Indoor Navigation Using Barcode Color Blocks for Handheld Terminals
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Solution Overview
Problem
Current indoor navigation methods for handheld terminals in complex environments require high hardware and software specifications, leading to lower navigation precision and higher costs, and struggle to quickly and accurately calculate precise real-time positions.
Innovation Solution
The method involves using a handheld terminal with a camera to obtain images of barcode labels with color blocks, analyzing the identifier information, and calculating coordinates in both pixel and world coordinate systems to determine the terminal's position, utilizing a preset color block selection and coordinate calculation rule to improve navigation precision at lower costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional indoor navigation methods are used, then navigation coverage is provided, but hardware and software requirements are high and navigation precision is low
Solution Approach 1:
The patent uses barcode labels as simplified copies of complex navigation markers. These barcode labels contain encoded position information that can be read by standard camera equipment, replacing the need for complex specialized navigation hardware while maintaining positioning accuracy through coordinate system transformation
Solution Approach 2:
The patent replaces complex mechanical or specialized sensing navigation systems with a vision-based system using standard camera equipment. By substituting mechanical positioning sensors with optical image capture and computational coordinate transformation, the system achieves high precision navigation with lower hardware requirements
2Measurement precision
If existing navigation solutions are deployed, then indoor navigation is enabled, but real-time position calculation is not quick and accurate
Solution Approach 1:
The patent pre-establishes the correspondence relationship between barcode label positions in the image and real-world coordinates before actual navigation. This preliminary calibration creates lookup tables and transformation matrices that enable rapid real-time position calculation without complex computations during active navigation
Solution Approach 2:
The patent uses two-dimensional barcode labels that encode position information, allowing the system to quickly read and decode position data from images. The barcode structure enables rapid information extraction compared to analyzing complex natural features, achieving both speed and accuracy in position calculation
3Reliability
If more hardware and software resources are allocated, then navigation functionality is improved, but system cost increases
Solution Approach 1:
The patent makes the handheld terminal's camera serve multiple functions: it acts as both a navigation sensor for position determination and a general-purpose imaging device. This multi-functionality eliminates the need for dedicated navigation hardware, reducing system cost while maintaining navigation reliability through software-based processing
Solution Approach 2:
The patent uses standard barcode technology, which is a well-established and low-cost solution, to create navigation markers. These barcode labels can be printed using conventional methods and read by existing camera equipment, avoiding the need for expensive specialized navigation infrastructure while ensuring reliable navigation performance
Data Source
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AI summary
This application discloses an indoor navigation method of a handheld terminal, including: after receiving an indoor navigation instruction, controlling a camera to obtain an image within a scope of a lens, performing analysis on a barcode of a barcode label in the image, obtaining identifier information of each barcode label, and selecting color blocks from at least two barcode labels according to a color block selection rule; calculating coordinates corresponding to each of the color blocks in a pixel coordinate system according to a position of each selected color block in the image within the scope of the lens; and calculating coordinates corresponding to each of the color blocks in a world coordinate system on the basis of association data of identifier information of the barcode labels and coordinates of the color blocks in the world coordinate system according to a barcode label at which each selected color block is located, and calculating coordinates of the handheld terminal in the world coordinate system according to a coordinate calculation rule. The present invention further discloses a handheld terminal for indoor navigation and a storage medium. This application can quickly and accurately calculate a precise real-time position of the handheld terminal, thereby improving indoor navigation precision.