My code based on LSB (the least significant bit) 

The script consists mainly of three functions to hide the message in the image:

The function obtbytim(img):  in this function obtains the three colors of each pixel in the image.


The function enviobyte (byte1, img): in this function writes the new values ​​of the colors.

The function esconder(imagen, escon): loading the hidden message, is converted to bits and then use the function enviobyte () to write new values ​​in the image.

The first for from the function esconder() serves to determine the length of the message and the second to go in getting the message bit