Dual-Layer QR Code Frame for Long-Range Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing QR code solutions for visually impaired individuals are limited by small detection distances and sensitivity to blurring, as they rely on small location patterns within the code, which are affected by the code's resolution and scale, making it difficult for visually impaired users to locate and read QR codes from a distance or in adverse conditions.
Innovation Solution
A system comprising a first code with a smaller reading distance and higher information density, surrounded by a second code with a larger reading distance and lower information density, using a double location frame of different colors or shades to enhance detection range and robustness against blurring, independent of the inner code's characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the QR code contains more information, then the information density increases, but the resolution required increases causing the location squares to become smaller, which reduces the detection distance
Solution Approach 1:
The code is divided into two independent parts: a first code containing dense information and a second code containing location information. This segmentation allows each code to be optimized for its specific function without compromising the other, resolving the contradiction between information density and detection distance.
Solution Approach 2:
The second code acts as an intermediary that provides location information independently of the first code. This intermediary code enables the system to achieve both high information density in the first code and long detection distance through the second code's location markers.
2Device complexity
If the location pattern is made smaller to fit within the code, then the code structure is maintained, but the detection distance is reduced
Solution Approach 1:
The location information is placed in a separate spatial dimension (the second code surrounding the first code) rather than compressing it within the same dimension. This allows the location pattern to be larger and more detectable without affecting the first code's structure or information density.
3Quantity of substance
If the location squares are made smaller to accommodate more data, then the information capacity increases, but the detection distance decreases
Solution Approach 1:
The code system is segmented into two independent codes with distinct functions. The first code maximizes information capacity while the second code provides location information with larger, more detectable markers, eliminating the trade-off between information capacity and detection distance.
Data Source
Figure 1~2
Figure 3~7
Figure 8~13
AI summary
The invention relates to a code (1), made up of a first code (Q1) and a second code (Q2), wherein the maximum reading distance (L1) of the first code (Q1) by a camera (CA) is smaller than the second maximum distance (L2) of the second code (Q2); and the information density (D1) of the first code (Q1) is greater than the information density (D2) of the second code, and wherein the first code (Q1) occupies a square central region and wherein the second code (Q2) is a frame (M1) made up of squares of at least two different colors (C1, C2) or two different shades that entirely surrounds the first code (Q1) on all four sides. The invention also relates to a packaging, product, or document provided with the code and also to a method for extracting the information contained in the code (1).