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whenever i call the recognition push button in my gui interface the error message is showing

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indrani dalui
indrani dalui 2020-5-1
关闭： MATLAB Answer Bot 2021-8-20
CODE
% --- Executes on button press in Recognation.
function Recognation_Callback(hObject, eventdata, handles)
% hObject handle to Recognation (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
CCoeff = corr2(A,B)
if CCoeff > 0.7 % (choose a value < 1) % image 1 and image 2 are compared
msgbox('Both A and B are similar', 'MESSAGE');
else
msgbox('A and B are not similar', 'MESSAGE');
end
ERROR
Error in matching (line 42)
gui_mainfcn(gui_State, varargin{:});
Error in
matlab.graphics.internal.figfile.FigFile/read>@(hObject,eventdata)matching('Recognation_Callback',hObject,eventdata,guidata(hObject))
Error while evaluating UIControl Callback.

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回答（1 个）

Geoff Hayes
Geoff Hayes 2020-5-1
indrani - you haven't posted the full error message but presumably it has something to do with
CCoeff = corr2(A,B)
where A and B aren't defined. How or where have these variables been set previously in your code? Consider adding them to the handles structure so that all callbacks have access to this data. See guidata for details on how you can do this.
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indrani dalui
indrani dalui 2020-5-2
sir, if i want to put the following code instade of the previous matching part what changes should i have to make.
% FINGERPRINT MATCHING SCORE
%
% Usage: [ S ] = match( M1, M2, display_flag );
%
% Argument: M1 - First Minutiae
% M2 - Second Minutiae
% display_flag
%
% Returns: S - Similarity Measure
function [ S ] = match( M1, M2, display_flag )
if nargin==2; display_flag=0; end
M1=M1(M1(:,3)<5,:);
M2=M2(M2(:,3)<5,:);
count1=size(M1,1); count2=size(M2,1);
bi=0; bj=0; ba=0; % Best i,j,alpha
S=0; % Best Similarity Score
for i=1:count1
T1=transform(M1,i);
for j=1:count2
if M1(i,3)==M2(j,3)
T2=transform(M2,j);
for a=-5:5 %Alpha
T3=transform2(T2,a*pi/180);
sm=score(T1,T3);
if S<sm
S=sm;
bi=i; bj=j; ba=a;
end
end
end
end
end
if display_flag==1
figure, title(['Similarity Measure : ' num2str(S)]);
T1=transform(M1,bi);
T2=transform(M2,bj);
T3=transform2(T2,ba*pi/180);
plot_data(T1,1);
plot_data(T3,2);
end
end

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