A brief introduction to digital image processing
Image processing basic tutorial 1 based on MATLAB image processing (presentation method + data structure + basic format + type conversion + read + point operations + algebra operations 【 basic tutorial 】 based on MATLAB image processing (reading and writing + display + operation + conversion + transformation + enhancement + filtering + analysis + statistics) 【 matlab source 144期】
Two, some source code
function varargout = flash_card(varargin)
% FLASH_CARD MATLAB code for flash_card.fig
% FLASH_CARD, by itself, creates a new FLASH_CARD or raises the existing
% singleton*.
%
% H = FLASH_CARD returns the handle to a new FLASH_CARD or the handle to
% the existing singleton*.
%
% FLASH_CARD('CALLBACK',hObject,eventData,handles,...) calls the local
% function named CALLBACK in FLASH_CARD.M with the given input arguments.
%
% FLASH_CARD('Property'.'Value',...). creates anew FLASH_CARD or raises the
% existing singleton*. Starting from the left, property value pairs are
% applied to the GUI before flash_card_OpeningFcn gets called. An
% unrecognized property name or invalid value makes property application
% stop. All inputs are passed to flash_card_OpeningFcn via varargin.
%
% *See GUI Options on GUIDE's Tools menu. Choose "GUI allows only one % instance to run (singleton)".
%
% See also: GUIDE, GUIDATA, GUIHANDLES
% Edit the above text to modify the response to help flash_card
% Last Modified by GUIDE v2. 5 09-Mar- 2021. 14:00:14
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name', mfilename, ...
'gui_Singleton', gui_Singleton, ...
'gui_OpeningFcn', @flash_card_OpeningFcn, ...
'gui_OutputFcn', @flash_card_OutputFcn, ...
'gui_LayoutFcn', [],...'gui_Callback'[]);if nargin && ischar(varargin{1})
gui_State.gui_Callback = str2func(varargin{1});
end
if nargout
[varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
gui_mainfcn(gui_State, varargin{:});
end
% End initialization code - DO NOT EDIT
% --- Executes just before flash_card is made visible.
function flash_card_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject handle to figure
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% varargin command line arguments to flash_card (see VARARGIN)
% Choose default command line output for flash_card
handles.output = hObject;
set(handles.hard_prob,'UserData',str2double(get(handles.hard_prob,'string')))
set(handles.medium_prob,'UserData',str2double(get(handles.medium_prob,'string')))
set(handles.easy_prob,'UserData',str2double(get(handles.easy_prob,'string')))
handles.probs=[];
handles.names=[];
handles.D=[];
handles.current_card=[];
% Update handles structure
guidata(hObject, handles);
% UIWAIT makes flash_card wait for user response (see UIRESUME)
% uiwait(handles.figure1);
% --- Outputs from this function are returned to the command line.
function varargout = flash_card_OutputFcn(hObject, eventdata, handles)
% varargout cell array for returning output args (see VARARGOUT);
% hObject handle to figure
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Get default command line output from handles structure
varargout{1} = handles.output; % -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --function file_1_Callback(hObject, eventdata, handles)
% hObject handle to file_1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
%
function gen_flash_card_file(d)
if d= =0
msgbox('Please select a valid folder');
return;
end
dout=dir(d);
fname=sprintf('%s/flash_card.txt',d);
if exist(fname,'file')
qans=questdlg(sprintf('A list file %s already exists, overwrite? ',fname));
if ~strcmp(qans,'Yes')
return;
end
else
qans=questdlg(sprintf('List file %s doesn''t exist, create? ',fname));
if ~strcmp(qans,'Yes')
return;
end
end
fout=fopen(fname,'w');
for fid=1:length(dout)
fname=dout(fid).name;
if dout(fid).isdir; continue; end; % skip directories
fprintf(fout,'%s; %s; 1\n',fname,strip(fname));
end
fclose(fout);
msgbox(sprintf('List file flash_card.txt created under %s',d));
%
function fname=strip(fname)
fname=strrep(fname,'_'.' ');
ids=findstr(fname,'. ');
if ~isempty(ids)
fname=fname(1:ids(1)- 1);
end
% --------------------------------------------------------------------
function exit_1_Callback(hObject, eventdata, handles)
% hObject handle to exit_1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
close(handles.figure1); % -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --function tool_2_Callback(hObject, eventdata, handles)
% hObject handle to tool_2 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% --------------------------------------------------------------------
function generate_3_Callback(hObject, eventdata, handles)
% hObject handle to generate_3 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
popupmessage('flash_card_help.txt'.'Flash Card Help'); % -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --function load_1_Callback(hObject, eventdata, handles)
% hObject handle to load_1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
d=uigetdir;
if d==0
msgbox('Please select a valid folder');
disable_buttons(handles);
disable_menus(handles);
return;
end
enable_menus(handles);
save_probs(hObject, handles); % save previous probabilities
if ~exist(sprintf('%s/flash_card.txt',d),'file')
gen_flash_card_file(d);
end
[names,probs]=load_data(d);
if isempty(names)
disable_buttons(handles);
disable_menus(handles);
else
enable_buttons(handles);
enable_menus(handles);
end
handles.names=names;
handles.probs=probs;
handles.D=d;
guidata(hObject, handles);
get_next_card(hObject,handles);
function disable_menus(handles)
set(handles.Untitled_2,'enable'.'off');
set(handles.Untitled_3,'enable'.'off');
function enable_menus(handles)
set(handles.Untitled_2,'enable'.'on');
set(handles.Untitled_3,'enable'.'on');
function disable_buttons(handles)
set(handles.pushbutton1,'enable'.'off');
set(handles.pushbutton2,'enable'.'off');
set(handles.pushbutton3,'enable'.'off');
set(handles.pushbutton4,'enable'.'off');
function enable_buttons(handles)
set(handles.pushbutton1,'enable'.'off');
set(handles.pushbutton2,'enable'.'off');
set(handles.pushbutton3,'enable'.'off');
set(handles.pushbutton4,'enable'.'on');
%
function [names,probs]=load_data(d)
names=[]; probs=[];
fname=sprintf('%s/flash_card.txt',d);
fin=fopen(fname,'r');
if fin <0;
msgbox(sprintf('Cannot open list file %s',fname));
return;
end
did=1;
disable_ui;
try
while 1
tline=fgetl(fin);
if ~ischar(tline); break; end;
sids=strfind(tline,'; ');
names(did).fname=tline(1:sids(1)- 1);
names(did).pname=tline(sids(1) +1:sids(2)- 1);
probs(did)=str2double(tline(sids(2) +1:end));
did=did+1;
end
catch
msgbox('flash_card.txt is corrupted. Please regenerate list file from Tool Menu');
fclose(fin);
return;
end
Copy the code3. Operation results
Matlab version and references
1 matlab version 2014A
2 Reference [1] CAI Limei. MATLAB Image Processing — Theory, Algorithm and Case Analysis [M]. Tsinghua University Press, 2020. [2] Yang Dan, ZHAO Haibin, LONG Zhe. Examples of MATLAB Image Processing In detail [M]. Tsinghua University Press, 2013. [3] Zhou Pin. MATLAB Image Processing and Graphical User Interface Design [M]. Tsinghua University Press, 2013. [4] LIU Chenglong. Proficient in MATLAB Image Processing [M]. Tsinghua University Press, 2015. [5] Chen Hao, FANG Yong, Zhu Dazhou, WANG Cheng, Chen Zilong. Edge detection of thermal infrared image of maize plant based on ant colony algorithm [J]. Journal of agricultural mechanization research, 2015,37(06)