Image processing, Computer Graphics

Image Processing

New digital technology has made this possible for the manipulation of multi- dimensional signals along with systems which range from easy digital circuits to advanced parallel computers. The objective of this manipulation can be divided into three categories:

1)   Image Processing image in -> image out

2)   Image Analysis image in -> measurements out

3)   Image Understanding image in -> high-level description out

We will focus upon the fundamental ideas of image processing. We can only create many introductory remarks regarding image analysis here, since to go into details would be beyond the scope of this section. Image understanding needs an approach which is different fundamentally from the theme of this section. Additionally, we will limit ourselves to two-dimensional or 2D image processing though; mainly the ideas and techniques which are to be illustrated can be extended simply to three or more dimensions.

We begin along with specific basic definitions. An image explained in the "true world" is considered to be a function of two real variables, for illustration, a(x,y) along with a as the amplitude for example: brightness, of the image at the actual coordinate position (x,y). An image might be considered to include sub-images occasionally referred to as areas-of-interest, ROIs or only regions. This idea reflects the information that images often contain collections of objects each of that can be the basis for an area. In a sophisticated image processing system this should be probable to apply exact image processing operations to selected regions. Therefore, one part of an image or region might be processed to suppress motion blur while the other part might be processed to enhance colour rendition.

The amplitudes of a specified image will mostly always be either true numbers or integer numbers. The latter is generally a result of a quantization process which converts a continuous range as between 0 and 100 percent to a discrete number of levels. In specific image-forming processes, conversely, the signal may engage photon counting that implies the amplitude that would be inherently quantized. In other image forming procedures, as magnetic resonance imaging, the direct physical measurement yields a complicated number in the form of a real phase and a real magnitude.

A digital image a[m,n] illustrated in a two dimensional discrete space is derived from an analog image a(x,y) in a two dimensional continuous space by a sampling process which is frequently referred to as digitization.

Now let us discuss details of digitization. The two dimensional continuous image a(x,y) is divided into N rows and M columns. A row and a column, both intersections are termed a pixel. The value allocated to the integer coordinates [m,n] along  with {m=0,1,2,...,M -1} and {n=0,1,2,...,N -1} is a[m,n]. Actually, in most cases a(x,y): that we might think to be the physical signal that impinges upon the face of a two dimensional sensor, is in fact a function of many variables comprising depth (z), colour (l), and time (t). The consequence of digitization is demonstrations in following figure.

 

                                   2295_Image Processing.png

Posted Date: 3/15/2013 3:25:54 AM | Location : United States







Related Discussions:- Image processing, Assignment Help, Ask Question on Image processing, Get Answer, Expert's Help, Image processing Discussions

Write discussion on Image processing
Your posts are moderated
Related Questions
Single Point Perspective Transformation - Viewing Transformations In order to derive the particular point perspective transformations beside the x and y-axes, we construct fi

Question 1: (a) The studio provides a perfect environment for various types of video production where precise control is necessary. Discuss. (b) Studio lighting is an import

What is the maximum number of objects such can be handled via the depth/z- buffer algorithm? Solution : In z-buffer algorithm, an arbitrary number of objects can be handled sin

LCD - Liquid Crystal Display A liquid crystal display consists of two glass plates each containing a light polarizer. One glass plate contains vertical polarizer and the ot

Sub Classes of Orthographic Projection There are three ordinary sub-classes of Orthographic (axonometric) projections as: 1) Isometric: The direction of projection makes

Explain Bresenham s circle drawing algorithm,  OR   Explain midpoint circle algorithm for scan converting a circle. Midpoint Circle Algorithm   1. Input radius r and circle

Liang Barsky line clipping algorithm : The algorithm uses parametric form of the line segment.  Four inequalities are created using the parametric form of the line segments.  Th

Definition of Computer Animation A time dependence phenomenon for imparting visual modifies in any scene as per to any time sequence, the visual modifies could be incorporated

Question 1 Briefly explain the twelve principles of animation Question 2 Explain the methods to set-up pre and post-infinity curves Question 3 What is a model sheet? Exp