(P); b1=uicontrol('parent',h0,... 'units','points',... 'tag','b1',... 'style','pushbutton',... 'string','变换一',... 'backgroundcolor',[0.75 0.75 0.75],... 'position',[30 100 50 20],... 'callback',[... 'cla,',... 'k=1;,',... 'theta1=0:10:170;,',... 'R1=radon(P,theta1);,',... 'imagesc(R1),',... 'colormap(hot),',... 'colorbar']); b2=uicontrol('parent',h0,... 'units','points',... 'tag','b2',... 'style','pushbutton',... 'string','变换二',... 'backgroundcolor',[0.75 0.75 0.75],... 'position',[100 100 50 20],... 'callback',[... 'cla,',... 'k=2;,',... 'theta2=0:5:175;,',... 'R2=radon(P,theta2);,',... 'imagesc(R2),',... 'colormap(hot),',... 'colorbar']); b3=uicontrol('parent',h0,... 'units','points',... 'tag','b3',... 'style','pushbutton',... 'string','变换三',... 'backgroundcolor',[0.75 0.75 0.75],... 'position',[170 100 50 20],... 'callback',[... 'cla,',... 'k=3;,',... 'theta3=0:2:178;,',... 'R3=radon(P,theta3);,',... 'imagesc(R3),',... 'colormap(hot),',... 'colorbar']); b4=uicontrol('parent',h0,... 'units','points',... 'tag','b4',... 'style','pushbutton',... 'string','原始图像',... 'backgroundcolor',[0.75 0.75 0.75],... 'position',[50 50 70 30],... 'callback',[... 'cla,',... 'if k==1,',... 'I1=iradon(R1,10);,',... 'imshow(I1),',... 'end,',... 'if k==2,',... 'I2=iradon(R2,5);,',... 'imshow(I2),',... 'end,',... 'if k==3,',... 'I3=iradon(R3,2);,',... 'imshow(I3),',... 'end']); b5=uicontrol('parent',h0,... 'units','points',... 'tag','b5',... 'style','pushbutton',... 'string','关闭',... 'backgroundcolor',[0.75 0.75 0.75],... 'position',[150 50 70 30],... 'callback','close');

😊效果在这里插入图片描述

72. 图像分析（1）

这个可能还有些问题… 😉代码

h0=figure('toolbar','none',... 'position',[198 56 350 468],... 'name','实例 72'); h1=axes('parent',h0,... 'position',[0.25 0.45 0.5 0.5],... 'visible','off'); I=imread("D:\opencv\JPEGdata\IMG_20210603_185840.jpg"'); imshow(I) k=0; b1=uicontrol('parent',h0,... 'units','points',... 'tag','b1',... 'style','pushbutton',... 'string','图像轮廓图',... 'backgroundcolor',[0.75 0.75 0.75],... 'position',[20 100 60 20],... 'callback',[... 'cla,',... 'k=1;,',... 'I=imread("D:\opencv\JPEGdata\IMG_20210603_185840.jpg");,',... 'imcontour(I)']); b2=uicontrol('parent',h0,... 'units','points',... 'tag','b2',... 'style','pushbutton',... 'string','SOBEL 边界图',... 'backgroundcolor',[0.75 0.75 0.75],... 'position',[100 100 60 20],... 'callback',[... 'cla,',... 'k=2;,',... 'I=imread("D:\opencv\JPEGdata\IMG_20210603_185840.jpg");,',... 'BW=edge(I,''sobel'');,',... 'imshow(BW)']); b3=uicontrol('parent',h0,... 'units','points',... 'tag','b3',... 'style','pushbutton',... 'string','CANNY 边界图',... 'backgroundcolor',[0.75 0.75 0.75],... 'position',[180 100 60 20],... 'callback',[... 'cla,',... 'k=3;,',... 'I=imread("D:\opencv\JPEGdata\IMG_20210603_185840.jpg");,',... 'BW=edge(I,''canny'');,',... 'imshow(BW)']); b4=uicontrol('parent',h0,... 'units','points',... 'tag','b4',... 'style','pushbutton',... 'string','灰度调整',... 'backgroundcolor',[0.75 0.75 0.75],... 'position',[20 50 60 20],... 'callback',[... 'cla,',... 'k=4;,',... 'I=imread("D:\opencv\JPEGdata\IMG_20210603_185840.jpg");,',... 'J=imadjust(I,[0.15 0.9],[0 1]);,',... 'imshow(J,64)']); b5=uicontrol('parent',h0,... 'units','points',... 'tag','b5',... 'style','pushbutton',... 'string','图像柱状图',... 'backgroundcolor',[0.75 0.75 0.75],... 'position',[180 50 60 20],... 'callback',[... 'if k==0,',... 'figure,',... 'imhist(I,64),',... 'end,',... 'if k==1,',... 'imhist(I,64),',... 'end,',... 'if k==2,',... 'imhist(BW,64),',... 'end,',... 'if k==3,',... 'imhist(BW,64),',... 'end,',... 'if k==4,',... 'imhist(J),',... 'end']); b6=uicontrol('parent',h0,... 'units','points',... 'tag','b6',... 'style','pushbutton',... 'string','关闭',... 'backgroundcolor',[0.75 0.75 0.75],... 'position',[100 50 60 20],... 'callback','close');

😊效果在这里插入图片描述

73. 过滤图像

😉代码

h0=figure('toolbar','none',... 'position',[198 56 350 468],... 'name','实例 73'); h1=axes('parent',h0,... 'position',[0.25 0.45 0.5 0.5],... 'visible','off'); I=imread('eight.tif'); imshow(I) u1=uimenu('parent',h0,... 'tag','u1',... 'label',' 添加噪声 ',... 'Foregroundcolor',[0.75 0.75 0.75]); u11=uimenu('parent',u1,... 'tag','u11',... 'label','SALT&PEPPER 噪声',... 'Foregroundcolor',[0.75 0.75 0.75],... 'callback',[... 'set(u11,''checked'',''on'');,',... 'set(u12,''checked'',''off'');,',... 'cla,',... 'I=imnoise(I,''salt & pepper'',0.02);,',... 'imshow(I)']); u12=uimenu('parent',u1,... 'tag','u12',... 'label','GAUSSIAN 噪声',... 'Foregroundcolor',[0.75 0.75 0.75],... 'callback',[... 'set(u12,''checked'',''on'');,',... 'set(u11,''checked'',''off'');,',... 'cla,',... 'I=imnoise(I,''gaussian'',0,0.005);,',... 'imshow(I)']); b1=uicontrol('parent',h0,... 'units','points',... 'tag','b1',... 'style','pushbutton',... 'string','均平过滤',... 'Foregroundcolor',[0.75 0.75 0.75],... 'position',[30 100 50 20],... 'callback',[... 'cla,',... 'J=filter2(fspecial(''average'',3),I)/255;,',... 'imshow(J)']); b2=uicontrol('parent',h0,... 'units','points',... 'tag','b2',... 'style','pushbutton',... 'string','中值过滤',... 'Foregroundcolor',[0.75 0.75 0.75],... 'position',[100 100 50 20],... 'callback',[... 'cla,',... 'J=medfilt2(I,[3 3]);,',... 'imshow(J)']); b3=uicontrol('parent',h0,... 'units','points',... 'tag','b3',... 'style','pushbutton',... 'string','自适应过滤',... 'Foregroundcolor',[0.75 0.75 0.75],... 'position',[170 100 50 20],... 'callback',[... 'cla,',... 'J=wiener2(I,[5 5]);,',... 'imshow(J)']); b4=uicontrol('parent',h0,... 'units','points',... 'tag','b4',... 'style','pushbutton',... 'string','关闭',... 'fontsize',15,... 'Foregroundcolor',[0.75 0.75 0.75],... 'position',[90 50 70 30],... 'callback','close');

😊效果在这里插入图片描述

74. 图像的区域处理

😉代码

h0=figure('toolbar','none',... 'position',[198 56 350 468],... 'name','实例 74'); h1=axes('parent',h0,... 'position',[0.25 0.45 0.5 0.5],... 'visible','off'); I=imread('trees.tif'); imshow(I) b1=uicontrol('parent',h0,... 'units','points',... 'tag','b1',... 'style','pushbutton',... 'string','区域过滤一',... 'backgroundcolor',[0.75 0.75 0.75],... 'position',[30 100 50 20],... 'callback',[... 'cla,',... 'I=imread(''trees.tif'');,',... 'imshow(I),',... 'BW=roipoly;,',... 'h=fspecial(''unsharp'');,',... 'I2=roifilt2(h,I,BW);,',... 'imshow(I2)']); b2=uicontrol('parent',h0,... 'units','points',... 'tag','b2',... 'style','pushbutton',... 'string','区域过滤二',... 'backgroundcolor',[0.75 0.75 0.75],... 'position',[100 100 50 20],... 'callback',[... 'cla,',... 'BW=imread(''text.tif'');,',... 'f=inline(''imadjust(x,[],[],0.01)'');,',... 'I2=roifilt2(I,BW,f);,',... 'imshow(I2)']); b3=uicontrol('parent',h0,... 'units','points',... 'tag','b3',... 'style','pushbutton',... 'string','区域填充',... 'backgroundcolor',[0.75 0.75 0.75],... 'position',[170 100 50 20],... 'callback',[... 'cla,',... 'load trees,',... 'I=ind2gray(X,map);,',... 'imshow(I),',... 'I2=roifill;,',... 'imshow(I2)']); b4=uicontrol('parent',h0,... 'units','points',... 'tag','b4',... 'style','pushbutton',... 'string','关闭',... 'backgroundcolor',[0.75 0.75 0.75],... 'position',[90 50 70 30],... 'callback','close');

😊效果在这里插入图片描述

75. 图像的颜色处置

😉代码

h0=figure('toolbar','none',... 'position',[198 56 350 468],... 'name','实例 75'); h1=axes('parent',h0,... 'position',[0.12 0.45 0.75 0.5],... 'visible','off'); I=imread('trees.tif'); imshow(I) b1=uicontrol('parent',h0,... 'units','points',... 'tag','b1',... 'style','pushbutton',... 'string','减少颜色',... 'backgroundcolor',[0.75 0.75 0.75],... 'position',[30 100 50 20],... 'callback',[... 'cla,',... '[X,map]=imread(''trees.tif'');,',... '[Y,map2]=imapprox(X,map,64);,',... 'image(Y),',... 'colormap(map2)']); b2=uicontrol('parent',h0,... 'units','points',... 'tag','b2',... 'style','pushbutton',... 'string','颜色抖动',... 'backgroundcolor',[0.75 0.75 0.75],... 'position',[100 100 50 20],... 'callback',[... 'cla,',... 'I=imread(''trees.tif'');,',... '[X,map]=rgb2ind(I,128,''nodither'');,',... 'imshow(X)']); b3=uicontrol('parent',h0,... 'units','points',... 'tag','b3',... 'style','pushbutton',... 'string','颜色转换一',... 'backgroundcolor',[0.75 0.75 0.75],... 'position',[170 100 50 20],... 'callback',[... 'cla,',... 'I=imread(''trees.tif'');,',... 'Y=rgb2ntsc(I);,',... 'J=Y(:,:,1);,',... 'imshow(J)']); b4=uicontrol('parent',h0,... 'units','points',... 'tag','b4',... 'style','pushbutton',... 'string','关闭',... 'backgroundcolor',[0.75 0.75 0.75],... 'position',[170 50 50 20],... 'callback','close'); b5=uicontrol('parent',h0,... 'units','points',... 'tag','b5',... 'style','pushbutton',... 'string','颜色转换三',... 'backgroundcolor',[0.75 0.75 0.75],... 'position',[100 50 50 20],... 'callback',[... 'cla,',... 'I=imread(''trees.tif'');,',... 'J=rgb2ycbcr(I);,',... 'imshow(J)']); b6=uicontrol('parent',h0,... 'units','points',... 'tag','b6',... 'style','pushbutton',... 'string','颜色转换二',... 'backgroundcolor',[0.75 0.75 0.75],... 'position',[30 50 50 20],... 'callback',[... 'cla,',... 'I=imread(''trees.tif'');,',... 'J=rgb2hsv(I);,',... 'imshow(J)']);

😊效果在这里插入图片描述

【本文地址】

【MATLAB100个实用小技巧】

【MATLAB100个实用小技巧】

今日新闻

推荐新闻