How to make the function has many process in GUI image processing?

% --- Executes on button press in uploadimage.

function uploadimage_Callback(hObject, eventdata, handles)

%% to import the image into the matlab

global a im2

[filename, pathname]=uigetfile('*.*', 'Pick a MATLAB code file');

filename=strcat(pathname,filename);

a=imread(filename);

a=im2double(a);

im2 = a;

axes(handles.axes1);

imshow(a)

title('\fontsize{20}\color[rgb]{0.996, 0.592, 0.0}Kidney Ultrasound')

% --- Executes on button press in preprocessedimage.

function preprocessedimage_Callback(hObject, eventdata, handles)

global a

axes(handles.axes2);

%% change it into gray scale image

b=rgb2gray(a);

%% make the image into binary image

impixelinfo;

c=b>20;

%% to fill the holes

d=imfill(c,'holes');

%% remove some lighting remove the unwanted things in the image

e=bwareaopen(d,1000);

PreprocessedImage=uint8(double(a).*repmat(e,[1 1 3]));

imshow(a);

title('\fontsize{20}\color[rgb]{0.996, 0.592, 0.0}Preprocessed Image')

Answer 1

[Cris LaPierre]

See this page:

https://www.mathworks.com/help/matlab/app-designer.html

and perhaps this example:

https://www.mathworks.com/help/matlab/creating_guis/image-histogram-gui-in-app-designer.html