Software requirements for animation in addition to

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Unformatted text preview: illustrating concepts that involve movement. For example, in the multimedia application meant for educating small children (our previous example), an animation clip will be very effective in illustrating the difference in movement of a horse during a gallop versus a walk. Without animation, it will be very difficult to explain such concepts using only still images and/or text. Similarly, in a multimedia application that contains training materials for teaching swimming, the proper way to swing hands for swimming can be more effectively illustrated with an animation as compared to images and/or text description. Animation is often confused with video (described later in this chapter) may be because both deal with the display of a sequence of images (frames) to generate an effect of motion. However, animation is commonly used in those instances where videography is not possible or animation can better illustrate the concept than video. For example, collision between two stars or movement of planets around sun cannot be videographed and can be best illustrated with the help of an animation clip. Similarly, flow of blood in our arteries and veins and pumping of blood by our heart can be best illustrated with the help of an animation clip. Animation is also very commonly used in advertisements, cartoon films, video games, and virtual reality applications. Virtual reality is a relatively new computer technology using which the user can put on a pair of goggles and a glove and tour a three-dimensional world that exists only in the computer, but appears realistic to the user. Animation deals with displaying a sequence of images at a reasonable speed to create an impression of movement. For a jerk-free full motion animation, 25 to 30 frames have to be displayed per second. We saw in the previous section that a 640- by-480 image with 24-b color requires 7.4 Mbits of storage. Therefore, a one second of animation will require 7.4 x 25 = 185 Mbits =; 23 Mbytes (185 -=- 8) of storage. In general, an animation clip lasts for several seco...
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