Everything you need to know about Denoise (3×3 blur)
Denoise applies a simple 3×3 averaging blur to reduce image noise. This quick and lightweight filter smooths out pixel-level noise by averaging each pixel with its eight immediate neighbors. It's a fast, basic solution for minor noise issues.
Parameters
- Strength
Controls how much of the blurred (denoised) result is blended with the original. At 0, no change is visible. At 1.0, the full blur is applied. Use intermediate values (0.3–0.6) to reduce noise while preserving more detail.
How It Works
The filter samples a 3×3 grid of pixels centered on each pixel, averages all 9 values together, and blends the result with the original based on the strength setting. This simple averaging effectively smooths out random noise variations.
Tips
- Best for subtle noise on low-ISO images or web graphics
- Use lower strength (0.3–0.5) to preserve edges and fine detail
- For heavy noise, consider applying multiple passes or using a stronger blur filter
- This is a fast, one-pass filter – ideal for quick cleanups