Images - systems research group, Computer Graphics

The image you have been given for contour extraction is shown in Figure 1. The method for constructing the search space is shown in Figure 2. It is generated from two initial discrete contours (shown in red). (The example shown here has N = 4 points on each contour for clarity, but the example you are given has many more points.) The search space is formed by joining the corresponding points on the two red contours with lines (shown in green). These green lines are then subdivided equally into M points to provide a discrete M  N search space, of which there are MN possible contours. The aim of the algorithm is to nd the contour which has points of highest intensity along it and is smooth. The constraints are that each line must pass through one green point per line and it cannot move back on itself. An example of an optimal contour in this case is shown in brown and an example of a non-optimal contour is shown in yellow. The problem with such a technique is that the large size of the search space demands a high computational overhead. However, the local connectivity of the contour energy function can be exploited, reducing the computation from exponential to polynomial time. The method of Dynamic Programming (Bellman, 1957) will be employed, which is based around the principle of optimality. The principle states (Sonka et al., 1993): Whatever the path to a node X, there exists an optimal path between X and the end point. In other words if the optimal path (start point to end point) goes through X then both its parts start point to X and X to end are also optimal.

Posted Date: 3/15/2013 1:43:29 AM | Location : United States







Related Discussions:- Images - systems research group, Assignment Help, Ask Question on Images - systems research group, Get Answer, Expert's Help, Images - systems research group Discussions

Write discussion on Images - systems research group
Your posts are moderated
Related Questions
Display Devices - Graphics Hardware Since the importance of output and input devices has been discussed over, so let us now focus our discussion particularly on display dev

why do video game characters look better today?

Overview of Hardware Primitives With the advancement of computer technology, computer graphics has become a practical tool used in real life applications in diverse areas such

Reflection and Types of Reflection Reflection and its types:   Reflection: this is the phenomenon of bouncing back of light; such phenomenon obeys laws of Reflec

Sequencing of Animation Design Previously we have discussed many things regarding the traditional and current trends of computer created animation although now it is time to pr

Specified p 0 (1, 1): p 1 (2, 3); p 2 (4, 3); p 3 (3, 1) as vertices of Bezier curve find out 3 points on Bezier curve? Solution : We consider Cubic Bezier curve as: P (

PIXEL PAINT: The pixel paint file format permits a document to be opened in the pixel paint and pixel paint professional graphics application. Such format permits you to identify

xy-Shear about the Origin - 2-d and 3-d transformations Suppose an object point P(x,y) be moved to P'(x',y') as a outcome of shear transformation in both x- and y-directions a

help me discuss about flat panel with respect to emissive and non emissive display

Cohen Sutherland Line Clippings Algorithm The clipping problem is identified by dividing the region surrounding the window area into four segments Up as U, Down as D, Left as