Design

Image Linear Transformation

Apply linear transformation (a * input + b) to adjust image levels, brightness, and contrast

file· File resultOpen tool

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-linear' \
  -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-linear' \
  -F 'imageFile=/path/to/file.ext' \
  -F 'multiplier=1' \
  -F 'offset=0' \
  -F 'channels=all' \
  -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-linear

Parameters

Name	Type	Required	Description
imageFile	fileupload required	Yes	Upload any image file to apply linear transformation
multiplier	text	No	Multiplier value (a). Can be single number for all channels or comma-separated values for each channel. Formula: result = a * input + b
offset	text	No	Offset value (b). Can be single number for all channels or comma-separated values for each channel. Formula: result = a * input + b
channels	select	No	Apply transformation to specific channels or all channels

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-linear": {
      "name": "image-linear",
      "description": "Apply linear transformation (a * input + b) to adjust image levels, brightness, and contrast",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=image-linear",
      "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-linear",
    "arguments": {
  "imageFile": "https://example.com/file.ext",
  "multiplier": "1",
  "offset": "0",
  "channels": "all",
  "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).

Browse tools Open tool