This code is a Python script that uses the stegano library to perform steganography on image files. Steganography is the process of hiding information within other data, in this case, hiding a text message within an image file.
The script defines a class called ImageSteganography which has four methods: hide_msg_png, reveal_msg_png, hide_msg_jpg, and reveal_msg_jpg. These methods are used to hide and reveal messages in PNG and JPG image files, respectively.
The __init__ method of the class takes an optional parameter img_dir, which is the directory where the images are stored. If no value is provided, it defaults to 'img/'. The img_dir attribute is then set to the value provided or the default.
The hide_msg_png method takes in three parameters: the img file name, the msg that needs to be hidden, and an optional secret_img file name. If the secret_img is not provided, it creates a new file name by taking the original file name and appending '_secret.png' to it. It then uses the lsb.hide() method of the stegano library to hide the message within the image, and saves the resulting image with the secret_img file name.
The reveal_msg_png method takes in one parameter secret_img the name of the secret image file. It uses the lsb.reveal() method of the stegano library to reveal the message hidden within the image.
The hide_msg_jpg and reveal_msg_jpg methods work in a similar way, but they use the exifHeader module of the stegano library to hide and reveal messages in JPG images.
In the if __name__ == '__main__': block, the script creates an instance of the ImageSteganography class, sets some image and message constants, and then uses the class's methods to hide and reveal messages in PNG and JPG images. The result of each reveal method is printed to the console. If an error occurs during the execution of the script, an error message will be printed.
- Python 3.x+: the main programming language that was used
- stegano: to perform steganography on image files.