Monochrome QR Code Generation for Print Recognition
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Solution Overview
Problem
Monochrome printers, such as black and white printers, have a low recognition rate for QR codes printed from color or grayscale images, leading to unrecognizable or incorrectly recognized QR codes when scanned.
Innovation Solution
A method and apparatus that convert color or grayscale QR code images into monochrome images, maintaining the same size and information, which are then printed, enhancing recognition rates by using a processor to determine the position and size of the QR code within an image and overlaying or replacing the original QR code with a monochrome version.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If color or grayscale QR code images are printed directly by monochrome printers, then the printing process is simple, but the recognition rate is low
Solution Approach 1:
The patent applies preliminary action by converting the QR code image to monochrome format before printing. The processor detects the QR code in the original color or grayscale image, converts it to a monochrome image with proper contrast, and then prints it. This preprocessing ensures that the QR code is optimized for monochrome printer output, thereby improving recognition rate while maintaining simple printing operations.
2Reliability
If the original QR code image is converted to monochrome, then the recognition rate improves, but the processing time increases
Solution Approach 1:
The patent applies the extraction principle by isolating and processing only the QR code portion of the image rather than the entire image. The processor detects the QR code's position and boundaries, extracts it from the original image, converts only this extracted portion to monochrome format, and then prints it. This selective processing significantly reduces the processing time compared to converting the entire image while still achieving improved recognition rate.
3Reliability
If the QR code image size is increased to improve scanability, then the recognition rate improves, but the area occupied in the document increases
Solution Approach 1:
The patent applies the merging principle by combining the QR code conversion with the existing printing workflow. The processor integrates the QR code detection, monochrome conversion, and printing steps into a unified process that works with the document's existing layout. The converted monochrome QR code maintains appropriate sizing relative to the document format, ensuring improved scanability without unnecessarily increasing the area occupied in the final printed document.
Data Source
AI summary
The present disclosure relates to a method for generating a quick response QR code and a printing apparatus, a method for generating a quick response (QR) code, comprising obtaining an original image of the QR code, wherein the original image of the QR code is a bitmap image and is a color image or a grayscale image; obtaining information contained in the QR code; and generating a monochrome image of the QR code based on the information.