Colorimetric Value Detection Using Phase Profile Comparison
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Solution Overview
Problem
Manual colorimetry systems face challenges in accurately detecting colorimetric values at specific positions on printed materials due to operator-dependent measurement errors and the difficulty in correctly identifying the measurement position, especially when dealing with large objects or small measurement areas.
Innovation Solution
A colorimetric value detection system that uses a hardware processor to calculate the output color based on target profile information and object information, comparing it with the measured colorimetric value to ensure accurate detection by analyzing the degree of coincidence between phase profiles, and utilizes a guide rail and manual colorimeter to facilitate precise color measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual colorimetry is performed by an operator, then the measurement process is simple and flexible, but the measurement position accuracy deteriorates due to operator-dependent errors
Solution Approach 1:
The patent introduces a guide rail as an intermediary device between the operator and the measurement target. The guide rail physically guides the colorimeter to the correct measurement position, eliminating operator-dependent positioning errors while maintaining the simplicity of manual operation. The guide rail acts as a mediator that translates simple operator actions into precise measurements.
Solution Approach 2:
The patent replaces the purely manual mechanical positioning system with a guided mechanical system. Instead of relying on operator skill to position the colorimeter, the system uses a mechanically constrained guide rail that automatically ensures accurate positioning. This substitution transforms an imprecise manual system into a precise guided system while maintaining ease of operation.
2Loss of information
If the measurement position is presented to the user, then the user is guided to the correct position, but the user may still fail to correctly detect the colorimetric value
Solution Approach 1:
The patent implements a feedback mechanism where the system compares the measured colorimetric value with the expected output color calculated from print image data and colorimetric information. When the measured value deviates from the expected value beyond a threshold, the system identifies this as a measurement error and prompts the user to remeasure. This feedback loop ensures that only accurate measurements are accepted.
Solution Approach 2:
The system performs self-verification by automatically comparing measured values against expected values derived from print data. The system identifies measurement errors and requests remeasurement without requiring external verification, enabling the measurement process to self-correct and ensure accuracy.
3Measurement precision
If phase profile comparison is performed to identify the correct measurement position, then the measurement accuracy is improved, but the system complexity increases
Solution Approach 1:
The patent creates a virtual copy of the measurement process by calculating the expected phase profile from print image data and colorimetric information. This virtual phase profile serves as a reference template that is compared against the actual measured phase profile. The copying approach allows for accurate verification without requiring additional physical measurement equipment.
Solution Approach 2:
The patent transforms the measurement verification process from direct color value comparison to phase profile parameter comparison. By analyzing the phase characteristics (position, shape, intensity distribution) rather than simple color values, the system achieves more robust and accurate measurement verification. This parameter transformation enables more precise error detection while managing computational complexity.
Data Source
AI summary
A colorimetric value detection system detects a colorimetric value at a colorimetric position of a printed material using a colorimeter, and the colorimetric value detection system includes: a hardware processor that: calculates an output color of an object at the colorimetric position on the basis of target profile information of a printing device and object information of the printed material; and compares the colorimetric value of the colorimeter with the output color calculated by the hardware processor, wherein the colorimetric value of an object or at a position desired by a user is specified from a degree of coincidence of phase profiles of the colorimetric value.