Introduction to Image Processing and Python: Pixel ...
Introduction to Image Processing and
Python: Pixel Representation
Pixel Representation
Steven L. Tanimoto
Intro. to Image Proc. & Python ? S. Tanimoto
Saturday, August 24, 13
Pixel Representation
1
Outline
? Representing pixels in PixelMath and
other Imaging Systems
? Binary Numbers
? Converting to/from decimal
? Bits and Bytes and how binary numbers
represent information
? Direct RGB color representation
? Indexed color representation
Intro. to Image Proc. & Python ? S. Tanimoto
Saturday, August 24, 13
Pixel Representation
2
Binary Numbers and Pixels
The binary number system (or base 2) uses one
binary digit (¡°bit¡±) for each power of 2 in some
range of powers, say 20 to 27.
Decimal
0
1
2
3
Binary
0
1
10
11
Intro. to Image Proc. & Python ? S. Tanimoto
Saturday, August 24, 13
Pixel Representation
3
Binary Numbers (continued)
Decimal
4
5
6
7
8
9
10
11
12
13
14
15
Intro. to Image Proc. & Python ? S. Tanimoto
Saturday, August 24, 13
Binary
100
101
110
111
1000
1001
1010
1011
1100
1101
1110
1111
Pixel Representation
4
Pixel Values in Binary
Decimal
0
1
100
127
128
254
255
Intro. to Image Proc. & Python ? S. Tanimoto
Saturday, August 24, 13
Binary
00000000
00000001
01100100
01111111
10000000
11111110
11111111
Pixel Representation
5
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