Binary to grayscale and then to RGB

ImageObject = imread(input_video_file);

img=ImageObject;

grayImage = rgb2gray(img); thresholdLevel = graythresh(grayImage); binaryImage = im2bw( grayImage, thresholdLevel); binaryImageArray = cat(3,binaryImage); A=binaryImageArray(:)';

% A contain a stream of bits of image. Plz tell that how can i convert this stream "A" to Colourmap image i.e back to RGB; i use B=A'; Sh=reshape(B,Row,Column,Page); UitPl=uint8(255*Sh); imshow(UitPl); but it gives me only Black and white Picture. Plz help