Special-Shaped Code Recognition Using Coordinate Masking

The patent segments the special-shaped code recognition process into distinct modules: obtaining the special-shaped code image, determining the code region through coordinate processing, generating a mask image to isolate the code area, and performing recognition on the extracted code. This segmentation transforms the difficult task of recognizing arbitrary-shaped codes into a series of manageable processing steps, thereby maintaining the anti-counterfeiting benefits while solving the recognition difficulty.

The patent utilizes parameter changes in the image processing pipeline to handle diverse special-shaped codes. By dynamically adjusting parameters such as coordinate transformations, mask generation thresholds, and region extraction criteria, the system can adapt to various code shapes and designs without requiring fundamentally different recognition approaches, thus managing complexity while maintaining design flexibility.

The patent performs preliminary calculations to determine the target frame data stream size and compute the coordinate points of the special-shaped code region before generating the mask image. By pre-calculating these parameters, the system establishes an accurate framework for code region identification upfront, which then facilitates faster and more precise mask generation and recognition in subsequent processing steps, effectively balancing precision with processing efficiency.