scan-dpm-codes

🏷️ Scan DPM Codes

A focused demo for decoding Direct Part Mark (DPM) barcodes from camera video or static images using the Dynamsoft Barcode Reader (JavaScript edition). DPM codes are DataMatrix symbols marked directly onto parts — by laser etching, dot-peening, or chemical etching — rather than printed on a label. They are common in industrial, aerospace, and automotive traceability applications.

Included files

• index.html — demo page (camera & image input).
• ReadDPM.json — Example template used by the demo.

✨ Features

• Targeted DPM decoding with DPMCRM_GENERAL mode for marks etched or dot-peen on surfaces
• DPM-specific localization (LM_STATISTICS_MARKS, LM_CONNECTED_BLOCKS) for low-contrast or irregular marks
• Centered scan region (25 %–75 % of frame) to focus decoding on the mark area
• Camera and static image input support

🔧 How it works

• The demo initializes a BarcodeScanner instance and loads ReadDPM.json via templateFilePath, activating DPM-optimized localization and decoding parameters.
• A centered scan region is set via cameraEnhancer.setScanRegion() to reduce noise from surrounding surfaces.
• Decoded results are surfaced through the standard launch() callback; configuration can be tuned via ReadDPM.json without changing application code.

Quick start

Opening HTML files directly may not work as expected. Instead, run a local development server. Here's a quick method using Visual Studio Code:

1. Install the Five Server extension from the VS Code Marketplace.

2. Right-click on index.html and select "Open with Five Server".

💡 Tips

• Ensure even, diffuse lighting — direct reflections from etched or dot-peen surfaces significantly reduce decode reliability.
• Hold the camera steady and close; DPM marks are typically small and low-contrast.
• Narrow the scan region further if the part occupies only a small portion of the frame.

📌 Notes

• Serve via localhost or HTTPS to enable camera access.
• Replace the demo/trial license with a valid Dynamsoft license for extended evaluation or production use.
• See the repository root README.md for running instructions and API documentation links.