VC program for color images

Question

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I was writing a program for my college project.The program'saim is to hid color images using meaningful shares.So in order to hide an image.I used two cover images.I was supposed to write two function programs for the main programs.I am unable to accept values returned from the first function SecCodTbl.

Here is the code for the main program %main.m %Clear Memory & Command Window clc; clear all; close all;

%Read input color image(Secret Image) inpsi=imread('lenaV.jpg');

%cmy output opsi=rgb2cmy(inpsi); figure;imshow(opsi);

%Read input color image(Cover Image A) inpca=imread('veg.jpg');

%cmy output opca=rgb2cmy(inpca); opca=imresize(opca,[512 512]); figure;imshow(opca);

%Read input color image(Cover Image B) inpcb=imread('Castle.png');

%cmy output opcb=rgb2cmy(inpcb); figure;imshow(opcb); share1=zeros(512,512,3); share2=zeros(512,512,3); %Secret coding table [share1, share2] = SecCodTbl(opsi); figure;imshow(share1); figure;imshow(share2);

and the function SecCodTbl %SecCodTbl.m function [share1, share2] = SecCodTbl(inImg)

s=size(inImg); for i=1:s(1) for j=1:s(2) if(inImg(i,j)=='w') share1(2*i-1,2*j-1)='y'; share1(2*i-1,2*j)='c'; share1(2*i,2*j-1)='w'; share1(2*i,2*j)='m'; share2(2*i-1,2*j-1)='y'; share2(2*i-1,2*j)='c'; share2(2*i,2*j-1)='w'; share2(2*i,2*j)='m';

       elseif(inImg(i,j)=='c')
           share1(2*i-1,2*j-1)='y';
           share1(2*i-1,2*j)='c';
           share1(2*i,2*j-1)='w';
           share1(2*i,2*j)='m';
           share2(2*i-1,2*j-1)='y';
           share2(2*i-1,2*j)='w';
           share2(2*i,2*j-1)='c';
           share2(2*i,2*j)='m';
       elseif(inImg(i,j)=='m')
           share1(2*i-1,2*j-1)='y';
           share1(2*i-1,2*j)='c';
           share1(2*i,2*j-1)='w';
           share1(2*i,2*j)='m';
           share2(2*i-1,2*j-1)='y';
           share2(2*i-1,2*j)='c';
           share2(2*i,2*j-1)='m';
           share2(2*i,2*j)='w';
       elseif(inImg(i,j)=='y')
           share1(2*i-1,2*j-1)='y';
           share1(2*i-1,2*j)='c';
           share1(2*i,2*j-1)='w';
           share1(2*i,2*j)='m';
           share2(2*i-1,2*j-1)='y';
           share2(2*i-1,2*j)='c';
           share2(2*i,2*j-1)='m';
           share2(2*i,2*j)='w';
       elseif(inImg(i,j)=='b')
           share1(2*i-1,2*j-1)='y';
           share1(2*i-1,2*j)='c';
           share1(2*i,2*j-1)='w';
           share1(2*i,2*j)='m';
           share2(2*i-1,2*j-1)='y';
           share2(2*i-1,2*j)='m';
           share2(2*i,2*j-1)='w';
           share2(2*i,2*j)='c';
       elseif(inImg(i,j)=='r')
           share1(2*i-1,2*j-1)='y';
           share1(2*i-1,2*j)='c';
           share1(2*i,2*j-1)='w';
           share1(2*i,2*j)='m';
           share2(2*i-1,2*j-1)='m';
           share2(2*i-1,2*j)='c';
           share2(2*i,2*j-1)='w';
           share2(2*i,2*j)='y';
       elseif(inImg(i,j)=='g')
           share1(2*i-1,2*j-1)='y';
           share1(2*i-1,2*j)='c';
           share1(2*i,2*j-1)='w';
           share1(2*i,2*j)='m';
           share2(2*i-1,2*j-1)='c';
           share2(2*i-1,2*j)='y';
           share2(2*i,2*j-1)='w';
           share2(2*i,2*j)='m';
       elseif(inImg(i,j)=='k')
           share1(2*i-1,2*j-1)='y';
           share1(2*i-1,2*j)='c';
           share1(2*i,2*j-1)='w';
           share1(2*i,2*j)='m';
           share2(2*i-1,2*j-1)='m';
           share2(2*i-1,2*j)='w';
           share2(2*i,2*j-1)='c';
           share2(2*i,2*j)='y'
       end
    end
end