Page 252 - Digital Analysis of Remotely Sensed Imagery

Amalgamated Frequency 3 7 9 8 6 3 3 6 9 2

Nearest DN in the Output 0 0 0 0 2 4 7 8 9 9 10 10 12 14 15 15

Equalized Cumulative Frequency 6.25 (1/16) 12.50 (2/16) 18.75 (3/16) 25.00 (4/16) 31.25 (5/16) 37.50 (6/16) 43.75 (7/16) 50.00 (8/16) 56.25 (9/16) 62.50 (10/16) 68.75 (11/16) 75.00 (12/16) 81.25 (13/16) 87.50 (14/16) 93.75 (15/16) 100.00 (16/16)

Cumulative Frequency, % 0.00 0.00 1.79 5.36 17.86 33.93 48.21 58.93 62.50 64.29 66.07 69.64 80.36 96.43 98.21 100.00 An Example of Histogram Equalization for a 4-Bit Image

Cumulative Frequency 0 0 1 3 10 19 27 33 35 36 37 39 45 54 55 56

Absolute Frequency 0 0 1 2 7 9 8 6 2 1 1 2 6 9 1 1

DN 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 TABLE 6.1

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