Method and system for quantifying contaminated QR Codes

Abstract

The invention relates to a method and system for quantifying contaminated QR Codes. In the method, contamination comprises data and error correcting codeword contamination, boundary contamination, position detection figure contamination, correction figure contamination, positioning figure contamination, version information contamination and format information contamination; and contamination quantification of different degrees is performed on different positions of bar codes according to different contamination models, wherein the contamination degree of the QR codes is not greater than the error correcting capability of the bar codes themselves for error codes, the quantity of encoding characters of the QR codes is equal to the quantity of characters corresponding to data codewords specified by a current bar code version and an error correcting grade, the condition of adding filling characters does not exist, the data and error correcting codeword contamination does not comprise residual bits, and the contamination mode can employ an early-stage printing contamination mode and a later actual contamination mode. According to the invention, the problems of incapability of quantitatively evaluating scanning performance of a scanner for contaminated bar codes at present, large test personnel cost and lack of representativeness of test results are solved.

Description

technical field [0001] The invention relates to a method and system for quantifying defaced QRCode. Background technique [0002] In the field of barcode scanning, people often encounter the situation that the barcode to be scanned is defaced. The defacement is nothing more than barcode pollution, barcode damage, barcode wrinkling, barcode fading and blurring, etc. The essence of these defacements is the barcode The black-and-white color module in is destroyed, making the scanner unable to recognize the reflectivity of the current module, resulting in the scanner being unable to decode. Whether the scanner can scan the defaced barcode is determined by the data error correction capability of the barcode itself and the scanning algorithm of the scanner. At present, there is no systematic method on the market to quantitatively evaluate the scanning performance of a scanner on defaced barcodes. [0003] On the other hand, the defaced positions of the barcodes that appear on th...

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Problems solved by technology

[0004] The present invention makes improvements to the problems existing in the above-mentioned prior art, that is, the technical problem to be solved by the present invention is to provide a method and system for quantifying defaced QRCodes, which helps to solve the currently unquantifiable evaluation of scanners against defaced barcodes. Problems such as poor scanning performance, high labor costs for testing, and unrepresentative test results

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