SurfaceFX Feature Extraction

Isolates raised or embossed features for accurate, reliable inspections of stamped text or codes

SurfaceFX feature extraction technology uses lighting and software algorithms to create high contrast images that enhances 3 dimensional features on a part. It removes noise and clutter from the surface background and isolates features and defects that are recessed or embossed on parts highlighting surface defects such as chips, dents, wrinkles, punctures and tears as well as identifying stamped text and codes. Once a clear image is attained, In-Sight vision tools such as OCRMax, PatMax Redline, Blob and InspectEdge can perform their inspections. SurfaceFX technology is trusted by industries including consumer goods, automotive and electronics to:

• Identify surface defects
• Extract 3D features
• Identify parts
• Track parts

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Advanced lighting algorithm separates features from background

Cognex has developed a lighting algorithm that illuminates parts from 4 different angles. The shadows and reflections are analysed to identify the 3-dimensional features creating an image highlighting those raised or recessed features. Raised features are displayed white and indented features are displayed black. High contrast images acquired with SurfaceFX technology allows Cognex’s best-in-class vision tools to complete the inspection by locating patterns, edges, blobs, text or other features.

Reliably read stamped codes on products and packaging

Many manufacturers use stamping because it is a relatively low cost, reliable marking method. However, it is often difficult to detect the stamped information because there is little contrast between the molded or embossed stamp and the packaging material. SurfaceFX technology clearly highlights the characters or codes allowing the OCR tool to read the date, lot code, symbols or other information.