Basic Vision with LabVIEW

Basic Vision with LabVIEW - Basic Vision with LabVIEW Raul...

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ME 244L – Prof. R.G. Longoria Dynamic Systems and Controls Laboratory Department of Mechanical Engineering The University of Texas at Austin Basic Vision with LabVIEW Raul G. Longoria Department of Mechanical Engineering Fall 2006
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ME 244L – Prof. R.G. Longoria Dynamic Systems and Controls Laboratory Department of Mechanical Engineering The University of Texas at Austin Vision Lab Goals • Learn how to read/create image files using LabVIEW, and how to manage those files • Learn about built-in functions for analyzing image files (select areas, measure intensity, etc.) • Learn how to acquire images using a USB camera • Build a vision-based measurement system, particularly for object motion.
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ME 244L – Prof. R.G. Longoria Dynamic Systems and Controls Laboratory Department of Mechanical Engineering The University of Texas at Austin Options on Pre-Lab Exercises • Concept of image data type, and handling images • Intensity measurements and use of histograms • Understanding basic camera hardware and limitations • Basic functions for acquiring images with IMAQ USB VIs • Understand basic analog meter circuit
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ME 244L – Prof. R.G. Longoria Dynamic Systems and Controls Laboratory Department of Mechanical Engineering The University of Texas at Austin Machine Vision Concepts* Machine (or computer) vision has six principal areas 1. Sensing – which yields a visual image 2. Preprocessing – noise reduction, image enhancement, etc. 3. Segmentation – partitioning an image into objects of interest 4. Description – computation of features for differentiating among types of objects 5. Recognition – identifying objects (e.g., bolt, wrench, etc.) 6. Interpretation – assigning meaning to an ensemble of recognized objects Levels of processing are divided into low (1, 2), medium (3,4,5), and high (6) In this lab, we’ll primarily be concerned with low-level vision, and will utilize some functions of medium-level vision.
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ME 244L – Prof. R.G. Longoria Dynamic Systems and Controls Laboratory Department of Mechanical Engineering The University of Texas at Austin Machine Vision Concepts* Low-level vision involves processes considered ‘primitive’ (or automatic) and requiring no ‘intelligence’ (1,2). This could be thought of as analogous to how a human eye senses and adapts. Medium-level vision extracts, characterizes, and labels components in an image. High-level vision refers to processes that attempt to emulate cognition. *From Fu, Gonzalez, and Lee, Robotics: Control, Sensing, Vision, and Intelligence, McGraw-Hill, New York, 1987.
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ME 244L – Prof. R.G. Longoria Dynamic Systems and Controls Laboratory Department of Mechanical Engineering The University of Texas at Austin Overview of LV-Based Vision Tools • Vision tools in LabVIEW • Image data type • Analyzing images • Capturing images Vision Vision Utilities Image processing Machine vision “NI Measurements” Menu
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ME 244L – Prof. R.G. Longoria Dynamic Systems and Controls Laboratory
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Basic Vision with LabVIEW - Basic Vision with LabVIEW Raul...

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