AI-Powered Image Captioning & Dynamic Overlay with Google Gemini
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This workflow leverages Google Gemini's multimodal AI capabilities to automatically generate compelling captions for your images. It then intelligently overlays these captions onto the images, creating ready-to-publish visual content for various platforms, complete with dynamic sizing and positioning.
About This Workflow
Unlock the power of AI for your visual content strategy! This n8n workflow demonstrates a sophisticated automation for generating and applying dynamic captions to any image using Google's cutting-edge Gemini 1.5-Flash model. Starting with an image input, the workflow resizes it for optimal AI processing, then sends it to Gemini to intelligently generate a fitting title and descriptive text. A custom code node ensures the caption is perfectly positioned and sized on the image, adapting to different image dimensions. Finally, the image is transformed with a professional, overlaid caption, making it instantly ready for social media, blogs, or e-commerce listings.
Key Features
- Advanced AI Caption Generation: Utilizes Google Gemini 1.5-Flash for intelligent and context-aware image captioning, generating both titles and descriptive text.
- Dynamic Image Caption Overlay: Automatically calculates optimal font size, line breaks, and positioning for captions, ensuring legibility and aesthetic appeal on any image size.
- Multimodal AI Integration: Seamlessly integrates image binary data directly into the AI prompt for powerful visual analysis.
- Automated Image Pre-processing: Includes steps for resizing images to optimize AI model input and extract crucial image metadata.
- Structured AI Output: Employs a structured output parser to ensure consistent and reliable extraction of generated captions.
How To Use
- Trigger the Workflow: Use the 'When clicking 'Test workflow'' node for manual execution, or replace it with a 'Webhook' or 'Watch Files' node for automated input.
- Input Your Image: Modify the 'Get Image' node to fetch images from your desired source (e.g., cloud storage, local directory, a URL).
- Configure Google Gemini: Ensure your Google Gemini (PaLM) API credentials are set up. If needed, adjust the
modelNameparameter in the 'Google Gemini Chat Model' node. - Customize Caption Output: Modify the
jsonSchemaExamplein the 'Structured Output Parser' if you need the AI to generate different or additional structured caption elements. - Refine Caption Styling: Adjust the
font,fontColor, andcolorparameters within the 'Apply Caption to Image' node for your desired visual style. - Review and Adapt Positioning Logic: For advanced customization, explore the JavaScript code in the 'Calculate Positioning' node to fine-tune how captions are dynamically placed and sized.
Apps Used
Workflow JSON
{
"id": "d8a130a2-ba7f-4297-bf9b-ab1e95afc517",
"name": "AI-Powered Image Captioning & Dynamic Overlay with Google Gemini",
"nodes": 14,
"category": "Marketing",
"status": "active",
"version": "1.0.0"
}Note: This is a sample preview. The full workflow JSON contains node configurations, credentials placeholders, and execution logic.
Get This Workflow
ID: d8a130a2-ba7f...
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