Image Processing for Distance-Compensated Surface State Evaluation
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Solution Overview
Problem
Existing methods for evaluating the surface state of an object, such as orange peel, are inadequate when the image capturing distance changes, leading to inconsistent and inaccurate assessments.
Innovation Solution
An image processing apparatus that acquires image data, calculates distance information, and corrects an optical profile based on this information to evaluate the surface state, enabling accurate assessment regardless of capturing distance changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the image capturing distance changes, then the amount of change in shape of the projection pattern changes, but the surface state evaluation becomes inaccurate
Solution Approach 1:
The patent applies parameter changes by introducing distance information as a new parameter to compensate for the effects of capturing distance changes. The processing unit calculates a corrected amount of change in shape by combining the original amount of change with distance information, thereby adjusting the evaluation to account for varying capture distances while maintaining measurement precision
Solution Approach 2:
The patent uses distance information as an intermediary element to mediate between the projection pattern changes and the surface state evaluation. This intermediary parameter allows the system to distinguish between shape changes caused by surface characteristics and those caused by distance variations, enabling accurate evaluation across different capturing distances
2Reliability
If the amount of change in shape is used directly for evaluation, then the evaluation process is simple, but the evaluation results are inconsistent when capturing distance changes
Solution Approach 1:
The patent modifies the evaluation parameter by introducing a corrected amount of change in shape that incorporates distance information. This parameter transformation maintains the simplicity of the original approach while adding the necessary distance compensation to ensure consistent evaluation results across different capturing distances
Solution Approach 2:
The patent applies preliminary action by calculating distance information in advance and using it to correct the amount of change in shape before performing the surface state evaluation. This preliminary correction step ensures that the subsequent evaluation is based on distance-compensated data, improving reliability without significantly increasing overall complexity
Data Source
AI summary
An image processing apparatus includes one or more computer-readable storage media, and one or more processors, wherein the one or more processors and the one or more computer-readable storage media are configured to: acquire image data acquired by capturing an image of an object, acquire distance information about a distance from an imaging apparatus, by which the captured image of the object is captured, to the object, acquire an optical profile representing an attribute of an image reflected on a surface of the object based on the image data and the distance information, and evaluate a state of the surface of the object based on the optical profile.