Enhancing the Data Storage Capacity in QR Code Using Compression Algorithm and Achieving Security and Further Data Storage Capacity Improvement Using Multiplexing
CQR codes: Colored quick-response codes
Use multiplexing to increase information in QR code
Color QR Codes: Increased Capacity Via Per-Channel Data Encoding and Interference Cancellation
Digital Image Processing
To increase data capacity of QR code using multiplexing with color coding: An example of embedding speech signal in QR code