
What Are JPEG Compression Artifacts?
• Blockiness: JPEG divides images into 8×8 pixel squares, and heavy compression can cause visible edges or “blocks” between these squares, especially in areas with smooth gradients (e.g., skies).
• Color Banding: Subtle color transitions may appear as distinct bands due to reduced color information.
• Blurring: Fine details can be lost, making edges or textures appear soft or smeared.
• Noise or Halos: Around high-contrast edges, you might see ringing or halo-like effects.–Mr. Grok