how can solve this error?

hi

i used this code

a=imread('6.jpg');
b= imread('text.png');
% b=im2bw(a);
[x y]=size(a);
a1=imresize(b,[x y]);
b1=zeros(x,y,'uint8');
for i=1:x
   for j=1:y
    
    b1(i,j)= a1(i,j)+a(i,j);
end
    
end
figure;imshow(a),title('first image')
figure;imshow(b),title('second image')
figure;imshow(b1),title('after add')

but it give me the error

Error using  + 
Integers can only be combined with integers of the same class, or scalar doubles.

how solve it?

Answer 1

[James Long]

can you attach a screenshot of the variable types?

it looks like you are trying to add a variable of type double to a variable of type unit8 or something along those lines. also, try to not designate the memory for b1 as type unit8 first. Rather, create b1 in the nested for-loop THEN change the variable type after the foor loop executes.

Also, this may help: https://www.mathworks.com/help/matlab/ref/typecast.html