Victor works as a professional Ethical Hacker for SecureEnet Inc. He has been assigned a job to test an image, in which some secret information is hidden, using Steganography. Victor performs the following techniques to accomplish the task:

1. Smoothening and decreasing contrast by averaging the pixels of the area where significant color transitions occurs.

2. Reducing noise by adjusting color and averaging pixel value.

3. Sharpening, Rotating, Resampling, and Softening the image.

Which of the following Steganography attacks is Victor using?