computer vesion
TRANSCRIPT
Computer Vesion
What is computer vesionDefinition:The goal of computer vesion is to make useful decisions about real physical objects and scenes based on sensed images.OrComputer vision is a subfield of artificial intelligence where information is obtained through the characteristics of images captured by industrial cameras. Below, there are some of the techniques and applications performed at ITMA.
mateial techlngy,tecnlogy center in austria
Computer vision (image understanding) is a discipline that studies how to reconstruct, interpret and understand a 3D scene from its 2D images in terms of the properties of the structures present in the scene.
The ultimate goal of computer vision is to model and replicate human vision
using computer software and hardware at diferent levels. It combines knowledge in computer science,electrical engineering,
mathematics, physiology, biology, and cognitive science. It needs knowledge from all these fields in order to understand and
simulate the operation of the human vision system. that focuses on extracting useful information from images and videos.
Examples of "useful information" include detecting the presence and identify of human faces in a photograph, recovering the 3D geometry of the objects in a photograph, and tracking and recognizing different types of motion in a video sequence.
Computer vision algorithms have found a wide range of applications from 3D laser scanning systems used in manufacturing, city planning, entertainment, forensics, etc
Computer vision overlaps significantly with the following fields:Image processing. Image processing focuses on image manipulation to enhance image quality, to restore an image or to compress/decompress an image. Most computer vision algorithms usually assumes a significant amount of image processing has taken place to improve image quality.pattern recognition, Pattern recognition studies various techniques such as statistical techniques, neural network, support vector machine, etc to recognize/classify di erent patterns. Pattern recognition techniquesff are widely used in computer vision.photogrammetry. Photogrammetry is concerned with obtaining accurate and reliable measurements from images. It focuses on accurate mensuration. Camera calibration and 3D reconstruction are two areas of interest to both.
Relation of Computer Vision
Computer Vision Hierarchy
• Low-level vision: process image for feature extraction (edge,corner, or optical flow).
• Middle-level vision: object recognition, motion analysis, and 3D• reconstruction using features obtained from the low-level vision.• High-level vision: interpretation of the evolving information• provided by the middle level vision as well as directing what• middle and low level vision tasks should be performed.• Interpretation may include conceptual description of a scene• like activity, intention and behavior.• we focus mainly on middle level and some low level.
Computer Vision
Make computers understand images and videos.
What kind of scene?
Where are the cars?
How far is the building?
…
Components of a computer vision system
Lighting
Scene
Camera
Computer
Scene Interpretation
Srinivasa Narasimhan’s slide
How the Afghan Girl was Identified by Her Iris PatternsSign of War and poverty
Sharbat Gula was the girl who had been photographed 17 years earlier in 1985, the EXPLORER team obtained verification through iris-scanning technology and face-recognition techniques used by the U.S. Federal Bureau of Investigation.she again recognized by iris patttern in 2002 after long searchshe caught agian in pakistan some days before during NIC verifaction3/21/2015
Example Applications• Robotics• Medicine• Security• Transportation• Industrial automation• Image/video databases• Human Computer Interface• Localization-determine robot location automatically (e.g.• Vision-based GPS)• Obstacles avoidance• Navigation and visual servoing• Assembly (peg-in-hole, welding, painting)• Manipulation (e.g. PUMA robot manipulator)• Human Robot Interaction (HRI): Intelligent robotics to• interact with and serve people• Biometrics (iris, finger print, face recognition)• Surveillance-detecting certain suspicious activities or behaviors
References
• http://www.cns.nyu.edu/eero/vision-links.html• http://www.cs.berkeley.edu/daf/book.html• http://www.visionbib.com• http://www.cs.virginia.edu/~gfx/Courses/2011/C
omputerVision/