Image Transmission MATLAB code

Hi I am trying to use bpsk to transmitt an image in a problem I am working on but I have a problem with reshaping the image back.

my code

clear all close all imag = imread('saina.jpg');

img= imag,:,;

[z zz t] = size( img);

bin = dec2bin(img, 8); [z zz t] = size( img);

bin = dec2bin(img, 8); %de2bi()has lower resolution%

[s ss] = size(bin);

sigg = reshape( bin', 1,s*ss );

sig = str2num(sigg'); % if no transpose then sig will be Inf%

M = modem.pskmod(2);

sig1 = modulate(M,sig);

l=length(sig1);

z=modem.pskdemod(2); %demodulation object

kr= demodulate(z,sig); %demodulating the data kr1 = (sig+1)/2;

newrsig = reshape(kr', ss , s);

newrsigg= newrsig';

final = bin2dec ( num2str(newrsigg) );

final = reshape ( final', z ,zz , t);

figure, imshow (uint8(final,:,)) ,

after running this code i get the following error messge

??? Error using ==> reshape Conversion to double from modem.pskdemod is not possible.

Error in ==> Untitled4 at 41 final = reshape ( final', z ,zz , t);