Кодирование символов Кодирование графической информации

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    03-Jan-2016

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. 9 . . ?. ( N) - PowerPoint PPT Presentation

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  • 9

  • ? (N) (k), N (2k = N) , 0 2k - 1 ( )

  • ?, .txt , . , ( .fon , .ttf , .otf ), , . .

  • ASCII : 0 (00000000) 127 (01111111) 0 31 0 9 48 57 Z - 65 90 z - 97 122 ( , , .) ( )128 (10000000) 255 (11111111)

    ASCII (0127) (128255) ASCII

  • , Windows-1251 - WindowsKOI8-R - UnixCP-1251 - MacCyrillic - Apple

    - Windows-1251 KOI8-R .

  • Unicode_4. , : / Unicode? ? 8- ? UTF-8 UTF-16? ?

  • , , , , , . , . , . (, ) .

  • (. pixel =picture element , ) . , -

  • - 8- 16-

  • ?

  • - RGB (Red, Green, Blue)

  • RGB

  • RGB

  • , , RGB,

  • : RGB CMYK. RGB , , , , : (Red), (Green), (Blue). CMYK , .

  • RGB CMYK

  • ( ), ( ). :BMPGIFJPEGTIFFPNG

  • Graphics Interchange Format (GIF) , . , . , (, ) ( ) ( 256). Web- .Portable Network Graphic (PNG) , GIF. Web- .Joint Photographic Expert Group (JPEG) , ( JPEG) . , . . Web- .

  • () Bit MaP image (BMP) , Windows. , Paint. .Tagged Image File Format (TIFF) , . . . .

  • CMYK , . , , . , , .

  • CMYK

  • ?

  • (, , , ). . . , , , . . , , (, , , ) .

  • ,

  • ()

  • , ( ) . . 12801024 . .. 1280 * 1024 = 1310720 . 32 : 32 *1310720 = 41943040 = 5242880 = 5120 = 5 .

    * , . , , 6 , . , . , , . , 6 ( =64 , 63 , .., , )., . . *, .txt , . ? , ( .fon , .ttf , .otf ), , . . , , , -. ?... , , .!!! . , . - . * . , . , . 7- ASCII , 128 27 =128, 0 127: . . , 8- . ASCII = 8- . : 128 128 255. ASCII . ASCII , - .

    * , - *

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