Everything you need to know about Box Blur
Box Blur smooths your image by averaging pixels within a rectangular area. It's a fast, straightforward blur that creates an even, uniform softening effect. While not as natural-looking as Gaussian blur, it's computationally efficient and useful for quick softening or as a base for other effects.
Parameters
- Radius
Controls the blur intensity. At 0, no blur is applied. Higher values (up to 50) create increasingly strong blur effects. Each pixel is averaged with all neighbors within this radius.
How It Works
Box Blur applies a two-pass algorithm: first horizontally, then vertically. Each pixel becomes the average of itself and its neighbors within the specified radius, creating a uniform smoothing effect across the entire image.
Tips
- Use low values (2–5) for subtle smoothing or noise reduction
- Higher values create a frosted glass effect
- For more natural-looking blur, consider Gaussian Blur instead
- Box Blur is faster than Gaussian Blur – useful for large images or batch processing