Design

Low Pass Filter

Apply low pass filter to smooth images and reduce noise with adjustable blur algorithms

file· File resultOpen tool

Quick start

Call this tool from your code in three languages.

cURL

# 1) Request a presigned URL → returns { uploadUrl, storageKey }
curl -X POST 'https://api.elysiatools.com/api/upload/presign/image-low-pass' \
  -H 'Content-Type: application/json' \
  -d '{"filename":"imageFile.ext","contentType":"application/octet-stream","size":12345}'

# 2) PUT the file bytes directly to the presigned uploadUrl
curl -X PUT '<presigned uploadUrl>' \
  --data-binary @/path/to/file.ext

# 3) Call the tool, passing the returned storageKey for each file field
curl -X POST 'https://api.elysiatools.com/en/api/tools/image-low-pass' \
  -F 'imageFile=uploads/2026/01/01/your-tool-1700000000000-abc123.ext' \
  -F 'algorithm=gaussian' \
  -F 'radius=1.5' \
  -F 'strength=0.4' \
  -F 'iterations=1' \
  -F 'preserveEdges=false' \
  -F 'channels=all' \
  -F 'format=original' \
  -F 'quality=95'

Browse tools

Design

Low Pass Filter

Apply low pass filter to smooth images and reduce noise with adjustable blur algorithms

file· File resultOpen tool

Quick start

Call this tool from your code in three languages.

cURL

# 1) Request a presigned URL → returns { uploadUrl, storageKey }
curl -X POST 'https://api.elysiatools.com/api/upload/presign/image-low-pass' \
  -H 'Content-Type: application/json' \
  -d '{"filename":"imageFile.ext","contentType":"application/octet-stream","size":12345}'

# 2) PUT the file bytes directly to the presigned uploadUrl
curl -X PUT '<presigned uploadUrl>' \
  --data-binary @/path/to/file.ext

# 3) Call the tool, passing the returned storageKey for each file field
curl -X POST 'https://api.elysiatools.com/en/api/tools/image-low-pass' \
  -F 'imageFile=uploads/2026/01/01/your-tool-1700000000000-abc123.ext' \
  -F 'algorithm=gaussian' \
  -F 'radius=1.5' \
  -F 'strength=0.4' \
  -F 'iterations=1' \
  -F 'preserveEdges=false' \
  -F 'channels=all' \
  -F 'format=original' \
  -F 'quality=95'

Name	Type	Required	Description
imageFile	fileupload required	Yes	Upload any image file (JPEG, PNG, WebP, GIF, BMP, TIFF) to smooth and reduce noise
algorithm	select	No	Choose the blur algorithm. Gaussian works well for most images
radius	range	No	Radius of the blur effect. Higher values create stronger smoothing
strength	range	No	Strength of the blur effect. Higher values apply more aggressive smoothing
iterations	number	No	Number of blur passes. More iterations = smoother result
preserveEdges	checkbox	No	Maintain edge detail while smoothing flat areas
channels	select	No	Choose which color channels to process
format	select	No	Choose output format or keep original. PNG recommended for maximum quality
quality	number	No	Output quality for lossy formats (JPEG, WebP). Higher = better quality but larger file size

Low Pass Filter

Quick start

Low Pass Filter

Quick start

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Parameters

Response format

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