error while evaluating uicontrol call back

function main_OpeningFcn(hObject, ~, 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 main (see VARARGIN)

% Choose default command line output for main
handles.output = hObject;

% Update handles structure
guidata(hObject, handles);

% UIWAIT makes main wait for user response (see UIRESUME)
% uiwait(handles.figure1);


% --- Outputs from this function are returned to the command line.
function varargout = main_OutputFcn(~, ~, 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 on button press in pushbutton1.
function pushbutton1_Callback(hObject, ~, handles)
% hObject    handle to pushbutton1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global fname;
FileName = imread('1.jpg');
img=imread(FileName);
axes(handles.axes1);
imshow(img);
fname=FileName;
handles.filename=FileName;
guidata(hObject,handles)
img=imread(strcat('D/',fname));
axes(handles.axes2);
imshow(img);
fname=FileName;
handles.filename=FileName;
guidata(hObject,handles)

[Adam]

Just posting a load of code is not much help if you don't ask a question. If you have an error post the complete error message, indicating which line it refers to.

[vidhya sagar]

hi

i got error saying that " error while evaluating ui callback"

when i clickbutton i should actually be able to input 2d image which later will be converted to a 3d image. but it is showing this error.if u clear that error it will be very helpful in my project. i think function pushbutton 1 callback is causing the problem..so plzzz help

Answer 1

[Geoff Hayes]

vidhya - your pushbutton1 callback has the following two lines of code

FileName = imread('1.jpg');
img=imread(FileName);

One problem may be that MATLAB cannot find the 1.jpg file (you may want to provide the full path to this file). Even if this does work what is actually happening with

FileName = imread('1.jpg');

You are attempting to read an image file named 1.jpg and are storing the result into a variable that is incorrectly FileName. This isn't a file name but an image! And so then on the next line of code

img=imread(FileName);

you are passing a matrix (image) into the imread function.This could be the source of the error. These two lines should just be reduced to

img = imread('1.jpg'); % better yet - provide the full path to the file

Also, remove the global variable. You don't need this especially as you are already using the handles structure to store FileName (or perhaps you want to store the image?).

This line

img=imread(strcat('D/',fname));

will also fail unless fname is actually a file name...And rather than using strcat use fullfile.

[vidhya sagar]

sir,thanks for your help..now the image is actually getting inserted. sir i am going to provide my complete code.will u plzz help me in solving other errors..the same error "error while evaluating uicallback" is showing for button 2..plzz help me in solving this problem.

% --- Executes just before main is made visible.

function main_OpeningFcn(hObject, ~, 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 main (see VARARGIN)

% Choose default command line output for main

handles.output = hObject;

% Update handles structure

guidata(hObject, handles);

% UIWAIT makes main wait for user response (see UIRESUME)

% uiwait(handles.figure1);

% --- Outputs from this function are returned to the command line.

function varargout = main_OutputFcn(~, ~, 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 on button press in pushbutton1.

function pushbutton1_Callback(hObject, ~, handles)

% hObject handle to pushbutton1 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

global fname;

FileName = imread('1.jpg');

img=imread('1.jpg');

axes(handles.axes1);

imshow(img);

fname=FileName;

handles.filename=FileName;

guidata(hObject,handles)

img=imread(strcat('D/',fname));

axes(handles.axes2);

imshow(img);

fname=FileName;

handles.filename=FileName;

guidata(hObject,handles)

% --- Executes on button press in pushbutton2.

function pushbutton2_Callback(~, ~, ~)

% 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)

warning off;

global fname;

%% Procedure for RHS

fid=fopen('fname.txt','w');

fprintf(fid,'%s',fname);

fclose(fid);

test

% --- Executes on button press in pushbutton3.

function pushbutton3_Callback(~, ~, ~)

% hObject handle to pushbutton3 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

% Example 2, Corresponding points

% Load images

%global fname;

fid=fopen('fname.txt','r');

fname=fgets(fid);

fclose(fid);

I1=imread(fname);

I2=imread(strcat('D/',fname));

% Get the Key Points

Options.upright=true;

Options.tresh=0.0001;

Ipts1=OpenSurf(I1,Options);

Ipts2=OpenSurf(I2,Options);

% Put the landmark descriptors in a matrix

D1 = reshape([Ipts1.descriptor],64,[]);

D2 = reshape([Ipts2.descriptor],64,[]);

% Find the best matches

err=zeros(1,length(Ipts1));

cor1=1:length(Ipts1);

cor2=zeros(1,length(Ipts1));

for i=1:length(Ipts1)

distance=sum((D2-repmat(D1(:,i),[1 length(Ipts2)])).^2,1);

[err(i),cor2(i)]=min(distance);

end

% Sort matches on vector distance

[~, ind]=sort(err);

cor1=cor1(ind);

cor2=cor2(ind);

% Show both images

I = zeros([size(I1,1) size(I1,2)*2 size(I1,3)]);

I(:,1:size(I1,2),:)=I1; I(:,size(I1,2)+1:size(I1,2)+size(I2,2),:)=I2;

figure, imshow(I/255); hold on;

% Show the best matches

for i=1:30

c=rand(1,3);

plot([Ipts1(cor1(i)).x Ipts2(cor2(i)).x+size(I1,2)],[Ipts1(cor1(i)).y Ipts2(cor2(i)).y],'-','Color',c)

plot([Ipts1(cor1(i)).x Ipts2(cor2(i)).x+size(I1,2)],[Ipts1(cor1(i)).y Ipts2(cor2(i)).y],'o','Color',c)

end

%%%%%%%%%%%%%%%%%%%%%%%%%

q=I1;

p=I2;

%[R,T] = icp(q,p,10);

%%%%%%%%%%%%%%%%%%%%%%%%%

m = 80; % width of grid

n = m^2; % number of points

[X,Y] = meshgrid(linspace(-2,2,m), linspace(-2,2,m));

X = reshape(X,1,[]);

Y = reshape(Y,1,[]);

Z = sin(X).*cos(Y);

% Create the data point-matrix

D = [X; Y; Z];

% Translation values (a.u.):

Tx = 0.5;

Ty = -0.3;

Tz = 0.2;

% Translation vector

T = [Tx; Ty; Tz];

% Rotation values (rad.):

rx = 0.3;

ry = -0.2;

rz = 0.05;

Rx = [1 0 0;

0 cos(rx) -sin(rx);

0 sin(rx) cos(rx)];

Ry = [cos(ry) 0 sin(ry);

0 1 0;

-sin(ry) 0 cos(ry)];

Rz = [cos(rz) -sin(rz) 0;

sin(rz) cos(rz) 0;

0 0 1];

% Rotation matrix

R = Rx*Ry*Rz;

% Transform data-matrix plus noise into model-matrix

M = R * D + repmat(T, 1, n);

% Add noise to model and data

rng(2912673);

M = M + 0.01*randn(3,n);

D = D + 0.01*randn(3,n);

%% Run ICP (standard settings)

[Ricp, Ticp, ER, t] = icp(M, D, 15);

% Transform data-matrix using ICP result

Dicp = Ricp * D + repmat(Ticp, 1, n);

% Plot model points blue and transformed points red

figure;

subplot(2,2,1);

plot3(M(1,:),M(2,:),M(3,:),'bo',D(1,:),D(2,:),D(3,:),'r.');

axis equal;

xlabel('x'); ylabel('y'); zlabel('z');

title('Red: z=sin(x)*cos(y), blue: transformed point cloud');

% Plot the results

subplot(2,2,2);

plot3(M(1,:),M(2,:),M(3,:),'bo',Dicp(1,:),Dicp(2,:),Dicp(3,:),'r.');

axis equal;

xlabel('x'); ylabel('y'); zlabel('z');

title('ICP result');

% Plot RMS curve

subplot(2,2,[3 4]);

plot(0:15,ER,'--x');

xlabel('iteration#');

ylabel('d_{RMS}');

legend('bruteForce matching');

title(['Total elapsed time: ' num2str(t(end),2) ' s']);

%% Run ICP (fast kDtree matching and extrapolation)

[Ricp, Ticp, ER, t] = icp(M, D, 15, 'Matching', 'kDtree', 'Extrapolation', true);

% Transform data-matrix using ICP result

Dicp = Ricp * D + repmat(Ticp, 1, n);

% Plot model points blue and transformed points red

figure;

subplot(2,2,1);

plot3(M(1,:),M(2,:),M(3,:),'bo',D(1,:),D(2,:),D(3,:),'r.');

axis equal;

xlabel('x'); ylabel('y'); zlabel('z');

title('Red: z=sin(x)*cos(y), blue: transformed point cloud');

% Plot the results

subplot(2,2,2);

plot3(M(1,:),M(2,:),M(3,:),'bo',Dicp(1,:),Dicp(2,:),Dicp(3,:),'r.');

axis equal;

xlabel('x'); ylabel('y'); zlabel('z');

title('ICP result');

% Plot RMS curve

subplot(2,2,[3 4]);

plot(0:15,ER,'--x');

xlabel('iteration#');

ylabel('d_{RMS}');

legend('kDtree matching and extrapolation');

title(['Total elapsed time: ' num2str(t(end),2) ' s']);

%% Run ICP (partial data)

% Partial model point cloud

Mp = M(:,Y>=0);

% Boundary of partial model point cloud

b = (abs(X(Y>=0)) == 2) | (Y(Y>=0) == min(Y(Y>=0))) | (Y(Y>=0) == max(Y(Y>=0)));

bound = find(b);

% Partial data point cloud

Dp = D(:,X>=0);

[Ricp, Ticp, ER, t] = icp(Mp, Dp, 50, 'EdgeRejection', true, 'Boundary', bound, 'Matching', 'kDtree');

% Transform data-matrix using ICP result

Dicp = Ricp * Dp + repmat(Ticp, 1, size(Dp,2));

% Plot model points blue and transformed points red

figure;

subplot(2,2,1);

plot3(Mp(1,not(b)),Mp(2,not(b)),Mp(3,not(b)),'bo',...

Mp(1,b),Mp(2,b),Mp(3,b),'go',...

Dp(1,:),Dp(2,:),Dp(3,:),'r.')

axis equal;

xlabel('x'); ylabel('y'); zlabel('z');

title('Red: z=sin(x)*cos(y), blue: transformed point cloud');

% Plot the results

subplot(2,2,2);

plot3(Mp(1,not(b)),Mp(2,not(b)),Mp(3,not(b)),'bo',...

Mp(1,b),Mp(2,b),Mp(3,b),'go',...

Dicp(1,:),Dicp(2,:),Dicp(3,:),'r.');

axis equal;

xlabel('x'); ylabel('y'); zlabel('z');

title('ICP result');

% Plot RMS curve

subplot(2,2,[3 4]);

plot(0:50,ER,'--x');

xlabel('iteration#');

ylabel('d_{RMS}');

legend('partial overlap');

title(['Total elapsed time: ' num2str(t(end),2) ' s']);

% --- Executes on button press in pushbutton4.

function pushbutton4_Callback(~, ~, ~)

% hObject handle to pushbutton4 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

fid=fopen('fname.txt','r');

fname=fgets(fid);

fclose(fid);

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

binarizedimage320x240=im2bw(imresize(imread(fname),[320 240]));

%imshow(binarizedimage320x240); % Binary 320x240 image

rightPoints=hough(binarizedimage320x240); % show rightPoint (x,y) coordinates from Hough Transform lines

sizeRt = size(rightPoints, 1);

x = zeros(sizeRt, 1);

y = zeros(sizeRt, 1);

for k = 1:sizeRt

x(k) = rightPoints(k,1);

y(k) = rightPoints(k,2);

end

x; % show x values

y; % show y values

% Linear fitting

%p = polyfitn(x,y,'constant x+y') % show p

%xi = 1:2:300;

%yi = polyvaln(p, xi);

%plot(x, y, 'ro', xi, yi, 'b-', 'LineWidth', 3);

%%%%%%%%%%%%%%%%%%%%%%%%%%

str = fname; % Image name in quotes;

image1 = imread(str);

image2 = image1;

%close all;

m=50; % High value implies high Depth

chngd1 = padarray(image1,[0 m],'pre');

chngd2 = padarray(image2,[0 m],'post');

chngd1(:,:,2) = 0;

chngd1(:,:,3) = 0;

chngd2(:,:,1) = 0;

result = chngd1+chngd2;

updated = result(:,m+1:length(result)-m,:);

imwrite(updated,['3D_' str]);

imshow(['3D_' str]);

title('3D image');

[Geoff Hayes]

that's a lot of code...

In your pushbutton1 callback, why are you still doing

FileName = imread('1.jpg');
img=imread('1.jpg');

FileName is an inappropriately named variable for the image. Why read the image twice? For what purpose? And then you assign this to the global variable fname. Why do this? This isn't a file name. And you have the handles structure that you are already assigning this image too. Don't duplicate and don't use global variables.

Now in your pushbutton2 callback, you do

% --- Executes on button press in pushbutton2.
function pushbutton2_Callback(~, ~, ~)
% 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)
warning off;
global fname;
%% Procedure for RHS
fid=fopen('fname.txt','w');
fprintf(fid,'%s',fname);
fclose(fid);
test

Look what you are writing to file:

fprintf(fid,'%s',fname);

fname is an image (matrix)...it isn't a string. So that is probably the source of the error. There is also a call to test. What is this? That will throw an error too...