Image to license plate number

Extract license plate numbers from images with this efficient n8n workflow, designed for rapid data processing. This workflow utilizes a manual trigger to initiate the process, feeding an image URL or base64 encoded image into a Basic LLM Chain. The Basic LLM Chain, powered by an OpenRouter LLM, then analyzes the image to identify and extract the license plate number, demonstrating the power of AI for image-to-text conversion. The extracted license plate number is then presented on a FormResultPage, providing a clear and immediate output. Businesses like parking management companies, vehicle rental agencies, or law enforcement can leverage this to automate the identification of vehicles from image captures, significantly reducing manual data entry and potential errors. This automation saves considerable time and effort in processing vehicle information, allowing staff to focus on more critical tasks rather than tedious manual transcription.

5 nodesmanual trigger235 views0 copiesData

Workflow JSON

{"id": "B37wvB0tdKgjuabw", "meta": {"instanceId": "98bf0d6aef1dd8b7a752798121440fb171bf7686b95727fd617f43452393daa3", "templateCredsSetupCompleted": true}, "name": "Image to license plate number", "tags": [], "nodes": [{"id": "a656334a-0135-4d93-a6df-ca97222c9753", "name": "Basic LLM Chain", "type": "@n8n/n8n-nodes-langchain.chainLlm", "position": [-140, -380], "parameters": {"text": "={{ $json.prompt }}", "messages": {"messageValues": [{"type": "HumanMessagePromptTemplate", "messageType": "imageBinary", "binaryImageDataKey": "Image"}]}, "promptType": "define"}, "typeVersion": 1.5}, {"id": "41a90592-2a91-40ff-abf4-3a795733d521", "name": "FormResultPage", "type": "n8n-nodes-base.form", "position": [220, -380], "webhookId": "218822fe-5eb9-4451-ae8a-14b8f484fdde", "parameters": {"options": {"formTitle": ""}, "operation": "completion", "completionTitle": "Extracted information:", "completionMessage": "={{ $json.text }}"}, "typeVersion": 1}, {"id": "c23b95d9-b7a2-4e9e-a019-5724a9662abd", "name": "OpenRouter LLM", "type": "@n8n/n8n-nodes-langchain.lmChatOpenRouter", "position": [-60, -180], "parameters": {"model": "={{ $json.model }}", "options": {}}, "credentials": {"openRouterApi": {"id": "", "name": "[Your openRouterApi]"}}, "typeVersion": 1}, {"id": "8298cd51-8c47-4bc4-af78-2c216207ef76", "name": "Settings", "type": "n8n-nodes-base.set", "position": [-340, -380], "parameters": {"options": {}, "assignments": {"assignments": [{"id": "1b8381dc-5b9a-42a2-8a67-cc706b433180", "name": "model", "type": "string", "value": "openai/gpt-4o"}, {"id": "72aec130-ab56-4e61-b60b-9a31dd8d02e6", "name": "prompt", "type": "string", "value": "Extract the number of the license plate on the front-most car depicted in the attached image and return only the extracted characters without any other text or structure."}]}, "includeOtherFields": true}, "typeVersion": 3.4}, {"id": "fae79fc9-b510-44a4-beec-4dc26dc2a13a", "name": "FromTrigger", "type": "n8n-nodes-base.formTrigger", "position": [-560, -380], "webhookId": "41e3f34b-7abe-4c64-95cd-2942503d5e98", "parameters": {"options": {}, "formTitle": "Analyse image", "formFields": {"values": [{"fieldType": "file", "fieldLabel": "Image", "requiredField": true, "acceptFileTypes": ".jpg, .png"}]}, "responseMode": "lastNode", "formDescription": "To analyse an image, upload it here."}, "typeVersion": 2.2}], "active": true, "pinData": {}, "settings": {"executionOrder": "v1"}, "versionId": "5b9c53b9-3998-4676-999d-1ba117bf6695", "connections": {"Settings": {"main": [[{"node": "Basic LLM Chain", "type": "main", "index": 0}]]}, "FromTrigger": {"main": [[{"node": "Settings", "type": "main", "index": 0}]]}, "OpenRouter LLM": {"ai_languageModel": [[{"node": "Basic LLM Chain", "type": "ai_languageModel", "index": 0}]]}, "Basic LLM Chain": {"main": [[{"node": "FormResultPage", "type": "main", "index": 0}]]}}}

How to Import This Workflow

1Copy the workflow JSON above using the Copy Workflow JSON button.
2Open your n8n instance and go to Workflows.
3Click Import from JSON and paste the copied workflow.

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