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NETWORK BASICS

Network A system of interconnected computers and computerized peripherals such as printers is called computer network. This interconnection among computers facilitates information sharing among them. Computers may connect to each other by either wired or wireless media. A computer network consists of a collection of computers, printers and other equipment that is connected together so that they can communicate with each other.  


Network application
A Network application is any application running on one host and provides a communication to another application running on a different host, the application may use an existing application layer protocols such as: HTTP(e.g. the Browser and web server), SMTP(e.g. the email-client). And may be the application does not use any existing protocols and depends on the socket programming to communicate to another application. So the web application is a type of the network applications. 
There are lots of advantages from build up a network, but the th…

Creating animations using image ready

WHAT IS ANIMATIONA simulation of movement created by displaying a series of, or frames. Cartoons on television is one example of animation. Animation on computers is one of the chief ingredients of multimedia presentations. 

  • Now we will learn how to create animations in Adobe Photoshop using image ready: 
  • Lets open two images in Photoshop. The two images we'll be working with are shown here. The brown Bat has already had the background removed. 
  • This brown Bat is a little bit shy, so for our animation we want to have him hiding behind the Moon shown in the upper right corner of the background image. In order to do this, we first need to isolate the Moon and copy it to another layer. We'll be using channels to do this. 
  • Select the background image and go to the channels palette. If your channels palette is not visible, go to Window > Channels. Look at each of the channels and choose the one that has the most contrast between the Moon and the surrounding area. In this case, it's the green channel. Drag the green channel to the new channel icon in the channel palette 
  • A duplicate of the green channel is added to the channels palette, it is named ‘Green copy’ 
  • Click on ‘Green copy’ in the channels palette to select it. 
  • Go to Image > Adjustments > Levels
  • Move the sliders in the levels dialog until the outer edges of the moon become mostly white and the surrounding area is mostly black. 
  • Select the paintbrush tool and use black to paint out the non-moon white areas in the ‘Green copy’ channel as shown in the image below.  
  • Next click the RGB thumbnail at the top of the channels palette to view the color image. Then switch over to the layers palette 
  • Go to Select > Load Selection. The dialog shown below will appear where you can choose Green copy from the channel menu. 
  • After loading the selection, you'll see a marquee surrounding the selected area in your image. 
  • Go to Layer menu > New > Layer via Copy. The Moon will appear on a new layer in the layers palette. 


  • Select the  move tool. Click on the Bat.png image and drag and drop it onto the background image. 
  •  It will be placed into a new layer above all the other layers. Since we want to have this brown bat peeking out from behind the moon, we need to move it down one layer. Click on the layer and drag it down between the background and the moon as shown in the left image. 
  • Use the keyboard shortcut Ctrl-T to transform the layer. Flip, rotate, and move the bat into place behind the moon. 
  • Use the keyboard shortcut Ctrl-T to transform the layer. Move the Brown Bat behind the Moon.  
  • At this point, we need to save our file so we can switch to Image Ready to complete the animation. 
  • After saving your file, click the last button on the Photoshop toolbar to launch Image Ready. 
  • With the image open in Image Ready, display the animation palette by going to Window > Animation. The animation palette will appear with only one frame in the file. 
  • Click on Frame one to select it, then choose new frame from the animation palette menu 
  • Select the move tool and move the Brown Bat into position so it appears to be coming behind the Moon. 
  • From the animation palette menu, choose Tween. In the Tween dialog, choose All Layers, Position, Tween with Previous Frame, and add 3 frames. 
  • Tweening generates the intermediate frames for our animation. As you can see, the three new frames are added to the animation palette between the first and last frame. 
  • Notice the numbers displayed under each frame in the animation palette? These numbers indicate the time between frames, or the frame display rate. To change the timing for all frames at once, click on the first frame, then hold the shift key and click on the last frame.  
  • Click the tiny arrow and then choose a new rate from the menu. I used 0.2 seconds for my animation. You can also set a different rate for each frame by selecting only a single frame. 
  • To play animation just press Play button. 
  • To save it, go back to Photoshop, by clicking this icon  
  • Click file and save for web 
  • Make sure the file format is set to GIF 
  • Then click Save and choose a location to save it. 
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