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第五章 图像校正与增强 PowerPoint PPT Presentation


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辐射校正. 图像校正. 几何校正. 第五章 图像校正与增强. 原因: 辐射校正 由于遥感检测系统、大气散射和吸收等原因引起的图像模糊失真、分辩率和对比度下降等辐射失真; 几何校正 是由于搭载传感器的遥感平台飞行资态变化、地球自传、地球曲率等原因引起的图像几何益畸变。. 5.1 数字图像基础知识 一、数字图像和图像数字化 (一)数字图像的概念 早期的遥感技术通过摄影成像方法得到的像片称之为 光学图像。 能在计算机里存储、运算、显示和输出的图像称为 数字图像。

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第五章 图像校正与增强

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5.1


O

x

y

(x,y)

f(x,y)x,y)

,x,y,f(x,y)


1

2

3

4

5

6

O

1

x

2

3

Pixel

4

y

f(x,y)2nn1478f(x,y)



1

2264128256

SPOT,MSS,TM,ETM


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.

2.

3.

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5.2

gg,

g=g/cos

12


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a

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bLaiRi

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LAia


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TM1

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a1,b1

TM1

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5.3

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2



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2XbYbXaYa

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2

4


3

16


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11/5

2

3


5.4




TM62100-256


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