I have written the code to convert the RGB to different color ,in the command window result is correct but the resulting image was not displayed

clc
close all;
clear all;
[fname path]=uigetfile('*.*','insert the pic');
a=imread(fname);
imshow(a)
w=0;d=0;z=0;
b=zeros(size(a,1),size(a,2),size(a,3));

for i=1:size(a,1)
    for j=1:size(a,2)
        for k=1:size(a,3)
         if a(i,j,k)<=80
             b(i,j,k)=34;
             w=w+1;
         elseif a(i,j,k)<=120
          b(i,j,k)=80;
             d=d+1;
         elseif a(i,j,k)<=255
            b(i,j,k)=27;
             z=z+1;
         end
        end
    end
end
figure;
imshow(b);

Answer 1

[Vandana Rajan]

Hi,

It seems that there are some problems with the conditions you are giving.

a(i,j,k)<=120 includes all values below 120, which includes values below 80 too. May be you are thinking of values between 81 and 120? In that case you need to give 80<a(i,j,k)<=120. Similarly for a(i,j,k)<=255.

[sudarshan r]

hi,vandana rajan the IF condition you have written in the matlab as 80<a(i,j,k)<=120 is not accepted, it only allows a(i,j,k)<=120 as this way, writing the scalar value on the left side is illegal please find this.

[Vandana Rajan]

yeah. for that you need to write (a(i,j,k)>80 && a(i,j,k)<=120). What I provided above was the logic and not the exact syntax.