adjust_brightness
Adjust image brightness by modifying a factor value to lighten or darken images for better visibility and visual quality.
Instructions
调整图片亮度
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| image_source | Yes | 图片源，可以是文件路径或base64编码的图片数据 | |
| factor | Yes | 亮度调整因子，1.0为原始亮度，>1.0变亮，<1.0变暗 |
Implementation Reference
- tools/color_adjust.py:161-208 (handler)Core handler function that loads the image, applies brightness adjustment using PIL ImageEnhance.Brightness, processes output, and returns JSON result.async def adjust_brightness(image_source: str, factor: float) -> list[TextContent]: """ 调整图片亮度 Args: image_source: 图片数据（base64编码）或文件路径 factor: 亮度调整因子（0.0-2.0） Returns: 调整后的图片数据 """ try: # 验证参数 if not image_source: raise ValidationError("图片数据或路径不能为空") if not validate_numeric_range(factor, 0.0, 2.0): raise ValidationError(f"亮度因子必须在0.0-2.0范围内: {factor}") # 加载图片 image = processor.load_image(image_source) # 调整亮度 enhancer = ImageEnhance.Brightness(image) enhanced_image = enhancer.enhance(factor) # 输出处理后的图片 output_info = processor.output_image(enhanced_image, "brightness") result = { "success": True, "message": f"亮度调整成功: 因子 {factor}", "data": { **output_info, "brightness_factor": factor, "size": image.size } } return [TextContent(type="text", text=json.dumps(result, ensure_ascii=False))] except ValidationError as e: error_result = { "success": False, "error": f"参数验证失败: {str(e)}" } return [TextContent(type="text", text=json.dumps(error_result, ensure_ascii=False))]
- main.py:384-398 (registration)Registers the 'adjust_brightness' tool with FastMCP server using @mcp.tool decorator, defines input parameters with descriptions, and delegates execution to the imported handler via safe_run_async.@mcp.tool() def adjust_brightness( image_source: Annotated[str, Field(description="图片源，可以是文件路径或base64编码的图片数据")], factor: Annotated[float, Field(description="亮度调整因子，1.0为原始亮度，>1.0变亮，<1.0变暗", gt=0)] ) -> str: """调整图片亮度""" try: result = safe_run_async(color_adjust_brightness(image_source, factor)) return result[0].text except Exception as e: return json.dumps({ "success": False, "error": f"调整亮度失败: {str(e)}" }, ensure_ascii=False, indent=2)
- tools/color_adjust.py:25-44 (schema)Explicit JSON schema definition for the adjust_brightness tool input validation, part of get_color_adjust_tools() function.Tool( name="adjust_brightness", description="调整图片亮度", inputSchema={ "type": "object", "properties": { "image_source": { "type": "string", "description": "图片数据（base64编码）或文件路径" }, "factor": { "type": "number", "description": "亮度调整因子（0.0-2.0，1.0为原始亮度）", "minimum": 0.0, "maximum": 2.0 } }, "required": ["image_source", "factor"] } ),