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The IP.com Prior Art Database
Undisclosed
English (United States)
Method and Apparatus of Visual Inspection for QR-code Printed Quality
Background QR code (short for Quick Response Code) is the trademark for a type of matrix
barcode. QR code system became popular outside the automotive industry due to its fast readability and greater storage capacity compared to standard UPC barcode. It is widely used in lots of applications, including product tracking, item identification, time tracking, document management, and general marketing. Since QR-code contains more information, it can provide strong identification capability for product classification and tracking. Different from the usage of barcode for distinguish one category from other categories, QR-code can identify one item from other items in the same or different categories, which bring tremendous demand on the printing. Undoubtedly, printing a lot of different QR-code will bring a large number of defects. Benefits from the robustness, the defects in a QR-code may not affect the readability, however, it will degrade the products’ appearance and business values. For example, Apple Corporation cannot tolerate any printing defects on their producets. Besides, the
printing quality is important for the OEM, If DPPM (defect parts per million）increase
1%, printing revenue decrease an order of magnitude. Therefore, visual inspection of QR-code printing quality is necessary for lots of printing factories.
Prior Arts
Few literatures about how to elevate printing quality of QRcode: 1. US6170747B1: “Apparatus for inspecting print quality of barcodes on a high speed
moving web ” 2. Research on Barcode Online Defect Detection System Based on Machine V...
