AI Image Caption Overlay
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Generate a caption for an image using AI and overlay it onto the image.
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About This Workflow
Overview
This workflow demonstrates how to use a multimodal AI model (like Google Gemini) to generate a caption for an image and then uses the Edit Image node to overlay this caption onto the original image. This is useful for adding descriptive text, watermarks, or copyright information to images within your automation.
Key Features
- AI Caption Generation: Utilizes a vision-capable LLM to understand image content and generate a descriptive caption.
- Dynamic Text Placement: Calculates optimal positioning and sizing for the caption text on the image.
- Image Editing: Overlays generated captions, including background rectangles for readability, onto the image.
- Flexible Input: Can be adapted to use different images or trigger based on various sources.
Key Features
- AI-powered image captioning using multimodal models.
- Dynamic calculation of text size, line length, and positioning.
- Overlaying text with background on images.
- Supports different image input sources (e.g., HTTP request).
- Extensible for use cases like watermarking or copyright.
How To Use
- Import Image: Use the
HTTP Requestnode to fetch an image from a URL or replace it with another trigger (e.g., webhook, file upload). - Generate Caption: Connect the image to the
Google Gemini Chat Modelnode. Configure themodelNameand ensure your image data is passed as auserMessage. - Parse Output: Use the
Structured Output Parserto extract thecaption_titleandcaption_textfrom the AI's response. - Get Image Information: Use the
Get Infonode to retrieve the dimensions of the input image. - Calculate Positioning: The
Calculate Positioningcode node computes the necessary font size, line breaks, and coordinates for placing the caption. - Merge Data: Use the
Merge Image & Captionnode to combine the image information and the parsed caption data. - Merge Caption & Positions: Use the
Merge Caption & Positionsnode to combine the image data with the calculated caption placement details. - Apply Caption: The
Apply Caption to Imagenode uses theEdit Imageoperation to draw a semi-transparent background and then overlay the generated caption text onto the image.
Apps Used
Workflow JSON
{
"id": "0428a173-95d7-4346-b37e-e11ba132e097",
"name": "AI Image Caption Overlay",
"nodes": 0,
"category": "AI & Image Processing",
"status": "active",
"version": "1.0.0"
}Note: This is a sample preview. The full workflow JSON contains node configurations, credentials placeholders, and execution logic.
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ID: 0428a173-95d7...
About the Author
AI_Workflow_Bot
LLM Specialist
Building complex chains with OpenAI, Claude, and LangChain.
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