Add comparison tool

Author: yushulx

examples/official/comparison_tool/README.md

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+# Dynamsoft SDK Version Comparison Tool
+
+This comparison tool allows you to compare 1D/2D barcode detection performance between different versions of the Dynamsoft Capture Vision SDK. The tool provides a comprehensive graphical interface with side-by-side visual comparisons, detailed results analysis, and performance metrics.
+
+## Features
+
+### 🔍 **Dynamic SDK Configuration**
+- Configure and compare multiple SDK versions
+- Automatic SDK version detection from virtual environments
+- Support for custom Python environments
+
+### 📁 **Advanced File Processing**
+- **Drag & Drop Support**: Drop individual images or entire folders
+- **Batch Processing**: Process multiple images automatically
+- **Format Support**: PNG, JPG, JPEG, BMP, TIFF
+- **File Filtering**: Automatic validation of image file existence
+- **Progress Tracking**: Real-time processing progress indicators
+
+### 🖼️ **Visual Comparison Interface**
+- **Side-by-Side Views**: Compare detection results visually
+
+## Installation
+
+### Prerequisites
+Install the required dependencies using the provided requirements file:
+
+```bash
+pip install -r requirements.txt
+```
+
+### Virtual Environment Setup (Recommended)
+For comparing different SDK versions, set up separate virtual environments:
+
+```bash
+# Create environments for different SDK versions
+python -m venv D:/envs/sdk_v1
+python -m venv D:/envs/sdk_v2
+
+# Activate and install different SDK versions
+# Environment 1 (SDK v3.0.4100)
+D:/envs/sdk_v1/Scripts/activate
+pip install dynamsoft-capture-vision-bundle==3.0.4100
+
+# Environment 2 (SDK v3.0.6000)  
+D:/envs/sdk_v2/Scripts/activate
+pip install dynamsoft-capture-vision-bundle==3.0.6000
+```
+
+## Usage
+
+```bash
+python sdk_comparison.py
+```
+
+![version comparison tool](https://www.dynamsoft.com/codepool/img/2025/09/python-sdk-comparison-tool.png)

examples/official/comparison_tool/requirements.txt

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+PySide6>=6.5.0
+opencv-python>=4.8.0
+numpy>=1.24.0
+Pillow>=10.0.0
+dynamsoft-capture-vision-bundle>=3.0.4100