在n8n中使用Gemini AI处理图像和PDF的5种方法
高级
这是一个Building Blocks, AI领域的自动化工作流，包含 28 个节点。主要使用 Set, Filter, SplitOut, HttpRequest, ManualTrigger 等节点，结合人工智能技术实现智能自动化。 在n8n中使用Gemini AI处理图像和PDF的5种方法
前置要求
- •可能需要目标 API 的认证凭证
- •Google Gemini API Key
使用的节点 (28)
工作流预览
可视化展示节点连接关系，支持缩放和平移
导出工作流
复制以下 JSON 配置到 n8n 导入，即可使用此工作流
{
"meta": {
"instanceId": "d4d7965840e96e50a3e02959a8487c692901dfa8d5cc294134442c67ce1622d3",
"templateCredsSetupCompleted": true
},
"nodes": [
{
"id": "eec7d9b8-d1e3-4a43-9e0d-f6d750e736b5",
"name": "当点击\"测试工作流\"时",
"type": "n8n-nodes-base.manualTrigger",
"position": [
-640,
-400
],
"parameters": {},
"typeVersion": 1
},
{
"id": "5276a2cf-3d42-409a-800d-9080aa5e1a09",
"name": "Google Gemini聊天模型",
"type": "@n8n/n8n-nodes-langchain.lmChatGoogleGemini",
"position": [
1820,
-60
],
"parameters": {
"options": {},
"modelName": "models/gemini-2.0-flash"
},
"credentials": {
"googlePalmApi": {
"id": "BB5B0v4OaFQeEt3C",
"name": "Google Gemini(PaLM) Api account"
}
},
"typeVersion": 1
},
{
"id": "1b89dca9-1137-4e0f-b3ff-1b354152c128",
"name": "AI Agent",
"type": "@n8n/n8n-nodes-langchain.agent",
"position": [
1880,
-260
],
"parameters": {
"text": "={{ $('Loop Over Items').all() }}",
"options": {
"passthroughBinaryImages": true
},
"promptType": "define"
},
"typeVersion": 1.7
},
{
"id": "00348203-882f-48da-8127-e57cf30c5b20",
"name": "从Unsplash获取图片2",
"type": "n8n-nodes-base.httpRequest",
"position": [
1160,
-280
],
"parameters": {
"url": "={{ $json.url }}",
"options": {}
},
"typeVersion": 4.2
},
{
"id": "1b07777f-954b-4471-ab4b-070c902c0bc1",
"name": "分离输出",
"type": "n8n-nodes-base.splitOut",
"position": [
500,
-280
],
"parameters": {
"options": {},
"fieldToSplitOut": "urls"
},
"typeVersion": 1
},
{
"id": "3646a695-d63b-4e25-93b4-a208592e6eac",
"name": "从Unsplash获取图片3",
"type": "n8n-nodes-base.httpRequest",
"position": [
720,
0
],
"parameters": {
"url": "={{ $json.urls }}",
"options": {}
},
"typeVersion": 4.2
},
{
"id": "34ef745b-23c6-422d-9367-de79eeb54e77",
"name": "转换为base64",
"type": "n8n-nodes-base.extractFromFile",
"position": [
940,
0
],
"parameters": {
"options": {},
"operation": "binaryToPropery"
},
"typeVersion": 1
},
{
"id": "762507d2-2093-4ac8-a4d4-2972c53fa839",
"name": "调用Gemini API1",
"type": "n8n-nodes-base.httpRequest",
"position": [
1160,
0
],
"parameters": {
"url": "=https://generativelanguage.googleapis.com/v1beta/models/gemini-2.0-flash:generateContent",
"method": "POST",
"options": {},
"jsonBody": "={\n \"contents\": [{\n \"parts\":[\n {\"text\": \"Whats on this image?\"},\n {\n \"inline_data\": {\n \"mime_type\": \"image/jpeg\",\n \"data\": \"{{ $json.data }}\"\n }\n }\n ]\n }]\n}\n",
"sendBody": true,
"specifyBody": "json",
"authentication": "genericCredentialType",
"genericAuthType": "httpQueryAuth"
},
"credentials": {
"httpQueryAuth": {
"id": "Eh1GI1UjOtJk4CDZ",
"name": "Query Gemini Auth account"
}
},
"typeVersion": 4.2
},
{
"id": "0dfa7ae9-1eda-49ca-8067-c467346c27cb",
"name": "遍历项目",
"type": "n8n-nodes-base.splitInBatches",
"position": [
1560,
-280
],
"parameters": {
"options": {}
},
"typeVersion": 3
},
{
"id": "c5562d6b-0b56-4f15-bbd0-441359f89d86",
"name": "AI Agent2",
"type": "@n8n/n8n-nodes-langchain.agent",
"position": [
1560,
-700
],
"parameters": {
"text": "whats on the image",
"options": {
"passthroughBinaryImages": true
},
"promptType": "define"
},
"typeVersion": 1.7
},
{
"id": "277c44ec-109b-4dfa-bc04-defec26e6581",
"name": "Google Gemini聊天模型1",
"type": "@n8n/n8n-nodes-langchain.lmChatGoogleGemini",
"position": [
1500,
-540
],
"parameters": {
"options": {},
"modelName": "models/gemini-2.0-flash"
},
"credentials": {
"googlePalmApi": {
"id": "BB5B0v4OaFQeEt3C",
"name": "Google Gemini(PaLM) Api account"
}
},
"typeVersion": 1
},
{
"id": "c303ab4e-155f-4c36-bf07-4825d0d1fd93",
"name": "从Unsplash获取图片4",
"type": "n8n-nodes-base.httpRequest",
"position": [
1160,
-700
],
"parameters": {
"url": "=https://plus.unsplash.com/premium_photo-1740023685108-a12c27170d51?q=80&w=2340&auto=format&fit=crop&ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D",
"options": {}
},
"typeVersion": 4.2
},
{
"id": "b786ac03-75d0-4830-849f-ee9ed8e108fa",
"name": "获取PDF文件",
"type": "n8n-nodes-base.httpRequest",
"position": [
260,
360
],
"parameters": {
"url": "https://www.w3.org/WAI/ER/tests/xhtml/testfiles/resources/pdf/dummy.pdf",
"options": {}
},
"typeVersion": 4.2
},
{
"id": "bb7ba59e-050a-4259-8238-dc25f458e3c4",
"name": "从Unsplash获取图片",
"type": "n8n-nodes-base.httpRequest",
"position": [
260,
660
],
"parameters": {
"url": "=https://plus.unsplash.com/premium_photo-1740023685108-a12c27170d51?q=80&w=2340&auto=format&fit=crop&ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D",
"options": {}
},
"typeVersion": 4.2
},
{
"id": "65a4cb42-632b-4fbd-8e28-10e36e9f1e00",
"name": "使用PDF调用Gemini API",
"type": "n8n-nodes-base.httpRequest",
"position": [
720,
360
],
"parameters": {
"url": "=https://generativelanguage.googleapis.com/v1beta/models/gemini-2.0-flash:generateContent",
"method": "POST",
"options": {},
"jsonBody": "={\n \"contents\": [{\n \"parts\":[\n {\"text\": \"Whats on this pdf?\"},\n {\n \"inline_data\": {\n \"mime_type\": \"application/pdf\",\n \"data\": \"{{ $json.data }}\"\n }\n }\n ]\n }]\n}\n",
"sendBody": true,
"specifyBody": "json",
"authentication": "genericCredentialType",
"genericAuthType": "httpQueryAuth"
},
"credentials": {
"httpQueryAuth": {
"id": "Eh1GI1UjOtJk4CDZ",
"name": "Query Gemini Auth account"
}
},
"typeVersion": 4.2
},
{
"id": "75a13a82-c051-449a-bf52-837256c18f22",
"name": "使用图片调用Gemini API",
"type": "n8n-nodes-base.httpRequest",
"position": [
720,
660
],
"parameters": {
"url": "=https://generativelanguage.googleapis.com/v1beta/models/gemini-2.0-flash:generateContent",
"method": "POST",
"options": {},
"jsonBody": "={\n \"contents\": [{\n \"parts\":[\n {\"text\": \"Whats on this image?\"},\n {\n \"inline_data\": {\n \"mime_type\": \"image/jpeg\",\n \"data\": \"{{ $json.data }}\"\n }\n }\n ]\n }]\n}\n",
"sendBody": true,
"specifyBody": "json",
"authentication": "genericCredentialType",
"genericAuthType": "httpQueryAuth"
},
"credentials": {
"httpQueryAuth": {
"id": "Eh1GI1UjOtJk4CDZ",
"name": "Query Gemini Auth account"
}
},
"typeVersion": 4.2
},
{
"id": "55964e8d-ce0a-4157-b536-41862da946ab",
"name": "转换为base64（图片）",
"type": "n8n-nodes-base.extractFromFile",
"position": [
500,
660
],
"parameters": {
"options": {},
"operation": "binaryToPropery"
},
"typeVersion": 1
},
{
"id": "57fc92ee-2a74-4d49-ae7a-6c499a1f380e",
"name": "转换为base64（pdf）",
"type": "n8n-nodes-base.extractFromFile",
"position": [
500,
360
],
"parameters": {
"options": {},
"operation": "binaryToPropery"
},
"typeVersion": 1
},
{
"id": "dc0a5515-1a51-4a11-9b39-ac8b30bcb0ba",
"name": "定义多个图片URL",
"type": "n8n-nodes-base.set",
"position": [
260,
0
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "95f15b6e-f66a-450a-be19-75d4c339f943",
"name": "urls",
"type": "array",
"value": "=[\n \"https://plus.unsplash.com/premium_photo-1740023685108-a12c27170d51?q=80&w=2340&auto=format&fit=crop&ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D\",\n \"https://images.unsplash.com/photo-1739609579483-00b49437cc45?q=80&w=2342&auto=format&fit=crop&ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D\"\n]\n"
}
]
}
},
"typeVersion": 3.4
},
{
"id": "4f9037a3-adc5-4ada-b977-6ecdf6f58705",
"name": "拆分为多个项目",
"type": "n8n-nodes-base.splitOut",
"position": [
500,
0
],
"parameters": {
"options": {},
"fieldToSplitOut": "urls"
},
"typeVersion": 1
},
{
"id": "0e0bbf58-4c83-4769-9616-c120296ce5e0",
"name": "便签",
"type": "n8n-nodes-base.stickyNote",
"position": [
-760,
-780
],
"parameters": {
"color": 5,
"width": 440,
"height": 340,
"content": "## 点击\"测试工作流\"时"
},
"typeVersion": 1
},
{
"id": "2a6236b2-c5a3-4feb-883a-b3654ce78278",
"name": "定义URL和提示词",
"type": "n8n-nodes-base.set",
"position": [
260,
-280
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "95f15b6e-f66a-450a-be19-75d4c339f943",
"name": "urls",
"type": "array",
"value": "={{ \n[\n {\n url: \"https://plus.unsplash.com/premium_photo-1740023685108-a12c27170d51?q=80&w=2340&auto=format&fit=crop&ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D\",\n prompt: \"what is special about this image?\",\n process: true\n },\n {\n url: \"https://images.unsplash.com/photo-1739609579483-00b49437cc45?q=80&w=2342&auto=format&fit=crop&ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D\",\n prompt: \"what is the main color?\",\n process: true\n },\n {\n url: \"https://plus.unsplash.com/premium_photo-1740023685108-a12c27170d51?q=80&w=2340&auto=format&fit=crop&ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D\",\n prompt: \"test\", \n process: false\n }\n]\n}}"
}
]
}
},
"typeVersion": 3.4
},
{
"id": "91dd2eec-3179-4c14-857e-bb65499723be",
"name": "便签1",
"type": "n8n-nodes-base.stickyNote",
"position": [
1920,
-700
],
"parameters": {
"color": 4,
"width": 440,
"height": 300,
"content": "## 方法1：单张图片，自动二进制直通"
},
"typeVersion": 1
},
{
"id": "2b48f2d0-8c55-40da-acf5-0d9267691817",
"name": "过滤（可选）",
"type": "n8n-nodes-base.filter",
"position": [
720,
-280
],
"parameters": {
"options": {},
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "51b55272-94af-4761-a42e-5c91f3b8e39e",
"operator": {
"type": "boolean",
"operation": "true",
"singleValue": true
},
"leftValue": "={{ $json.process }}",
"rightValue": ""
}
]
}
},
"typeVersion": 2.2
},
{
"id": "f9f98d03-99c6-4424-b7cc-fd2ef836173b",
"name": "便签2",
"type": "n8n-nodes-base.stickyNote",
"position": [
2220,
-260
],
"parameters": {
"color": 3,
"width": 460,
"height": 360,
"content": "## 方法2：多张图片，自定义提示词"
},
"typeVersion": 1
},
{
"id": "057ecbfa-3079-451f-9376-eefcdf4ab96a",
"name": "便签3",
"type": "n8n-nodes-base.stickyNote",
"position": [
1360,
0
],
"parameters": {
"color": 7,
"width": 360,
"height": 380,
"content": "## 方法3：标准n8n项目处理，直接API"
},
"typeVersion": 1
},
{
"id": "3dfbde27-7141-4558-a958-00b2891274ec",
"name": "便签4",
"type": "n8n-nodes-base.stickyNote",
"position": [
920,
360
],
"parameters": {
"width": 340,
"height": 280,
"content": "## 方法4：通过直接API分析PDF"
},
"typeVersion": 1
},
{
"id": "f50dae19-77e4-4450-a516-7f0e676d161a",
"name": "便签5",
"type": "n8n-nodes-base.stickyNote",
"position": [
920,
660
],
"parameters": {
"width": 340,
"height": 300,
"content": "## 方法5：通过直接API分析图片"
},
"typeVersion": 1
}
],
"pinData": {},
"connections": {
"AI Agent": {
"main": [
[
{
"node": "Loop Over Items",
"type": "main",
"index": 0
}
]
]
},
"Split Out": {
"main": [
[
{
"node": "Filter (optional)",
"type": "main",
"index": 0
}
]
]
},
"Get PDF file": {
"main": [
[
{
"node": "Transform to base64 (pdf)",
"type": "main",
"index": 0
}
]
]
},
"Loop Over Items": {
"main": [
[],
[
{
"node": "AI Agent",
"type": "main",
"index": 0
}
]
]
},
"Call Gemini API1": {
"main": [
[]
]
},
"Filter (optional)": {
"main": [
[
{
"node": "Get image from unsplash2",
"type": "main",
"index": 0
}
]
]
},
"Transform to base": {
"main": [
[
{
"node": "Call Gemini API1",
"type": "main",
"index": 0
}
]
]
},
"Define URLs And Prompts": {
"main": [
[
{
"node": "Split Out",
"type": "main",
"index": 0
}
]
]
},
"Get image from unsplash": {
"main": [
[
{
"node": "Transform to base64 (image)",
"type": "main",
"index": 0
}
]
]
},
"Get image from unsplash2": {
"main": [
[
{
"node": "Loop Over Items",
"type": "main",
"index": 0
}
]
]
},
"Get image from unsplash3": {
"main": [
[
{
"node": "Transform to base",
"type": "main",
"index": 0
}
]
]
},
"Get image from unsplash4": {
"main": [
[
{
"node": "AI Agent2",
"type": "main",
"index": 0
}
]
]
},
"Google Gemini Chat Model": {
"ai_languageModel": [
[
{
"node": "AI Agent",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Google Gemini Chat Model1": {
"ai_languageModel": [
[
{
"node": "AI Agent2",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Transform to base64 (pdf)": {
"main": [
[
{
"node": "Call Gemini API with PDF",
"type": "main",
"index": 0
}
]
]
},
"Define Multiple Image URLs": {
"main": [
[
{
"node": "Split Out to multiple items",
"type": "main",
"index": 0
}
]
]
},
"Split Out to multiple items": {
"main": [
[
{
"node": "Get image from unsplash3",
"type": "main",
"index": 0
}
]
]
},
"Transform to base64 (image)": {
"main": [
[
{
"node": "Call Gemini API with Image",
"type": "main",
"index": 0
}
]
]
},
"When clicking ‘Test workflow’": {
"main": [
[
{
"node": "Define URLs And Prompts",
"type": "main",
"index": 0
},
{
"node": "Define Multiple Image URLs",
"type": "main",
"index": 0
},
{
"node": "Get PDF file",
"type": "main",
"index": 0
},
{
"node": "Get image from unsplash",
"type": "main",
"index": 0
},
{
"node": "Get image from unsplash4",
"type": "main",
"index": 0
}
]
]
}
}
}常见问题
如何使用这个工作流？
复制上方的 JSON 配置代码，在您的 n8n 实例中创建新工作流并选择「从 JSON 导入」，粘贴配置后根据需要修改凭证设置即可。
这个工作流适合什么场景？
高级 - 构建模块, 人工智能
需要付费吗？
本工作流完全免费，您可以直接导入使用。但请注意，工作流中使用的第三方服务（如 OpenAI API）可能需要您自行付费。
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Julian Kaiser
@jksrFull Stack Developer turned AI & Automation Engineer, implementing intelligent solutions with custom code, LLMs & n8n. Use my link to book a consultation on automating your business processes.
外部链接
在 n8n.io 查看 →
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