Image Processing Apparatus for Curved Surface Color Evaluation
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Solution Overview
Problem
Existing image processing techniques for evaluating object colors are influenced by the shape of the object and image capturing conditions, leading to inconsistent color evaluations.
Innovation Solution
An image processing system that uses a marker with known positional relationships of marks on the object's surface to correct image data, allowing for independent evaluation of object colors by capturing and normalizing images, reducing the impact of shape and capturing conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If image capturing is performed on objects with different shapes and under different capturing conditions, then the evaluation can cover various objects and conditions, but the color evaluation becomes inconsistent and dependent on shape and capturing conditions
Solution Approach 1:
A marker with known positional relationships is introduced as an intermediary element that is placed on the object surface. This marker serves as a reference frame that mediates between the object and the imaging system, enabling consistent color evaluation across different objects and capturing conditions by providing a common reference for correction
Solution Approach 2:
The system changes the parameter representation by extracting positional relationships from the marker and using these parameters to correct the image data. By transforming the raw image coordinates into corrected coordinates based on the marker's known geometry, the system achieves consistent color evaluation independent of capturing conditions
2Measurement precision
If a marker with known positional relationships is used to correct image data, then color evaluation consistency is improved, but the device complexity increases due to marker placement and processing
Solution Approach 1:
The marker is designed to be self-identifying through its specific geometric pattern of marks. The system automatically detects and extracts the positional relationships of the marker marks from the captured image without requiring manual intervention or complex calibration procedures, making the process self-service and reducing operational complexity
Data Source
AI summary
The present invention provides an image processing apparatus for evaluating a surface of an object using a marker including marks whose positional relationship in a case where the marker is arranged in plane is known, the maker being arranged on the surface of the object. The image processing apparatus includes: a first acquisition unit configured to obtain image data obtained by capturing an image of the surface and an image of the marker arranged on the surface; a second acquisition unit configured to obtain information indicating positional relationship among the marks included in the marker; an extraction unit configured to extract the positional relationship among the marks included in the marker in an image indicated by the image data; and a correction unit configured to correct the image data based on the positional relationship indicated by the information and the extracted positional relationship.