Matlab图像处理app（截图暂时只能截取原图或灰度图）
因为之前做过一个类似的app，所以我这次在app上的功能只是在灰度图上实现，不能叠加的实现，如果想要所有功能显示叠加效果，可以每次操作后使用一个全局变量将变换后的图片保存即可；
边缘提取部分：
function sureButtonPushed(app, event)
app.bianyuan=app.ListBox.Value;
size1=size(app.picture);
if numel(size1)>2
app.picture=rgb2gray(app.picture);
end
switch app.bianyuan
case 'Roberts'
[J, thresh] = edge(app.picture, 'Roberts', 30/255);
imshow(J,'Parent',app.UIAxes2);
case 'Canny'
[J, thresh] = edge(app.picture, 'canny');
imshow(J,'Parent',app.UIAxes2);
case 'LOG'
[J, thresh] = edge(app.picture, 'log');
imshow(J,'Parent',app.UIAxes2);
case 'Prewit'
[J, thresh] = edge(app.picture, 'prewitt');
imshow(J,'Parent',app.UIAxes2);
case 'Sobel'
[J, thresh] = edge(app.picture, 'sobel');
imshow(J,'Parent',app.UIAxes2);
end
end对比度部分：
function SliderValueChanging(app, event)
changingValue = event.Value;
changingValue=changingValue./100;
size1=size(app.picture);
if numel(size1)>2
app.picture=rgb2gray(app.picture);
end
if changingValue<0.5
duibi=imadjust(app.picture,[changingValue,1-changingValue],[]);
imshow(duibi,'Parent',app.UIAxes2);
else
changingValue=0;
duibi=imadjust(app.picture,[changingValue,1-changingValue],[]);
imshow(duibi,'Parent',app.UIAxes2);
end
end直方图均衡化部分：
function ButtonGroupSelectionChanged(app, event)
selectedButton = app.ButtonGroup.SelectedObject;
size1=size(app.picture);
if numel(size1)>2
app.picture=rgb2gray(app.picture);
end
switch selectedButton.Text
case '是'
zhifang=histeq(app.picture);
imshow(zhifang,'Parent',app.UIAxes2);
case '否'
imshow(app.picture,'Parent',app.UIAxes2);
return;
end
end模糊度部分：
function Spinner_2ValueChanged(app, event)
value = app.Spinner_2.Value;
size1=size(app.picture);
if numel(size1)>2
app.picture=rgb2gray(app.picture);
end
way=fspecial('motion',value,value);
picture2=imfilter(app.picture,way);
imshow(picture2,'Parent',app.UIAxes2);
end锐化部分：
function SpinnerValueChanged(app, event)
value = app.Spinner.Value;
value=value./100;
size1=size(app.picture);
if numel(size1)>2
app.picture=rgb2gray(app.picture);
end
way=fspecial('sobel');
picture3=imfilter(app.picture,way);
picture3=app.picture+uint8(picture3)*value;
imshow(picture3,'Parent',app.UIAxes2);
end亮度部分：
function Spinner_3ValueChanged(app, event)
value = app.Spinner_3.Value;
size1=size(app.picture);
if numel(size1)>2
app.picture=rgb2gray(app.picture);
end
picture4=imadd(app.picture,value);
imshow(picture4,'Parent',app.UIAxes2);
end图像分割部分：
function sureButton_2Pushed(app, event)
chance=app.ListBox_2.Value;
size1=size(app.picture);
if(numel(size1)>2)
app.picture=rgb2gray(app.picture);
end
switch chance
case 'Otsu'
M=graythresh(app.picture);
I=im2bw(app.picture,M);
imshow(I,'Parent',app.UIAxes2);
case '迭代阈值分割'
I=im2double(app.picture);
S=0.1;
S1=(max(I(:))+min(I(:)))/2;
r1=find(I>S1);
r2=find(I<=S1);
S2=(mean(I(r1))+mean(I(r2)))/2;
while abs(S2-S1)>S
S1=S2;
r1=find(I>S1);
r2=find(I<=S1);
S2=(mean(I(r1))+mean(I(r2)))/2;
end
I=im2bw(I,S2);
imshow(I,'Parent',app.UIAxes2);
case '区域生长法'
imshow(app.picture,'Parent',app.UIAxes2);
I=im2double(app.picture);
[M,N]=size(I);
[y,x]=getpts(app.UIAxes2);
x1=round(x);
y1=round(y);
seed=I(x1,y1);
grow1=zeros(M,N);%要绘制二值图，就可以先设置为0数组
grow1(x1,y1)=1;%种子点设为1，满足条件的点在后续判断中也会设为一
growcount=1; %待处理点个数
threshold=0.15;%与isinteger相互结合起来理解，如果没有isinteger，该值应该变得很大
while growcount>0
growcount=0;
for i=1:M %让种子去融合图片中满足的所有点
for j=1:N
if grow1(i,j)==1 %点在"栈"内，即一开始先检测到种子点，然后根据判断条件去判断种子点邻域的点是否满足条件，若满足为1，然后进行下一轮循环进行判断，直到循环时没有点可以满足添加进行融合了
if (i-1)>0&(i+1)0&(j+1) open：
function openButtonPushed(app, event)
[filename,pathname]=uigetfile('*.jpg','picture');
if isequal(pathname,'')
msgbox('没有选中图片','nn','warn');
else
app.name=strcat(pathname,filename);
app.EditField.Value=app.name;
app.picture=imread(app.name);
imshow(app.picture,'Parent',app.UIAxes);
end
endlevelangle：
function levelangleKnob_2ValueChanging(app, event)
changingValue = event.Value;
size1=size(app.picture);
if numel(size1)>2
app.picture=rgb2gray(app.picture);
end
picture6=imrotate(app.picture,changingValue);
imshow(picture6,'Parent',app.UIAxes2);
endmirror：
function mirrorKnobValueChanged(app, event)
value = app.mirrorKnob.Value;
size1=size(app.picture);
if numel(size1)>2
app.picture=rgb2gray(app.picture);
end
switch value
case 'x镜面'
picture7=flip(app.picture,1);
case 'y镜面'
picture7=flip(app.picture,2);
end
imshow(picture7,'Parent',app.UIAxes2);
end灰度图：
function Button_6Pushed(app, event)
app.picture=rgb2gray(app.picture);
imshow(app.picture,'Parent',app.UIAxes2);
end
截图：
function Button_5Pushed(app, event)
savepicture=figure('Visible','on');
copyobj(app.UIAxes2,savepicture);
set(gca,'Units','normalized','Position',[0 0 1 1]);
for i=1:1:2
[x,y]=getpts;
if(i==1)
app.cut1=x;
app.cut2=y;
else
app.cut3=x;
app.cut4=y;
end
end
% msgbox(string(app.cut1));
% msgbox(string(abs(app.cut1-app.cut3)));
% msgbox(string(abs(app.cut4-app.cut2)));
% msgbox(string(app.cut2));
% msgbox(string(app.cut3));
% msgbox(string(app.cut4));
% [m,n]=size(app.picture);
% m=floor(m./2);
% n=floor(n./2);
% k=findall(gcf,'type','line')
% x=get(k,'xdata');
% y=get(k,'ydata');
% x=cell2mat(x);
% y=cell2mat(y);
saveas(savepicture,'1.jpg');
% n=imcrop(savepicture,[app.cut1,app.cut2,app.cut3,app.cut4]);
% imwrite(k(x(app.cut1:app.cut3),y(app.cut2:app.cut4)),'1.jpg');
imwrite(app.picture(app.cut1:app.cut3,app.cut2:app.cut4),'0.jpg');
end
保存：
function saveButtonPushed(app, event)
savepicture=figure('Visible','off');
copyobj(app.UIAxes2,savepicture);
set(gca,'Units','normalized','Position',[0.2 0.2 0.8 0.8]);
saveas(savepicture,'nb.jpg');
end