Retrieving Message and Conversion to Text
Once a message has been retrieved it has to be converted in to the original message. This process can be done by reading
the embedded data from the file. The read data will be in bytes format. This can be done by extract the pixels of output
image in one array. Decoding will be done in same manner as the reversal of encoding process. After that bytes are
converted to text by reading one by one byte to get each character in the message.