PDF Tools

PDF Denoise

Remove visual noise from scanned PDF pages — salt-and-pepper speckle, random grain, and faint background haze — using real image-processing algorithms. Text pages are preserved as searchable vector content.

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Quick start

Call this tool from your code in three languages.

cURL

# 1) Upload each file first → returns { filePath }
curl -X POST 'https://api.elysiatools.com/upload/pdf-denoise' \
  -F 'file=@/path/to/sourceFile.ext'

# 2) Call the tool with the returned filePath values
curl -X POST 'https://api.elysiatools.com/en/api/tools/pdf-denoise' \
  -F 'sourceFile=/public/samples/pdf/sample-multipage.pdf' \
  -F 'mode=auto' \
  -F 'strength=2' \
  -F 'rasterizeText=false' \
  -F 'pageRange='

API reference

Send a POST request with your inputs as JSON. File parameters require a separate upload first.

Endpoint

HTTP

POST https://api.elysiatools.com/en/api/tools/pdf-denoise

Parameters

Name	Type	Required	Description
sourceFile	fileupload required	Yes	—
mode	select	Yes	Auto: balanced median + despeckle (preserves tone). Median: best for salt-and-pepper/impulse noise. Binarize: Otsu threshold turns faint backgrounds white and text solid black.
strength	number	No	Number of 3x3 median filter passes (1–3). Higher = stronger noise removal but more softening. Ignored in Binarize mode.
rasterizeText	select	No	By default text pages are preserved as searchable vector content (not denoised). Enable this only for OCR'd scans whose underlying image is noisy, accepting loss of text selectability.

MCP integration

Add this tool to your Model Context Protocol server so AI agents can list and call it.

Server configuration

Add this block to your MCP client configuration:

mcp.json

{
  "mcpServers": {
    "elysiatools-pdf-denoise": {
      "name": "pdf-denoise",
      "description": "Remove visual noise from scanned PDF pages — salt-and-pepper speckle, random grain, and faint background haze — using real image-processing algorithms. Text pages are preserved as searchable vector content.",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=pdf-denoise",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

List available tools

After connecting to the SSE endpoint, list the exposed tools:

tools/list

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/list"
}

Call this tool

Invoke the tool by its id, passing arguments built from its parameters:

tools/call

{
  "jsonrpc": "2.0",
  "id": 2,
  "method": "tools/call",
  "params": {
    "name": "pdf-denoise",
    "arguments": {
  "sourceFile": "/public/samples/pdf/sample-multipage.pdf",
  "mode": "auto",
  "strength": 2,
  "rasterizeText": "false",
  "pageRange": ""
}
  }
}

Chain multiple tools in one session with a comma-separated toolId list, e.g. /mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp (max 20).

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