003+11-08-11+-+Chapter+6 - Chapter 6 Graphics, Video, and...

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Slide 1 Chapter 6 Graphics, Video, and Sound
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Slide 2 Painting: Bitmapped Graphics Painting software: Paints pixels on the screen with a pointing device Pointer movements are translated into lines and patterns on the screen Stores an image at 300 DPI (dots per inch) or higher
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Slide 3 Graphics Terminology Pixels : tiny dots of white, black, or color that make up images on the screen The palette of painting tools mimics real-world painting tools Bitmapped graphics (or raster graphics): pictures that show how the pixels are mapped on the screen Color depth : the number of bits devoted to each pixel Resolution: the density of the pixels
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Slide 4 Image Processing: Photographic Editing by Computer Allows the user to manipulate photographs and other high- resolution images with tools such as Adobe Photoshop Far more powerful than traditional photo-retouching techniques Can distort and combine photos Can create fabricated images that show little evidence of tampering
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Slide 5
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Slide 6
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Slide 7
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Slide 8
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Slide 9
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Slide 10
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Slide 11
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Slide 12
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Slide 13
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Slide 14
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Slide 15
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The Uncanny Valley: Realism vs. Familiarity Slide 16
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Homer vs. Uncanny Homer Slide 17
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Slide 18 Bit-mapped painting (pixels) gives you these advantages: More control over textures, shading and fine detail Appropriate for screen displays, simulating natural paint media and embellishing photographs (All digital photos are bit-mapped)
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Slide 19 Object-oriented drawing gives you these advantages: Better for creating printed graphs, charts, and illustrations Lines are cleaner and shapes are smoother Can be resized repeatedly without pixelization
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Slide 20 Some integrated programs contain both drawing (object oriented) and painting (bitmapped) modules Allows you to choose the right tool for each job Some programs merge features of both in a single application Blurring the distinction between types Offers new possibilities for amateur and professional illustrators
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Slide 21 Concept: Data Compression Shrinking a file, usually for easier storage or faster transmission over a network. Used for photos, video, audio, text, programs – almost anything stored on a computer. Removes redundant information: repeated text, sounds, images, etc. Removes unnecessary information: sounds beyond the human hearing range, images too detailed to see at a given resolution Lossy compression: Some information is lost permanently. Lossless compression: All information can be restored on decompression.
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Slide 22 Graphics File Formats MOST COMMON: .GIF – max 255 colors per frame, supports animation, lossless compression .JPG or .JPEG – mostly used for photos, offers continuous tone image, lossy compression .PNG – Portable Network Graphic (lossless) FREQUENTLY FRUSTRATING:
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This note was uploaded on 11/25/2011 for the course CMPE 03 taught by Professor Geraldmoulds during the Fall '11 term at University of California, Santa Cruz.

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003+11-08-11+-+Chapter+6 - Chapter 6 Graphics, Video, and...

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