使用 google drive 或者 fileSystem 读取图片并分析图片内容

读取文件，给文件赋值到对应的fileName，后面节点直接读取

json
{
  "nodes": [
    {
      "parameters": {
        "rule": {
          "interval": [
            {}
          ]
        }
      },
      "type": "n8n-nodes-base.scheduleTrigger",
      "typeVersion": 1.2,
      "position": [
        0,
        0
      ],
      "id": "67be5034-ee30-4e39-a831-151d934f32cf",
      "name": "Schedule Trigger"
    },
    {
      "parameters": {
        "operation": "download",
        "fileId": {
          "__rl": true,
          "value": "1XwoXUYsZT0RL2AEjyY6iU9BGHC2oE14z",
          "mode": "list",
          "cachedResultName": "Generated Image August 27, 2025 - 9_04PM (1).jpeg",
          "cachedResultUrl": "https://drive.google.com/file/d/1XwoXUYsZT0RL2AEjyY6iU9BGHC2oE14z/view?usp=drivesdk"
        },
        "options": {}
      },
      "type": "n8n-nodes-base.googleDrive",
      "typeVersion": 3,
      "position": [
        208,
        16
      ],
      "id": "578d350c-7955-4eef-a83b-fa1a1ac1693b",
      "name": "Download file",
      "credentials": {
        "googleDriveOAuth2Api": {
          "id": "ZpIdB1GDR3CTUSKi",
          "name": "Google Drive account"
        }
      }
    },
    {
      "parameters": {
        "fileSelector": "/home/node/test.png",
        "options": {
          "fileName": "data"
        }
      },
      "type": "n8n-nodes-base.readWriteFile",
      "typeVersion": 1,
      "position": [
        512,
        320
      ],
      "id": "f2fc84f6-7fae-48d3-9df0-1d4e66547229",
      "name": "Read/Write Files from Disk",
      "disabled": true
    },
    {
      "parameters": {
        "fileSelector": "/home/node/test.png",
        "options": {}
      },
      "type": "n8n-nodes-base.readWriteFile",
      "typeVersion": 1,
      "position": [
        1056,
        16
      ],
      "id": "74562e97-05c9-466a-bde3-d5fc7e40d5dc",
      "name": "Read/Write Files from Disk1",
      "disabled": true
    },
    {
      "parameters": {
        "operation": "write",
        "fileName": "/home/node/test.png",
        "options": {}
      },
      "type": "n8n-nodes-base.readWriteFile",
      "typeVersion": 1,
      "position": [
        416,
        16
      ],
      "id": "c15472d6-7801-4ec0-acc1-417f74f73c7e",
      "name": "Read/Write Files from Disk2",
      "disabled": true
    },
    {
      "parameters": {
        "resource": "image",
        "operation": "analyze",
        "modelId": {
          "__rl": true,
          "value": "models/gemma-3-27b-it",
          "mode": "list",
          "cachedResultName": "models/gemma-3-27b-it"
        },
        "text": "=What's in this image?\n",
        "inputType": "binary",
        "simplify": false,
        "options": {}
      },
      "type": "@n8n/n8n-nodes-langchain.googleGemini",
      "typeVersion": 1,
      "position": [
        1696,
        128
      ],
      "id": "0c0fe167-9a0e-450c-a078-8f6ae70531fd",
      "name": "Analyze image",
      "credentials": {
        "googlePalmApi": {
          "id": "SQnOISJFY4oDuqS7",
          "name": "Google Gemini(PaLM) Api account"
        }
      }
    },
    {
      "parameters": {
        "descriptionType": "manual",
        "toolDescription": "Analyze image in Google Gemini",
        "resource": "image",
        "operation": "analyze",
        "modelId": {
          "__rl": true,
          "mode": "list",
          "value": "models/gemma-3-27b-it",
          "cachedResultName": "models/gemma-3-27b-it"
        },
        "text": "={{ /*n8n-auto-generated-fromAI-override*/ $fromAI('Text_Input', ``, 'string') }}",
        "imageUrls": "={{ /*n8n-auto-generated-fromAI-override*/ $fromAI('URL_s_', ``, 'string') }}",
        "options": {}
      },
      "id": "5d320d31-21de-4347-adc1-04d0b9e619e3",
      "name": "IMG",
      "type": "@n8n/n8n-nodes-langchain.googleGeminiTool",
      "position": [
        1440,
        288
      ],
      "typeVersion": 1,
      "credentials": {
        "googlePalmApi": {
          "id": "SQnOISJFY4oDuqS7",
          "name": "Google Gemini(PaLM) Api account"
        }
      }
    }
  ],
  "connections": {
    "Schedule Trigger": {
      "main": [
        [
          {
            "node": "Download file",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Download file": {
      "main": [
        [
          {
            "node": "Read/Write Files from Disk2",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Read/Write Files from Disk": {
      "main": [
        []
      ]
    },
    "Read/Write Files from Disk1": {
      "main": [
        [
          {
            "node": "Analyze image",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Read/Write Files from Disk2": {
      "main": [
        [
          {
            "node": "Read/Write Files from Disk1",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  },
  "pinData": {},
  "meta": {
    "templateCredsSetupCompleted": true,
    "instanceId": "b3a8e0e1f9ab1bfe3a36f231f676f78bb30a519d2b21e6c530c0eee8ebb4a5d0"
  }
}