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The document extraction function can recognize stamp information in documents, including stamp type, color, position, and other detailed information. Stamp information is significant for document authenticity verification and compliance checking.

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Stamp Structure

Stamp information is located in result.files[].data.stamps[], with each stamp containing the following attributes:
  • page: Page number where the stamp is located (starting from 0)
  • text: Text content in the stamp
  • type: Stamp type (such as “Invoice Special Seal”, “Financial Special Seal”, etc.)
  • color: Stamp color (such as “Red”, “Blue”, etc.)
  • shape: Stamp shape (such as “Round Seal”, “Square Seal”, etc.)

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Stamp Data Structure

{
  "page": 0,                    // Page number
  "text": "National Unified Invoice Supervision Seal",  // Stamp text
  "type": "Other",               // Stamp type
  "color": "Red"               // Stamp color
}

​
Example Code

import requests
import json

def extract_stamps(workspace_id, batch_number, app_id, secret_code):
    """Extract stamp information from documents"""
    
    host = "https://docflow.textin.ai"
    url = "/api/app-api/sip/platform/v2/file/fetch"
    
    resp = requests.get(
        f"{host}{url}",
        params={
            "workspace_id": workspace_id, 
            "batch_number": batch_number
        },
        headers={
            "x-ti-app-id": app_id, 
            "x-ti-secret-code": secret_code
        },
        timeout=60,
    )
    
    if resp.status_code != 200:
        print(f"Request failed: {resp.status_code}")
        return None
    
    data = resp.json()
    
    for file in data.get("result", {}).get("files", []):
        print(f"File name: {file.get('name')}")
        
        # Extract stamp information
        stamps = file.get("data", {}).get("stamps", [])
        
        if stamps:
            print(f"\n=== Stamp Information ===")
            print(f"Number of stamps: {len(stamps)}")
            
            for i, stamp in enumerate(stamps):
                page = stamp.get("page", 0)
                text = stamp.get("text", "")
                stamp_type = stamp.get("type", "")
                color = stamp.get("color", "")
                
                print(f"\nStamp {i+1}:")
                print(f"  Page: Page {page+1}")
                print(f"  Text: {text}")
                print(f"  Type: {stamp_type}")
                print(f"  Color: {color}")
        else:
            print("No stamp information found")
    
    return data

# Usage example
if __name__ == "__main__":
    workspace_id = "<your-workspace-id>"
    batch_number = "<your-batch-number>"
    app_id = "<your-app-id>"
    secret_code = "<your-secret-code>"
    
    result = extract_stamps(workspace_id, batch_number, app_id, secret_code)

​
Return Data Example

{
  "code": 200,
  "result": {
    "files": [
      {
        "id": "202412190001",
        "name": "invoice.pdf",
        "recognition_status": 1,
        "data": {
          "stamps": [
            {
              "page": 0,
              "text": "National Unified Invoice Supervision Seal",
              "type": "Other",
              "color": "Red"
            },
            {
              "page": 0,
              "text": "Shanghai XX Technology Co., Ltd. Invoice Special Seal",
              "type": "Invoice Special Seal",
              "color": "Red"
            },
            {
              "page": 0,
              "text": "December 19, 2024",
              "type": "Date Seal",
              "color": "Blue"
            }
          ]
        }
      }
    ]
  }
}