1 / 9

IT523 Digital Image Processing

IT523 Digital Image Processing. Prof. Asim Banerjee Lecture 2 2 nd August 2007. What is an Image ?. Image is a two dimensional light-intensity function, f(x,y), where the value of f at a spatial location (x,y) is the intensity of the image at that point.

msing
Download Presentation

IT523 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. IT523 Digital Image Processing Prof. Asim Banerjee Lecture 2 2nd August 2007

  2. What is an Image? • Image is a two dimensional light-intensity function, f(x,y), where the value of f at a spatial location (x,y) is the intensity of the image at that point. NOTE: The function f(x,y) can be a measure of the reflected light (photography), X-ray attenuation (X-Rays) or any other physical parameter. IT523 - Digital Image Processing

  3. What is a DigitalImage? • Digital Image is obtained by sampling and quantizing the function f(x,y). • Thus a digital image is discrete in time and quantized in amplitude. Question:- What are the issues that one has to take care of in converting an image to its digital form? IT523 - Digital Image Processing

  4. What is Digital Image Processing? • Digital Image Processing (DIP) involves processing the digital image (using the computer) to extract meaningful information from the images. NOTE: The meaningful information is dependent on the application. IT523 - Digital Image Processing

  5. Why is DIP Important? • Importance of Digital Image Processing stems from two principal application areas • Improvement of pictorial information for human interpretation • Processing of scene data for autonomous machine perception IT523 - Digital Image Processing

  6. 1. Improvement … Human Interpretation • Involves selection of printing procedures and distribution of brightness levels • Improvements on processing methods for transmitted digital pictures • Application areas include • Archeology • Astronomy • Biology • Industrial Applications • Law enforcements • Medical Imaging • Space program etc. IT523 - Digital Image Processing

  7. 2. Processing…Machine Perception • Focuses on procedures for extracting from an image information in a form suitable for computer processing NOTE : Often this information bears little resemblance to visual features that human beings use in interpreting the content of an image. • Application areas include: • Automatic Optical Character Recognition • Machine vision for product assembly and inspection • Military recognizance • Automatic fingerprint matching etc. IT523 - Digital Image Processing

  8. Representation and Description Segmentation Preprocessing Recognition and Interpretation O/P Knowledge Base Outside world Image Acquisition The Digital Image Processing System The DIP system takes inputs from the outside world and produces desirable (application dependent) outputs. IT523 - Digital Image Processing

  9. Questions? IT523 - Digital Image Processing

More Related