Comprehensive Meaning Of Segmentation By ClusteringWritten by Eng.Mohamed S. El Kayyali
Segmentation as a word, means to classify objects that are exists in an image, it has many theories and methodologies, assume that we would like to recognize objects in an image, there are too many pixels to handle each individually, instead, we should like some form of compact, summary representation.
Although, superficially these different methods may seem some how complicated for any reader, in this article I will demonstrate meaning of clustering in segmentation.
One natural view of segmentation is that we are attempting to determine which components of data set naturally belong together. This is a problem known as clustering. We can cluster in two ways:
-Partitioning: here we have a large data set, and curve it up according to notion of association between items inside set. We would like to decompose it into pieces that are good according to our model. For example we can decompose an image into regions that have coherent color and texture.
-Grouping: in this part we have distinct data items, and we would like to collect sets of data items that make sense together.
The key here is to determine what representation is suitable for problem at hand, we need to know by what criteria a segmentation method should decide which pixels belong together and which do not.
Troubleshooting Your Dish Network ReceiverWritten by Nick Smith
It has happened to all of us. It’s fourth and ten with just 1:42 to go in second half – and of course your team is down. The weather outside is getting worse and worse. Suddenly, image on your TV looks eerily like snow falling outside your window. It is a race against game clock to get picture back on your TV before you have to resign and just look for score on evening news.
Remember, only on a rare occasion will you lose picture with Dish Network - when you do, more often than not, there is nothing wrong with your equipment or service. This article discusses some of easiest and fastest ways to troubleshoot your Dish Network receiver.
From High in Sky to Your Dish Network Receiver
Dish Network uploads programming to its satellites via gigantic transmission stations on earth. The digital image travels upward through atmosphere where it eventually finds satellites orbiting Earth miles above United States. Those satellites capture and resend digital signal in such a way that nearly everyone with a plain view of sky can receive it. The signal is collected by ubiquitous mini-dishes and sent through cables to your Dish Network receiver, which is set up to decode and convert digital signal to a viewable picture. That viewable picture is transferred to your brand-new, 56 inch widescreen plasma TV, where only moments ago you were watching second half of your favorite team’s football game.
The Game Plan
If you suddenly lose picture on your TV, problem could be in any one of six places – but before you panic, let me tell you you’re only going to have to check four of them.
The Dish – If something interferes with signal getting from satellite down to your dish picture is obviously going to suffer. If signal is completely blocked, your picture will disappear. Make sure that there is nothing between your dish and where your dish is pointing in sky. This could include: a tree branch, your motor home, your neighbor’s motor home, a build-up of snow, ice, or excessive water on dish, or anything else you could possibly imagine. Luckily, solution is simple. Get signal flowing freely back to your Dish Network receiver by removing obstruction. Of course, if obstruction is your neighbor’s prize winning oak tree, be judicious as you contemplate ways of removing it (i.e. talk to her about it and figure out a solution together). If it is ice or snow just wipe dish clean, and you’ll be back to your game before they even snap ball.