Method and system for anomaly detection

A system for detecting anomalies on a manufactured device, the system comprising:

• a moveable stage for holding and positioning the device;
• a camera for capturing an image of the device on the stage;
• a digitizer coupled to the camera for producing a digital-pixel-based representation of the image;
• a computer having a processor and memory, the computer coupled to the digitizer for receiving the digital-pixel-based representation from the digitizer and coupled to the stage for selectively moving the stage to align the device;
• and
• the computer is programmed to be operable to:
• symbolically decompose a digital-pixel-based representation of the image to create a primitive-based representation of the image;
• analyze the primitive-based representation of the image to detect and locate any anomalies;
• and
• the computer further to develop a histogram of angles and lengths of objects within the image and compare the histogram to a reference histogram of a reference image to determine the rotational shift of the image.

A method for detecting anomalies on a manufactured device, the system comprising:

• placing the manufactured device on a moveable stage;
• capturing and preparing a digital-pixel-based representation of the image;
• symbolically decomposing the digital-pixel-based representation of an image to create a primitive-based representation of the image;
• analyzing the primitive-based representation of the image to detect and locate any anomalies;
• and
• wherein the step of decomposing the digital-pixel-based representation of an image includes aligning geometric objects in the pixel-based representation of the image with respect to rotation by developing a histogram of angles and lengths and matching them with a reference histogram of a reference image to determine a rotational shift.