Encrypting and Decrypting images using Python, Tkinter for creating a GUI, the enumerate method for labeling image values, and XOR operator for encryption and decryption without providing code.

1. **Python Imaging Library (PIL) or Pillow**:

  - PIL or Pillow is a Python library used for opening, manipulating, and saving many different image file formats. It provides a convenient interface to do basic image processing tasks.

2. **Tkinter for GUI**:

  - Tkinter is Python's de facto standard GUI (Graphical User Interface) package. It allows you to create windows, buttons, labels, etc., for your application.

  - You can create a Tkinter window with buttons for encryption, decryption, and selecting images.

3. **Enumerate Method for Labeling Image Values**:

  - The enumerate method in Python is used to loop over an iterable and provide both the index and value at the same time.

  - In the context of image processing, you would iterate over the pixels of an image, getting their coordinates and values.

4. **XOR Operation for Encryption and Decryption**:

  - XOR (exclusive OR) is a bitwise operation that can be used for encryption and decryption.

  - For encryption, you XOR each pixel value of the image with a key. This scrambles the pixel values.

  - For decryption, you XOR the encrypted pixel values with the same key, which should result in the original pixel values.

Here's an overview of the steps involved in the process:

- **Select an Image**: Provide a way for the user to select an image file using Tkinter's file dialog.

- **Read Image Pixels**: Load the selected image and read its pixel values. You can use PIL or Pillow for this task.

- **Encrypt Image**: Iterate over each pixel of the image and perform XOR operation with a key. This will scramble the pixel values, thereby encrypting the image.

- **Decrypt Image**: To decrypt the image, perform XOR operation again with the same key. This should restore the original pixel values.

- **Display Images**: Use Tkinter to display both the encrypted and decrypted images in the GUI.