The 'Open with Camera' caption interfered with QR code scanning

In this article, the author explores a technical issue encountered while working with SVG-based QR codes. It was discovered that at certain resolutions, specifically 640 pixels, the embedded 'Open with Camera' caption was incorrectly identified by the algorithm as part of the QR code, preventing successful scanning. The issue disappeared when the image was scaled down to 320 pixels. The author provides a detailed analysis of how the locator misinterpreted text elements as positioning markers and describes the debugging process. The post includes control experiments, an explanation of the root cause, and a solution that allows the caption to remain in place without compromising code readability. The article provides source code and practical examples to help developers understand the nuances of QR code recognition libraries.