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Кодирование графической информации. Орлова Елена Альбертовна учитель информатики и ИКТ ГОУ СОШ №451 Санкт-Петербург. Графическая информация может быть представлена в аналоговой и дискретной форме. живописное полотно. цифровая фотография.

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Кодирование графической информации

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.


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, , , .

dpi

(dot perinch ), .. (1 =2,54 .)


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, , .

( , ).

N I, , : N=2

I


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:

- ( ) . N=2 , , :

I

I

1

2=2

I = 1

2=2

-

1 .


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8

16

24

, .


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:

1. - 16 1010 . ?

4

: 16 = 2 ; 10*10*4 = 400

2. 256- 120 . ?

:

120 = 120*8 ; 265 = 2 (8 1 ).

120*8/8 = 120

8


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, .

1

, 2400 dpi

, 1200 dpi


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1 2 3 4 .. 800

2

3

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RGB ,

.


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Color :

Color= R + G +

, .

24 (8 ):

0 R 255, 0 G 255, 0 B 255


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RGB

RGB , .


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RGB , .


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CMYK

CMYK , , .


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MYK

CMYK .


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Color :

Color = + M + Y

:

0% 100%, 0% 100%, 0% Y 100%

, , . - . , bla.

CMYK.


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CMYK

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:

,

, 800600 32 .

:

800*600*5 = 2400000 : 8 : 1024 = 293

2. , 640480 , 32?

:

640*480*5*4 = 6144000 : 8 : 1024 = 750


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:

.., 9

1.1.1, 1.1.2, 1.1.3

1.1 1.7


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