Memory Color Chart Calibration for Preferred Image Reproduction

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing color charts, such as the X-Rite 24-color chart, primarily focus on accurate restoration of real surface colors without considering the influence of memory colors, which are the preferred colors in human perception, leading to a discrepancy in color reproduction quality.

Innovation Solution

A method combining instrument measurement of surface colors with psychophysical visual experiments to determine preferred memory colors, using an elliptical memory color model to establish a relationship between evaluation data and color space coordinates, and adjusting color patches to match both the preferred memory colors and surface colors.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If standard color charts use real surface colors of objects, then color restoration accuracy is improved, but user perception quality deteriorates due to ignoring memory color preferences

Engineering Contradiction:

Improvecolor restoration accuracyVSAvoiduser perception quality

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The patent changes the color parameters of color patches by adjusting hue, saturation, and brightness based on memory color preferences. The color adjustment module modifies the original surface color parameters to create preferred memory color parameters, transforming the color characteristics to align with user mental representations rather than physical reality.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent incorporates user feedback mechanisms where subjects evaluate color images and provide preference data. This feedback is used to iteratively adjust and optimize the memory color parameters, creating a closed-loop system that continuously improves color reproduction based on human perception responses.

Inventive Principle:

Principle #23Feedback

2Measurement precision

If color charts focus on accurate surface color representation, then objective color measurement is improved, but subjective color evaluation deteriorates due to mismatch with human memory colors

Engineering Contradiction:

Improveobjective color measurementVSAvoidsubjective color evaluation

Core Design Contradiction:

Measurement precisionVSManufacturing precision

Solution Approach 1:

The patent creates a composite color standard that integrates both objective surface color data and subjective memory color preferences. The color chart combines physically measured color values with psychologically adjusted color values, forming a composite standard that satisfies both measurement accuracy and perceptual quality requirements.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent adds a psychological dimension to traditional color measurement by incorporating memory color preferences into the color evaluation framework. This transforms the color standard from a purely physical measurement tool to a dual-dimension standard that considers both objective color properties and subjective human perception.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Ease of manufacture

If existing color charts use fixed color patches, then manufacturing simplicity is improved, but adaptability to different user preferences deteriorates

Engineering Contradiction:

Improvecolor chart productionVSAvoiduser preference adaptability

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The patent introduces dynamic adjustability to color charts by enabling modification of color patch parameters based on different user preferences and application scenarios. The color standard is no longer fixed but can be dynamically adjusted to match individual memory color profiles while maintaining a standardized base structure for consistent manufacturing.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS12469177B2Method for acquiring a preferred memory color of object and standard color chart of preferred memory color

Publication Date: 2025.11.11 ZHEJIANG UNIV

AI summary

Disclosed is a method for acquiring a preferred memory color of an object and a standard color chart of the preferred memory color. The method comprises the following steps: collecting an original image of a target object with a representative memory color and a spectral reflectance distribution curve of a measured surface color of the target object; rendering the original image to acquire a group of experimental images; acquiring evaluation data of memory color preference of a subject based on the experimental images; obtaining a coordinate value of the preferred memory color; further, selecting a pigment combination of color patches according to the measured spectral reflectance distribution curve of a memory object, and acquiring a color formula of the color patches of the preferred memory color in an experiment from the combination, so as to realize the acquisition of a memory color chart.