Parcel Recognition Device Using Color Subtraction for Sorting
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Solution Overview
Problem
The increasing volume of parcel circulation and diversity of parcel types pose challenges in efficiently and precisely sorting parcels, as existing manual sorting methods are time-consuming and prone to errors, especially when parcels have similar colors and projection images.
Innovation Solution
A parcel recognition device and system that uses a processor and memory to subtract the color of a projection image from the color of a parcel's image projection surface, setting the resulting color as a recognition target, and combines this with label reading and image projection to accurately identify and sort parcels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual sorting methods are used, then operational simplicity is maintained, but sorting efficiency and precision deteriorate due to time-consuming processes and errors with similar-colored parcels
Solution Approach 1:
The patent replaces manual mechanical sorting operations with an automated optical recognition system. A color image sensor captures images of parcels, and an image processing unit automatically analyzes color information to identify and sort parcels, substituting human visual inspection and manual handling with automated optical-mechanical systems.
Solution Approach 2:
The system enables parcels to be automatically identified and sorted based on their inherent color characteristics without requiring manual intervention. The image processing unit autonomously analyzes color data from the color image sensor and directs sorting actions, allowing the system to serve itself in the sorting process.
2Measurement precision
If color-based recognition is used for parcels with similar colors, then sorting precision improves, but reliability deteriorates due to inability to distinguish parcels with identical projected colors
Solution Approach 1:
The patent transitions from analyzing only color information to incorporating spatial position information as an additional dimension. The image processing unit determines both the color and the positional coordinates of each parcel in the captured image, creating a multi-dimensional identification space where parcels are distinguished by the combination of color attributes and spatial location, enabling reliable differentiation even when colors are identical.
Solution Approach 2:
The system changes the recognition parameters from solely color-based to a composite of color and position parameters. By introducing position coordinates as an additional discrimination parameter, the system expands the parameter space for parcel identification, allowing reliable distinction between parcels that share similar color characteristics.
Data Source
AI summary
There is provided a parcel recognition device that recognizes a parcel based on a color image including the parcel, the device including: a processor; and a memory, in which by cooperating with the memory, the processor subtracts a color of a projection image from a color of an image projection surface of the parcel on which the projection image is projected, in the color image, and sets a color obtained by the subtraction as a color of a recognition target, and recognizes the parcel.