Phased Defect Image Inspection for Variable-Quality Product Images
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Solution Overview
Problem
Conventional rule-based models for defect detection in products are inefficient due to the need for manual rule updates with new products and are highly sensitive to image quality variations, leading to inaccurate determinations and potential delivery of defective products.
Innovation Solution
A method using phased pass/fail determination with multiple deep learning-based models, including classification, object detection, and segmentation models, to enhance detection accuracy and handle varying image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a rule-based model is used for defect detection, then the system is simple to implement, but the detection accuracy deteriorates when image quality varies due to equipment aging, lighting changes, or weather conditions
Solution Approach 1:
The patent transitions from a rule-based system to a deep learning-based system that automatically learns patterns from images. The model adapts to variations in image quality caused by equipment aging, lighting changes, and weather conditions by extracting features automatically rather than relying on fixed rules, thereby maintaining detection accuracy across different operating conditions.
Solution Approach 2:
The deep learning model automatically learns from training data and adapts to different imaging conditions without requiring manual updates to detection rules. The system self-adjusts to handle variations in image quality through its learned representations, eliminating the need for continuous manual intervention to update detection criteria.
2Adaptability or versatility
If manual rules are added for new products, then the system can handle new product types, but the operational complexity increases and detection performance varies
Solution Approach 1:
The deep learning model serves as a universal detection system that can handle multiple product types and defect patterns through a single trained model. Instead of requiring separate rules for each product type, the model learns generalizable features from training data and applies them across different products, maintaining consistent performance without increasing operational complexity.
Solution Approach 2:
The system performs preliminary training on diverse product images and defect patterns before actual detection. This pre-training phase allows the model to learn and internalize detection criteria for various product types in advance, enabling it to handle new products without requiring manual rule addition during operation.
3Reliability
If the detection system processes all products sequentially, then comprehensive inspection is achieved, but the process cycle time increases
Solution Approach 1:
The patent implements a two-stage detection process where the first stage uses a classification model for quick pass/fail determination on obvious defects, and the second stage applies object detection and segmentation models only when necessary. This partial application of complex analysis only where needed maintains inspection completeness while significantly reducing overall processing time compared to sequential analysis of all products.
Data Source
AI summary
A method and an apparatus for detecting a defect based on a phased pass/fail determination are disclosed. According to at least one aspect of the present disclosure, a method comprising: a process of acquiring a product image which is an image of the product; a first determination process of inputting the product image into a first determination model to perform a pass/fail determination for the product; and a second determination process of inputting the product image into a second determination model to perform a pass/fail determination for the product when the product is determined to be undeterminable as a result of the pass/fail determination of the first determination process.


