How to transform double to unit8

for i = 1:1:291        %go through rows
    for j = 1:1:240     %columns
        img_heq(i, j) = T(img(i,j));
    end
end

ERROR: Variable img_heq must be of data type uint8. It is currently of type double.

How to recity the varibale error problem.

Answer 1

[KALYAN ACHARJYA]

im2uint8

[Sivakumar Rajagopal]

for i = 1:1:291        %go through rows
    for j = 1:1:240     %columns
        img_heq(i, j) = T(img(i,j));
        img_heq=im2uint8(img_heq(i,j));
    end
end


Error: Variable img_heq must be of size [291 240]. It is currently of size [1 1]. Check where the variable is assigned a value.