Fundamentals Of Multimedia Isbn 0130618721-Books Pdf

Fundamentals of Multimedia ISBN 0130618721
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Full file at https fratstock eu,1 Introduction to Multimedia 1. 2 Multimedia Authoring and Tools 3,3 Graphics and Image Data Representations 11. 4 Color in Image and Video 15,5 Fundamental Concepts in Video 34. 6 Basics of Digital Audio 37,7 Lossless Compression Algorithms 44. 8 Lossy Compression Algorithms 52,9 Image Compression Standards 59.
10 Basic Video Compression Techniques 64,11 MPEG Video Coding I MPEG 1 and 2 68. 12 MPEG Video Coding II MPEG 4 7 and Beyond 74,13 Basic Audio Compression Techniques 78. 14 MPEG Audio Compression 82,15 Computer and Multimedia Networks 88. 16 Multimedia Network Communications and Applications 92. 17 Wireless Networks 98, 18 Content Based Retrieval in Digital Libraries 102. Full file at https fratstock eu,Introduction to Multimedia.
1 Identify three novel applications of the Internet or multimedia applications Discuss why you think. these are novel,WML Wireless markup Language, Mobile games massive multiplayer online role playing game Mmorpg. Multisensory data capture,Capture of context, Represent and adjust recollections in memory over time. Fictive Art in new media beyond RPGs in the use of narrative and fictions to create made up. worlds imaginary situations and odd situations an example is The Museum of Jurassic Tech. Bridging the semantic gap problem in automatic content annotation systems the gulf between. the semantics that users expect and the low level features content descriptions that systems. actually use one solution is an approach called computational media aesthetics We define. this approach as the algorithmic study of a variety of image space and aural elements em. ployed in media based on the media elements usage patterns in production and the associated. computational analysis of the principles that have emerged while clarifying intensifying and. interpreting some event for the audience IEEE Multimedia Magazine Volume 10 Issue 2. Year April June 2003, 2 Briefly explain in your own words Memex and its role regarding hypertext Could we carry out. the Memex task today How do you use Memex ideas in your own work. Memex was a theoretical system explicated by Vanevar Bush in a famous 1945 essay His main. ideas involved using associative memory as an aid for organizing a weler of material He even. adumbrated the concept of links, 3 Your task is to think about the transmission of smell over the Internet Suppose we have a smell. sensor at one location and wish to transmit the Aroma Vector say to a receiver to reproduce the. same sensation You are asked to design such a system List three key issues to consider and two. applications of such a delivery system Hint Think about medical applications. Full file at https fratstock eu,Chapter 1 Introduction to Multimedia.
October 6 2000 DigiScents Inc the pioneer of digital scent technology received the Best. New Technology award for its iSmell TM device at the Best of RetailVision Awards at the. Walt Disney World Dolphin Hotel in Lake Buena Vista Fla Retailers such as BestBuy Ra. dioShack CompUSA and other industry giants voted on the vendor awards. DigiScents The company would send you a dispenser about the size of a computer speaker. You d plug it into your PC It would be filled with chemicals that when mixed could recreate. most any smell Tiny bits of data would come in over the Net to tell your dispenser what smell. to make There would be a portal where you could find scents DigiScents calls it and at first I. thought they were joking a Snortal, 4 Tracking objects or people can be done by both sight and sound While vision systems are precise. they are relatively expensive on the other hand a pair of microphones can detect a person s bearing. inaccurately but cheaply Sensor fusion of sound and vision is thus useful Surf the web to find out. who is developing tools for video conferencing using this kind of multimedia idea. Distributed Meetings A Meeting Capture and Broadcasting System Ross Cutler Yong Rui. Anoop Gupta JJ Cadiz Ivan Tashev Li wei He Alex Colburn Zhengyou Zhang Zicheng Liu. Steve Silverberg Microsoft Research ACM Multimedia 2002. http research microsoft com research coet V Kitchen chi2001 paper pdf. 5 Non photorealistic graphics means computer graphics that do well enough without attempting to make. images that look like camera images An example is conferencing let s look at this cutting edge. application again For example if we track lip movements we can generate the right animation. to fit our face If we don t much like our own face we can substitute another one facial feature. modeling can map correct lip movements onto another model See if you can find out who is carrying. out research on generating avatars to represent conference participants bodies. See anthropic co uk, 6 Watermarking is a means of embedding a hidden message in data This could have important legal. implications Is this image copied Is this image doctored Who took it Where Think of mes. sages that could be sensed while capturing an image and secretly embedded in the image so as to. answer these questions A similar question derives from the use of cell phones What could we use. to determine who is putting this phone to use and where and when This could eliminate the need. for passwords, Embed retinal scan plus date time plus GPS data sense fingerprint. Full file at https fratstock eu,Multimedia Authoring and Tools. 1 What extra information is multimedia good at conveying. a What can spoken text convey that written text cannot. Speed rhythm pitch pauses etc,Emotion feeling attitude.
b When might written text be better than spoken text. Random access user controlled pace of access i e reading vs listening. Visual aspects of presentation headings indents fonts etc can convey information. For example the following two pieces of text may sound the same when spoken. I said quickly come here,I said quickly come here, 2 Find and learn 3D Studio Max in your local lab software Read the online tutorials to see this soft. ware s approach to a 3D modeling technique Learn texture mapping and animation using this product. Make a 3D model after carrying out these steps, 3 Design an interactive web page using Dreamweaver HTML 4 provides layer functionality as in. Adobe Photoshop Each layer represents an HTML object such as text an image or a simple HTML. page In Dreamweaver each layer has a marker associated with it Therefore highlighting the layer. marker selects the entire layer to which you can apply any desired effect As in Flash you can. add buttons and behaviors for navigation and control You can create animations using the Timeline. 4 In regard to automatic authoring, a What would you suppose is meant by the term active images. Simple approach Parts of the image are clickable, More complex Parts of the image have knowledge about themselves. b What are the problems associated with moving text based techniques to the realm of image. based automatic authoring,Full file at https fratstock eu.
Chapter 2 Multimedia Authoring and Tools, Automatic layout is well established as is capture of low level structures such as images. and video However amalgamating these into higher level representations is not well un. derstood nor is automatically forming and linking appropriate level anchors and links. c What is the single most important problem associated with automatic authoring using legacy. already written text documents, Overwhelming number of nodes created and how to manage and maintain these. 5 Suppose we wish to create a simple animation as in Fig 2 30 Note that this image is exactly. Fig 2 30 Sprite progressively taking up more space. what the animation looks like at some time not a figurative representation of the process of moving. the fish the fish is repeated as it moves State what we need to carry out this objective and give a. simple pseudocode solution for the problem Assume we already have a list of x y coordinates for. the fish path that we have available a procedure for centering images on path positions and that the. movement takes place on top of a video, We have a fish mask as in Figure ref FIG MASKANDSPRITE a and. also a fish sprite as in Figure ref FIG MASKANDSPRITE b. Fish positions have centers posn t x posn t y,currentmask an all white image. currentsprite an all black image,for t 1 to maxtime.
Make a mask fishmask with the fish mask black area. centered on position posn t x posn t y, and a sprite fishsprite with the colored area also moved. to posn t x posn t y,Then expand the mask, currentmask currentmask AND fishmask enlarges mask. currentsprite currentsprite OR fishsprite enlarges sprite. display current frame of video with fish path on top. Full file at https fratstock eu 5, currentframe frame t AND currentmask OR currentsprite. Fig 2 30 answer Mask and Sprite, 6 For the slide transition in Fig 2 11 explain how we arrive at the formula for x in the unmoving right. if x xmax t tmax then we are in the right hand video The value of x is to the right of xT. and the value in the unmoving right hand video is that value of x reduced by xT so that we are. in units with respect to the left of the right hand video frame That is in the right hand video. frame we are at position x xt which is x xmax t tmax. 7 Suppose we wish to create a video transition such that the second video appears under the first video. through an opening circle like a camera iris opening as in Figure 2 31 Write a formula to use the. correct pixels from the two videos to achieve this special effect Just write your answer for the red. Fig 2 31 Iris wipe a Iris is opening b At a later moment. Full file at https fratstock eu,Chapter 2 Multimedia Authoring and Tools.
radius of transition r T 0 at time t 0,r T r max sqrt x max 2 y max 2 2 at time t t max. r T r max t t max,r sqrt x x max 2 2 y y max 2 2,If r t t max r max. R x y t R1 x y t,R x y t R0 x y t, 8 Now suppose we wish to create a video transition such that the second video appears under the first. video through a moving radius like a clock hand as in Figure 2 32 Write a formula to use the. correct pixels from the two videos to achieve this special effect for the red channel. Fig 2 32 Clock wipe a Clock hand is sweeping out b At a later moment. Full file at https fratstock eu 7,angle of transition a T 0 at time t 0. a T a max 360 at time t t max,a T a max t t max,a atan y y max 2 x x max 2.
Since y in defn of angle increases from bottom not from top. like rows Watch for correct quadrant though use 2 arg atan. If a t t max a max,R x y t R1 x y t,R x y t R0 x y t. 9 Suppose you wish to create a wavy effect as in Figure 2 33 This effect comes from replacing the im. age x value by an x value offset by a small amount Suppose the image size is 160 rows 120 columns. a Using float arithmetic add a sine component to the x value of the pixel such that the pixel takes. on an RGB value equal to that of a different pixel in the original image Make the maximum. shift in x equal to 16 pixels,R R x sin y 120 16 y and similarly for G B. b In Premiere and other packages only integer arithmetic is provided Functions such as sin are. redefined so as to take an int argument and return an int The argument to the sin function. must be in 0 1 024 and the value of sin is in 512 512 sin 0 returns 0 sin 256. returns 512 sin 512 returns 0 sin 768 returns 512 and sin 1 024 returns 0. Rewrite your expression in part a using integer arithmetic. Full file at https fratstock eu,Chapter 2 Multimedia Authoring and Tools. Fig 2 33 Filter applied to video,R R x sin y 1024 120 32 y and similarly. In Premiere src x sin y 1024 120 32 y p, Why y in 0 119 y 1024 120 in 0 1023 the resulting sin.
is in 512 512 and dividing by 32 puts the offset range into. c How could you change your answer to make the waving time dependent. R R x t sin y 1024 120 32 tmax y,In Premiere src x t sin y 1024 120 32 tmax y p. Note the order else have t tmax 0 or 1 only, 10 How would you create the image in Figure 2 6 Write a small program to make such an image Hint. Place R G and B at the corners of an equilateral triangle inside the circle It s best to go over all. columns and rows in the output image rather than simply going around the disk and trying to map. results back to x y pixel positions,Matlab script,im ones SIZE SIZE 3. Place R at 0 1,Full file at https fratstock eu 9,Place G at 120 degrees. Place B at 240 degrees, The outside perimeter goes from R to G as we go from.
And from B to R as we go from 240 to 360,At a position where the Outside Perimeter value. is out at radius r the color is,1 r 1 1 1 r out,Go over all pixels. for j 1 SIZE,for i 1 SIZE,x j SIZE 2,y i SIZE 2,r sqrt x x y y. if r SIZE 2,ang 180 pi atan2 y x,ang 360 ang,if ang 120 between R and G. out 120 ang 120 ang 120 0,elseif ang 240 between G and B.
out 0 240 ang 120 ang 120 120,else between B and R. out ang 240 120 0 360 ang 120,end if ang, and could make the in between bands broader by not using. linear interpolation if wished,im i j SIZE 2 r SIZE 2 1 1 1 r SIZE 2 out. and normalize the color to bright,temp max im i j,im i j im i j temp takes one channel to 1 0. imwrite im colorwheel256 bmp, 11 As a longer exercise for learning existing software for manipulating images video and music mak.
Fundamentals of Multimedia ISBN 0130618721 Ze Nian Li and Mark S Drew School of Computing Science Simon Fraser University Exercise Solutions c Prentice Hall Inc 2003 Full file at https fratstock eu Contents 1 Introduction to Multimedia 1 2 Multimedia Authoring and Tools 3 3 Graphics and Image Data Representations 11 4 Color in Image and Video 15 5 Fundamental Concepts in Video 34 6

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