How does a bilateral filter differ from a standard Gaussian blur?

A standard blur averages pixels regardless of their color, which causes edges to become fuzzy. A bilateral filter considers both the distance between pixels and the difference in their intensity, allowing it to smooth flat areas while leaving sharp edges untouched.

What is the difference between Spatial Sigma and Range Sigma?

Spatial Sigma determines how far the filter looks for neighboring pixels to average; higher values create stronger smoothing. Range Sigma determines how much intensity difference is allowed between pixels; higher values preserve fewer edges.

Can I process multiple images at once?

No, this tool is designed to process one image file at a time to ensure high-quality, precise filtering results.

What is the recommended output format?

PNG is recommended if you want to maintain maximum image quality without compression artifacts, though JPEG and WebP are available for smaller file sizes.

What is the maximum file size I can upload?

You can upload image files up to 20MB in size.

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Bilateral Filter

Apply bilateral filter for edge-preserving smoothing that reduces noise while maintaining image details

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9 options

FilesUpload source files for this workflow.1

Image FilefileRequired

Single file max size: 20 MBSupported types: image/jpeg, image/png, image/webp, image/gif, image/bmp, image/tiff

Upload any image file (JPEG, PNG, WebP, GIF, BMP, TIFF) to apply edge-preserving bilateral filtering

SettingsAdjust formats, ranges, numbers, and modes.7

Spatial SigmarangeOptional

0.510

Controls spatial smoothing. Higher values smooth larger areasRange SigmarangeOptional

5100

Controls edge preservation. Higher values preserve fewer edgesKernel SizerangeOptional

315

Size of the bilateral filter kernel (must be odd). Larger kernels consider more neighborsFilter IterationsnumberOptionalNumber of bilateral filter passes. More iterations = stronger smoothingChannel ProcessingselectOptionalChoose which color channels to processOutput FormatselectOptionalChoose output format or keep original. PNG recommended for maximum qualityQuality (1-100)numberOptionalOutput quality for lossy formats (JPEG, WebP). Higher = better quality but larger file size

TogglesEnable or disable optional behavior.1

Preserve DetailscheckboxOptionalEnabled when checkedMaintain fine details and textures while smoothing

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Bilateral Filter

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1. Denoising Night Photography

2. Portrait Skin Smoothing

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