Importance of Imaging Technology
The first step in image analysis is “accurate imaging”. Kowa Optronics places great importance on lens and camera selection, and the following points in particular are directly linked to the accuracy of analysis.
High-Resolution Lens
It is essential for reliably detecting minute scratches and foreign objects. Its high-resolution design enables clear imaging down to the finest details.
Low Distortion Design
Prevents errors in dimensional measurements, etc., and eliminates the need for software distortion processing.
Environmental Resistance Performance
Factories contain numerous factors that interfere with imaging, such as dust and vibration. Environmental resistance enables stable imaging even under such harsh conditions.
Preprocessing Technology
The captured images are pre-processed before analysis, which removes noise and adjusts contrast to improve analysis accuracy.
・Grayscale Conversion
・Filtering (Smoothing and Sharpening)
・Histogram Correction
・Mask Processing
Kowa Optronics’ image processing unit (KP-VP series) can perform these processes in real time.
Feature Extraction and Analysis
This is the process of extracting meaningful information from images.
The KP-VP series enables the following types of analysis:
Edge Detection：Extracting scratches and contours
Shape Recognition：Determining the presence or absence, and orientation of parts
Pattern Matching：Determining whether an image matches a registered image
AI-OCR：Character recognition while correcting faint or missing characters
Judgment/Classification
Based on the extracted features, products are judged as pass/fail and classified, and a wide range of inspections are possible, including:
・Determination of good/defective products
・Detection of foreign object contamination
・Dimensional acceptance/rejection judgment
・Printing accuracy verification
Furthermore, it is equipped with a system that immediately detects abnormalities.When a defect is detected, an alert is sent, allowing for swift countermeasures to be taken. In addition, parts that are judged to be “abnormal” are displayed on a heat map, making it possible to visualize processing defects. This allows you to identify problem areas and minimize the occurrence of defective products.
Output and Linkage
The analysis results are output to a PLC, robot, or host system and reflected in the next process.
Supports interfaces such as GigE and CoaXPress , allowing for flexible system construction.
Application Examples
Food Factories：Inspection of printing on packaging films
Pharmaceuticals：Inspection of tablets for foreign matter
Logistics：Reading barcodes on slips
Automotive parts manufacturing：Detection of chipped cutting edges
Summary
Image analysis is not simply image processing, but an advanced technology that combines optical technology, AI, and control technology. Kowa Optronics provides lenses, cameras, and image processing units as a complete package, enabling us to realize optimal analysis solutions for each site.
