azure documentloader with advance configs

Author: enoch3712

docs/core-concepts/document-loaders/azure-form.md

@@ -15,9 +15,9 @@ from extract_thinker import DocumentLoaderAzureForm
 
 # Initialize with Azure credentials
 loader = DocumentLoaderAzureForm(
+    subscription_key="your_subscription_key",
     endpoint="your_endpoint",
-    key="your_api_key",
-    model="prebuilt-document"  # Use prebuilt document model
+    model_id="prebuilt-document"  # Use prebuilt document model
 )
 
 # Load document
@@ -29,6 +29,8 @@ for page in pages:
     text = page["content"]
     # Access tables if available
     tables = page.get("tables", [])
+    # Access form fields if available
+    forms = page.get("forms", {})
 ```
 
 ### Configuration-based Usage
@@ -38,12 +40,11 @@ from extract_thinker import DocumentLoaderAzureForm, AzureConfig
 
 # Create configuration
 config = AzureConfig(
+    subscription_key="your_subscription_key",
     endpoint="your_endpoint",
-    key="your_api_key",
-    model="prebuilt-read",     # Use layout model for enhanced layout analysis
-    language="en",               # Specify document language
-    pages=[1, 2, 3],            # Process specific pages
-    cache_ttl=600               # Cache results for 10 minutes
+    model_id="prebuilt-layout",     # Use layout model for enhanced layout analysis
+    cache_ttl=600,                  # Cache results for 10 minutes
+    features=["ocrHighResolution", "barcodes"]  # Enable advanced features
 )
 
 # Initialize loader with configuration
@@ -53,36 +54,144 @@ loader = DocumentLoaderAzureForm(config)
 pages = loader.load("path/to/your/document.pdf")
 ```
 
+### Advanced Features Usage
+
+```python
+from extract_thinker import DocumentLoaderAzureForm, AzureConfig
+
+# Configuration with multiple advanced features
+config = AzureConfig(
+    subscription_key="your_subscription_key",
+    endpoint="your_endpoint",
+    model_id="prebuilt-layout",
+    features=[
+        "ocrHighResolution",    # High resolution OCR for small text
+        "formulas",             # Extract mathematical formulas in LaTeX
+        "styleFont",            # Extract font properties
+        "barcodes",             # Extract barcodes and QR codes
+        "languages",            # Detect document languages
+        "keyValuePairs"         # Extract key-value pairs from forms
+    ]
+)
+
+loader = DocumentLoaderAzureForm(config)
+pages = loader.load("document_with_advanced_content.pdf")
+
+for page in pages:
+    # Standard content
+    print(f"Text content: {page['content']}")
+    print(f"Tables: {page['tables']}")
+    print(f"Forms: {page['forms']}")
+    
+    # Advanced features (if detected in document)
+    if 'formulas' in page:
+        print(f"Mathematical formulas: {page['formulas']}")
+    
+    if 'fonts' in page:
+        print(f"Font information: {page['fonts']}")
+    
+    if 'barcodes' in page:
+        print(f"Barcodes found: {page['barcodes']}")
+    
+    if 'languages' in page:
+        print(f"Detected languages: {page['languages']}")
+```
+
+### Specialized Models Usage
+
+```python
+# Use specialized invoice model
+config = AzureConfig(
+    subscription_key="your_subscription_key",
+    endpoint="your_endpoint",
+    model_id="prebuilt-invoice"
+)
+
+loader = DocumentLoaderAzureForm(config)
+pages = loader.load("invoice.pdf")
+
+# Access extracted invoice fields
+for page in pages:
+    forms = page["forms"]
+    vendor_name = forms.get("VendorName", "")
+    invoice_total = forms.get("InvoiceTotal", "")
+    print(f"Vendor: {vendor_name}, Total: {invoice_total}")
+```
+
 ## Configuration Options
 
 The `AzureConfig` class supports the following options:
 
 | Option | Type | Default | Description |
 |--------|------|---------|-------------|
+| `subscription_key` | str | Required | Azure subscription key |
+| `endpoint` | str | Required | Azure endpoint URL |
 | `content` | Any | None | Initial content to process |
 | `cache_ttl` | int | 300 | Cache time-to-live in seconds |
-| `endpoint` | str | None | Azure endpoint URL |
-| `key` | str | None | Azure API key |
-| `model` | str | "prebuilt-document" | Model ID to use |
-| `language` | str | None | Document language code |
-| `pages` | List[int] | None | Specific pages to process |
-| `reading_order` | str | "natural" | Text reading order |
+| `model_id` | str | "prebuilt-layout" | Model ID to use |
+| `max_retries` | int | 3 | Maximum retries for failed requests |
+| `features` | List[str] | None | Advanced features to enable |
+
+## Available Models
+
+### General Purpose Models
+
+| Model ID | Description | Best For |
+|----------|-------------|----------|
+| `prebuilt-read` | OCR/Read model | Text extraction from printed and handwritten documents |
+| `prebuilt-layout` | Layout analysis | Documents with tables, selection marks, and complex layouts |
+| `prebuilt-document` | General document | Key-value pairs, tables, and general document structure |
+
+### Specialized Models
+
+| Model ID | Description |
+|----------|-------------|
+| `prebuilt-invoice` | Invoice processing |
+| `prebuilt-receipt` | Receipt processing |
+| `prebuilt-idDocument` | Identity documents |
+| `prebuilt-businessCard` | Business cards |
+| `prebuilt-tax.us.w2` | US W2 tax forms |
+| `prebuilt-tax.us.1040` | US 1040 tax forms |
+| `prebuilt-contract` | Contracts |
+| `prebuilt-healthInsurance` | US health insurance cards |
+| `prebuilt-bankStatement` | Bank statements |
+| `prebuilt-payStub` | Pay stubs |
+
+## Advanced Features
+
+The loader supports advanced extraction features that can be enabled via the `features` parameter:
+
+| Feature | Description | Output Field |
+|---------|-------------|--------------|
+| `ocrHighResolution` | High resolution OCR for better small text recognition | Enhanced text in `content` |
+| `formulas` | Extract mathematical formulas in LaTeX format | `formulas` array |
+| `styleFont` | Extract font properties (family, style, weight, color) | `fonts` array |
+| `barcodes` | Extract barcodes and QR codes | `barcodes` array |
+| `languages` | Detect document languages | `languages` array |
+| `keyValuePairs` | Extract key-value pairs from forms | Enhanced `forms` dict |
+| `queryFields` | Enable custom field extraction | Enhanced extraction |
+| `searchablePDF` | Convert scanned PDFs to searchable format | Enhanced OCR |
 
 ## Features
 
 - Text extraction with layout preservation
 - Table detection and extraction
-- Form field recognition
-- Multiple model support (document, layout, read)
-- Language specification
-- Page selection
-- Reading order control
-- Caching support
-- Support for pre-configured clients
+- Form field recognition with specialized models
+- Advanced OCR with high resolution support
+- Mathematical formula extraction (LaTeX format)
+- Font property extraction
+- Barcode and QR code detection
+- Multi-language document support
+- Caching support with configurable TTL
+- Vision mode support for image formats
+- Retry logic for robust processing
 
 ## Notes
 
-- Available models: "prebuilt-document", "prebuilt-layout", "prebuilt-read"
-- Vision mode is supported for image formats
-- Azure credentials are required
+- Azure subscription key and endpoint are required
+- Advanced features may increase processing time and costs
+- Specialized models are optimized for specific document types
 - Rate limits and quotas apply based on your Azure subscription
+- Vision mode is supported for image formats
+- High resolution OCR is recommended for documents with small text
+- Formula extraction works best with clear mathematical notation