barcode-qr-code-sdk 11.2.1000

Barcode and QR code scanning SDK for Python

Python 1D/2D Barcode SDK

A Python wrapper for the Dynamsoft Barcode Reader SDK, providing simple and user-friendly APIs across Windows, Linux, and macOS. Compatible with desktop PCs, embedded devices, Raspberry Pi, and Jetson Nano.

Note: This is an unofficial, community-maintained wrapper. For official support and full feature coverage, consider the Dynamsoft Capture Vision Bundle on PyPI.

🚀 Quick Links

• 📖 Official Documentation
• 🔑 Get 30-day FREE trial license
• 📦 Official Python Package

📊 Comparison: Community vs Official

Feature	Community Wrapper	Official Dynamsoft SDK
Support	Community-driven	✅ Official Dynamsoft support
Documentation	Basic README and limited examples	✅ Comprehensive online documentation
API Coverage	Core features only	✅ Full API coverage
Updates	May lag behind	✅ Always includes the latest features
Testing	Tested in limited environments	✅ Thoroughly tested
API Usage	✅ Simple and intuitive	More complex and verbose

🔧 Installation

Requirements

• Python 3.x

• OpenCV (for UI display)

  pip install opencv-python
  

• Dynamsoft Capture Vision Bundle SDK

  pip install dynamsoft-capture-vision-bundle
  

Build from Source

# Source distribution
python setup.py sdist

# Build wheel
python setup.py bdist_wheel

🎯 Quick Start

🔑 Initialize License

import barcodeQrSDK

# Initialize with trial license
error_code, error_msg = barcodeQrSDK.initLicense("LICENSE-KEY")

if error_code != 0:
    print(f"License error: {error_msg}")
    exit()

📷 Basic Image Processing

# Create reader instance
reader = barcodeQrSDK.createInstance()

# Decode from file
results = reader.decodeFile("barcode_image.jpg")

# Process results
for barcode in results:
    print(f"Format: {barcode.format}")
    print(f"Text: {barcode.text}")
    print(f"Location: ({barcode.x1}, {barcode.y1}), ({barcode.x2}, {barcode.y2}), ({barcode.x3}, {barcode.y3}), ({barcode.x4}, {barcode.y4})")

🎥 Real-time Camera Processing

import cv2
import numpy as np

detected_barcodes = []

def on_barcode_detected(barcodes):
    """Callback function for async detection"""
    global detected_barcodes
    detected_barcodes = barcodes
    for barcode in barcodes:
        print(f"Detected: {barcode.text} ({barcode.format})")

def main():
    # Initialize
    barcodeQrSDK.initLicense("YOUR_LICENSE_KEY")
    reader = barcodeQrSDK.createInstance()
    
    # Start async detection
    reader.addAsyncListener(on_barcode_detected)
    
    # Camera capture loop
    cap = cv2.VideoCapture(0)
    
    while True:
        ret, frame = cap.read()
        if not ret:
            break
            
        # Send frame for async processing
        reader.decodeMatAsync(frame)
        
        # Draw detection results
        for barcode in detected_barcodes:
            # Draw bounding box
            points = np.array([
                [barcode.x1, barcode.y1], [barcode.x2, barcode.y2],
                [barcode.x3, barcode.y3], [barcode.x4, barcode.y4]
            ], dtype=np.int32)
            
            cv2.drawContours(frame, [points], -1, (0, 255, 0), 2)
            cv2.putText(frame, barcode.text, (barcode.x1, barcode.y1), 
                       cv2.FONT_HERSHEY_SIMPLEX, 0.8, (0, 255, 0), 2)
        
        cv2.imshow('Barcode Scanner', frame)
        
        if cv2.waitKey(1) & 0xFF == ord('q'):
            break
    
    # Cleanup
    reader.clearAsyncListener()
    cap.release()
    cv2.destroyAllWindows()

if __name__ == '__main__':
    main()

📱 Command Line Usage

# Basic scanning
scanbarcode image.jpg -l YOUR_LICENSE_KEY

# With visual display
scanbarcode image.jpg -u 1 -l YOUR_LICENSE_KEY

📚 API Reference

🏗️ Core Functions

initLicense(licenseKey: str) -> tuple

Initialize the SDK with your license key.

error_code, error_msg = barcodeQrSDK.initLicense("YOUR_LICENSE_KEY")

Returns: (error_code: int, error_message: str)

createInstance() -> BarcodeReader

Create a new barcode reader instance.

reader = barcodeQrSDK.createInstance()

🔍 BarcodeReader Class

Synchronous Detection

decodeFile(file_path: str) -> list

Decode barcodes from an image file.

results = reader.decodeFile("path/to/image.jpg")

Supported formats: JPEG, PNG, BMP, TIFF, GIF

decodeMat(mat) -> list

Decode barcodes from an OpenCV image matrix.

import cv2
image = cv2.imread("image.jpg")
results = reader.decodeMat(image)

decodeBytes(bytes, width, height, stride, pixel_format) -> list

Decode barcodes from raw image bytes.

from dynamsoft_capture_vision_bundle import EnumImagePixelFormat

results = reader.decodeBytes(
    image_bytes, 640, 480, 1920, 
    EnumImagePixelFormat.IPF_RGB_888
)

Asynchronous Detection

addAsyncListener(callback) -> None

Start real-time barcode detection with callback.

def on_detection(barcodes):
    for barcode in barcodes:
        print(f"Found: {barcode.text}")

reader.addAsyncListener(on_detection)

decodeMatAsync(mat) -> None

Process OpenCV image asynchronously.

reader.decodeMatAsync(camera_frame)

decodeBytesAsync(bytes, width, height, stride, pixel_format) -> None

Process raw bytes asynchronously.

reader.decodeBytesAsync(raw_bytes, width, height, stride, pixel_format)

clearAsyncListener() -> None

Stop async detection and cleanup.

reader.clearAsyncListener()

Configuration

getParameters() -> str

Get current detection parameters as JSON.

params_json = reader.getParameters()

setParameters(params: str) -> tuple

Set detection parameters from JSON.

error_code, error_msg = reader.setParameters(modified_params)

📦 BarcodeResult Class

Each detected barcode returns a BarcodeResult object with:

class BarcodeResult:
    text: str           # Decoded text content
    format: str         # Barcode format (e.g., "QR_CODE", "CODE_128")
    
    # Corner coordinates 
    x1, y1: float      
    x2, y2: float      
    x3, y3: float      
    x4, y4: float      

🛠️ Utility Functions

convertMat2ImageData(mat) -> ImageData

Convert OpenCV matrix to SDK format.

image_data = barcodeQrSDK.convertMat2ImageData(cv_image)

Supported Barcode Symbologies

• Linear Barcodes (1D)

  • Code 39 (including Code 39 Extended)
  • Code 93
  • Code 128
  • Codabar
  • Interleaved 2 of 5
  • EAN-8
  • EAN-13
  • UPC-A
  • UPC-E
  • Industrial 2 of 5

• 2D Barcodes:

  • QR Code (including Micro QR Code)
  • Data Matrix
  • PDF417 (including Micro PDF417)
  • Aztec Code
  • MaxiCode (mode 2-5)

• Patch Code

• GS1 Composite Code