Image Processing Apparatus Reference Coordinate System Determination

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Solution Overview

Problem

The accuracy of feature point detection in images is compromised due to the indefinite position and orientation of the reference coordinate system, leading to errors in feature point analysis, matching, and three-dimensional shape measurement.

Innovation Solution

An image processing apparatus that determines a reference coordinate system by generating a different image through conversion processing, detecting feature points in both original and different images, and calculating an evaluation value based on positional errors to select the optimal coordinate system for accurate feature point detection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If feature points are detected based on a predetermined coordinate system with indefinite position and orientation, then the detection process can be performed, but positional errors arise in the feature point coordinates

Engineering Contradiction:

Improvefeature point detection capabilityVSAvoidfeature point coordinate accuracy

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The patent applies preliminary action by determining the reference coordinate system before detecting feature points. The system first identifies the appropriate coordinate system from multiple candidates based on image characteristics, and only then proceeds with feature point detection. This ensures that feature points are detected using the correct coordinate system, preventing positional errors while maintaining detection capability.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent changes the parameter of coordinate system selection by evaluating multiple possible coordinate systems and selecting the most appropriate one based on image characteristics. The system adjusts the coordinate system parameter dynamically rather than using a fixed predetermined system, thereby improving measurement precision while preserving productivity.

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If multiple coordinate systems are considered to improve accuracy, then positional errors are reduced, but the complexity of determining the reference coordinate system increases

Engineering Contradiction:

Improvefeature point coordinate accuracyVSAvoidcoordinate system determination process

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent implements feedback by evaluating the suitability of different coordinate systems based on image characteristics and selecting the most appropriate one. The system continuously assesses which coordinate system provides the best alignment and accuracy for the given image, creating a feedback loop that simplifies the complexity through intelligent selection rather than exhaustive evaluation of all possibilities.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20250022169A1Image processing apparatus, image processing method, and storage medium

Publication Date: 2025.01.16 CANON KK

AI summary

An image processing apparatus includes one or more memories storing instructions, and one or more processors that, upon execution of the stored instructions, are configured to perform predetermined conversion processing on a first image including a subject to generate a second image, detect feature points of the subject from the first and second images, and determine a reference coordinate system for a detector for detecting feature points based on a relation between a result of detecting feature points in the first image and a result of detecting feature points in the second image.