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DM312 - W10

Machine vision

QuestionAnswer
What are 2 examples of Inspection for Typical Machine Vision Applications? Quantitative and Qualitative
What are some examples of Quantitative Inspection? Measuring the width of a steel strip emerging from a rolling mill, in-process gauging, dimensionally components on a moving conveyor.
What are some examples of Qualitative Inspection? Detection of – filaments, chips, cracks in glass bottles; cracks in castings; foreign bodies on a food processing plant conveyor line; verification of a completed task; identification of component orientation for printed circuit board assembly.
How can Typical Machine Vision be used for Identification? OCR (optical character recognition) for product and component tracking, mail sorting, cheque reading, currency inspection, facial recognition.
How can Typical Machine Vision be used for Providing information for High Level Decision Making and Control? For example used in conjunction with artificial intelligence for mobile robot guidance, for determining the order of assembly of components, and for seam tracking in an arc welding application.
What are the 7 Typical Machine Vision System Components? Camera, initial image processing hardware/software, A Frame Store, Hardware & software for image analysis, Scene llumination system, Interfacing equipment to link the vision system, System to make physical action in response to the visual data.
What 2 sensor types are prevalent in the Camera system? Charge Coupled Device (CCD) or Complementary Metal-Oxide-Semiconductor (CMOS) sensors are commonly used in cameras with CMOS becoming increasingly popular.
Talk to the difference in price for CCD vs CMOS sensors CMOS sensors have lower power consumption and can be produced using standard fabrication processes hence making them relatively cheap compared to CCDs that require a specialised process.
What is the adoption of CCD vs CMOS sensors within manufacturing? CMOS sensors and cameras have in recent years overtaken CCD sensors in popularity for machine vision systems in manufacturing.
What is 1 draw back of CMOS? CMOS sensors have a faster frame rate however this can result in distortion of fast moving objects due to the scanning method employed.
Are CCD's still used? And why? CCD sensors are still used as they can produce high quality images and operate in low light and low contrast applications. They are also used in astronomy, surveillance, and military imaging.
What are the steps in Image Processing? Quantisation, Encoding, Picture Storage, Minimisation of Image Data, Thresholding, Image Creation, and Image Analysis
Created by: Hcorm002
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