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Matlab implementation of Huffman coding and decoding with GUI interface
2022-07-07 11:49:00 【Matlab scientific research studio】
1 brief introduction
stay matlab Middle simulation C Middle linked list , Using complex number operation , Contact specific characters and probabilities , Find the number corresponding to the two characters of the minimum probability each time , Record it in turn , Finally, according to the different implementation of parity codes Huffman code . This algorithm is novel and unique , Easy to understand , Programming .
2 Part of the code
function varargout = huffman_GUI(varargin)
% HUFFMAN_GUI M-file for huffman_GUI.fig
% HUFFMAN_GUI, by itself, creates a new HUFFMAN_GUI or raises the existing
% singleton*.
%
% H = HUFFMAN_GUI returns the handle to a new HUFFMAN_GUI or the handle to
% the existing singleton*.
%
% HUFFMAN_GUI('CALLBACK',hObject,eventData,handles,...) calls the local
% function named CALLBACK in HUFFMAN_GUI.M with the given input arguments.
%
% HUFFMAN_GUI('Property','Value',...) creates a new HUFFMAN_GUI or raises the
% existing singleton*. Starting from the left, property value pairs are
% applied to the GUI before huffman_GUI_OpeningFunction gets called. An
% unrecognized property name or invalid value makes property application
% stop. All inputs are passed to huffman_GUI_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 huffman_GUI
% Last Modified by GUIDE v2.5 10-Jan-2014 18:20:43
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name', mfilename, ...
'gui_Singleton', gui_Singleton, ...
'gui_OpeningFcn', @huffman_GUI_OpeningFcn, ...
'gui_OutputFcn', @huffman_GUI_OutputFcn, ...
'gui_LayoutFcn', [] , ...
'gui_Callback', []);
if nargin & isstr(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 huffman_GUI is made visible.
function huffman_GUI_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 huffman_GUI (see VARARGIN)
% Choose default command line output for huffman_GUI
handles.output = hObject;
% Update handles structure
guidata(hObject, handles);
% UIWAIT makes huffman_GUI wait for user response (see UIRESUME)
% uiwait(handles.figure1);
% --- Outputs from this function are returned to the command line.
function varargout = huffman_GUI_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;
% --- Executes during object creation, after setting all properties.
function xylj_CreateFcn(hObject, eventdata, handles)
% hObject handle to xylj (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called
% Hint: edit controls usually have a white background on Windows.
% See ISPC and COMPUTER.
if ispc
set(hObject,'BackgroundColor','white');
else
set(hObject,'BackgroundColor',get(0,'defaultUicontrolBackgroundColor'));
end
function xylj_Callback(hObject, eventdata, handles)
% hObject handle to xylj (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hints: get(hObject,'String') returns contents of xylj as text
% str2double(get(hObject,'String')) returns contents of xylj as a double
% --- Executes on button press in dqxy.
function dqxy_Callback(hObject, eventdata, handles)
% hObject handle to dqxy (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
[Filename Pathname]=uigetfile({'*.txt'},' Please select a file '); % Select the file box function
str=[Pathname Filename]; % Get the path and file name
xinyuan=textread(str,'%s'); % In the form of strings , Read in a text file
xinyuan=xinyuan{:}; % take cell Type data into char
set(handles.xylj,'string',str) % Show the path of the source
set(handles.xy,'string',xinyuan) % Show source
% --- Executes during object creation, after setting all properties.
function xy_CreateFcn(hObject, eventdata, handles)
% hObject handle to xy (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called
% Hint: edit controls usually have a white background on Windows.
% See ISPC and COMPUTER.
if ispc
set(hObject,'BackgroundColor','white');
else
set(hObject,'BackgroundColor',get(0,'defaultUicontrolBackgroundColor'));
end
function xy_Callback(hObject, eventdata, handles)
% hObject handle to xy (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hints: get(hObject,'String') returns contents of xy as text
% str2double(get(hObject,'String')) returns contents of xy as a double
% --- Executes on button press in pushbutton2.
function pushbutton2_Callback(hObject, eventdata, handles)
% hObject handle to pushbutton2 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% --- Executes on button press in bm.
function bm_Callback(hObject, eventdata, handles)
% hObject handle to bm (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
clc; % eliminate command window
data=get(handles.xy,'String'); % Read into the source
data=uint8(data); % Convert the source into uint8
[codeword_OK,simbolsout1,fout1,simbolsout2,fout2,zipped,info] = norm2huff(data); % code
% Before ordering
for i=1:length(fout1)
fout1str{i}=num2str(fout1(i)); % Convert the probability before sorting into cell Type data , convenient listbox Use
str1{i}=char(simbolsout1(i)-1); % Convert the symbols before sorting into cell Type data , convenient listbox Use ,char take ASCII Code to character
end
handles.str1=str1; % Get the pre sort symbol
handles.fout1str=fout1str; % Get the pre ranking probability
% After ordering
for i=1:length(fout2)
str2{i}=char(simbolsout2(i)-1); % Convert the sorted symbols into cell Type data , convenient listbox Use ,char take ASCII Code to character
end
handles.str2=str2; % Get the sorted symbols
% Get the code
for i=1:length(codeword_OK)
codestr{i}=num2str(double(codeword_OK{i}));
codestr{i}=codestr{i}(find(codestr{i}~=' ')); % Remove the spaces in the string , Get Hoffman code
end
handles.codestr=codestr; % Save Hoffman code
handles.zipped=zipped; % Save the encoded results
handles.info=info;
guidata(hObject, handles); % to update handles Structure
% --- Executes on button press in myzl.
function myzl_Callback(hObject, eventdata, handles)
% hObject handle to myzl (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
set(handles.xsmyzl,'Value',1)
set(handles.xsmyzl,'String',handles.str1);
% --- Executes during object creation, after setting all properties.
function xsmyzl_CreateFcn(hObject, eventdata, handles)
% hObject handle to xsmyzl (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called
% Hint: listbox controls usually have a white background on Windows.
% See ISPC and COMPUTER.
if ispc
set(hObject,'BackgroundColor','white');
else
set(hObject,'BackgroundColor',get(0,'defaultUicontrolBackgroundColor'));
end
% --- Executes on selection change in xsmyzl.
function xsmyzl_Callback(hObject, eventdata, handles)
% hObject handle to xsmyzl (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hints: contents = get(hObject,'String') returns xsmyzl contents as cell array
% contents{get(hObject,'Value')} returns selected item from xsmyzl
error('input argument must be a uint8 vector')
end
%f=repmat(0,1,256);
% Scan vector
len=length(vector);
for index=0:255; % Note that the index parameter of the vector is from 0 At the beginning
f(index+1)=sum(vector==uint8(index));
end
%
3 Simulation results
4 reference
[1] Wu Jiqun , Li shuangke . Matlab achieve huffman code [J]. China Science and technology information , 2006(19):2.
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