1 / 14

Digital Image Processing

Digital Image Processing. Lec1: Introduction. Introduction. “One picture is worth more than ten thousand words” Anonymous. Contents. This lecture will cover: What is a digital image? What is digital image processing? Examples of digital image processing. What is a digital image?.

phoebe
Télécharger la présentation

Digital Image Processing

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Digital Image Processing Lec1: Introduction

  2. Introduction “One picture is worth more than ten thousand words” Anonymous

  3. Contents • This lecture will cover: • What is a digital image? • What is digital image processing? • Examples of digital image processing

  4. What is a digital image? • A digital image is a representation of a two-dimensional image as a finite set of digital values, called picture elements or pixels

  5. 1 pixel What is a digital image? (Cont.) • Pixel values typically represent gray levels, colours, heights, opacities etc • Rememberdigitization implies that a digital image is an approximation of a real scene

  6. What is Digital Image Processing? • Digital image processing focuses on two major tasks • Improvement of pictorial information for human interpretation • Processing of image data for storage, transmission and representation for autonomous machine perception

  7. Uses of DIP • Image enhancement/restoration • Artistic effects • Medical visualisation • Law enforcement • Human computer interfaces

  8. Examples: Image Enhancement • One of the most common uses of DIP techniques: improve quality, remove noise etc

  9. Examples: The Hubble Telescope • Launched in 1990 the Hubble telescope can take images of very distant objects • However, an incorrect mirror made many of Hubble’s images useless • Image processing techniques were used to fix this

  10. Examples: Artistic Effects • Artistic effects are used to make images more visually appealing, to add special effects and to make composite images

  11. Examples: Medicine Take slice from MRI (Magnetic Resounance Imaging) scan of a heart, and find boundaries between types of tissue • Image with gray levels representing tissue density • Use a suitable filter to highlight edges

  12. Examples: GIS • Geographic Information Systems • Digital image processing techniques are used extensively to manipulate satellite imagery • Terrain classification(التضاريس) • Meteorology (الأرصاد الجوية)

  13. Examples: Law Enforcement • Image processing techniques are used extensively by law enforcers • Number plate recognition for speed cameras/automated toll systems • Fingerprint recognition

  14. Examples: HCI • Try to make human computer interfaces more natural • Face recognition • Gesture recognition • Does anyone remember the user interface from “Minority Report”? • These tasks can be extremely difficult

More Related