Design

Image Normalise

Normalise image histogram to enhance contrast by stretching the intensity range (British spelling)

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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/image-normalise' \
  -F 'file=@/path/to/imageFile.ext'

# 2) Call the tool with the returned filePath values
curl -X POST 'https://api.elysiatools.com/en/api/tools/image-normalise' \
  -F 'imageFile=/path/to/file.ext' \
  -F 'autoContrast=true' \
  -F 'lowerPercentile=1' \
  -F 'upperPercentile=99' \
  -F 'format=original' \
  -F 'quality=95'

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/image-normalise

Parameters

Name	Type	Required	Description
imageFile	fileupload required	Yes	Upload any image file (JPEG, PNG, WebP, GIF, BMP, TIFF) to enhance contrast through histogram normalisation
autoContrast	checkbox	No	Automatically enhance contrast using 1% and 99% percentiles (recommended for most images)
lowerPercentile	range	No	Percentage of darkest pixels to ignore (0.1% - 10%). Lower values preserve more shadow detail
upperPercentile	range	No	Percentage of brightest pixels to ignore (90% - 99.9%). Higher values preserve more highlight detail

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-image-normalise": {
      "name": "image-normalise",
      "description": "Normalise image histogram to enhance contrast by stretching the intensity range (British spelling)",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=image-normalise",
      "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": "image-normalise",
    "arguments": {
  "imageFile": "https://example.com/file.ext",
  "autoContrast": true,
  "lowerPercentile": 1,
  "upperPercentile": 99,
  "format": "original",
  "quality": 95
}
  }
}

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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