function?result=areasky（imagewidthheight）?%返回值為分界線所在行
i=0;
for?row=1:height
????i=i+1;%i等于height的值
????grayy（i）=0;
%???if?rem（row2）==0????%隔行計算水平投影
??????for?col=1:width
??????????grayy（i）=grayy（i）+double（image（rowcol））;
??????end
??????averal（i）=round（grayy（i）/width）;???????
%???else
%?????averal（i）=0;
%???end
????if?averal（i）<100???%陸天分界線灰度閾值設為100
????????result=i;??????%返回分界線所在行
????????break;
????end
end

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件??????61494??2005-05-17?17:15??邊道線檢測\1000_0.bmp

?????文件??????61494??2005-05-17?17:15??邊道線檢測\1000_1.bmp

?????文件??????61494??2005-05-17?17:15??邊道線檢測\1000_10.bmp

?????文件??????61494??2005-05-17?17:15??邊道線檢測\1000_100.bmp

?????文件??????61494??2005-05-17?17:15??邊道線檢測\1000_101.bmp

?????文件??????61494??2005-05-17?17:15??邊道線檢測\1000_102.bmp

?????文件??????61494??2005-05-17?17:15??邊道線檢測\1000_103.bmp

?????文件??????61494??2005-05-17?17:15??邊道線檢測\1000_104.bmp

?????文件??????61494??2005-05-17?17:15??邊道線檢測\1000_105.bmp

?????文件??????61494??2005-05-17?17:15??邊道線檢測\1000_106.bmp

?????文件??????61494??2005-05-17?17:15??邊道線檢測\1000_107.bmp

?????文件??????61494??2005-05-17?17:15??邊道線檢測\1000_108.bmp

?????文件??????61494??2005-05-17?17:15??邊道線檢測\1000_109.bmp

?????文件??????61494??2005-05-17?17:15??邊道線檢測\1000_11.bmp

?????文件??????61494??2005-05-17?17:15??邊道線檢測\1000_110.bmp

?????文件??????61494??2005-05-17?17:15??邊道線檢測\1000_111.bmp

?????文件??????61494??2005-05-17?17:15??邊道線檢測\1000_112.bmp

?????文件??????61494??2005-05-17?17:15??邊道線檢測\1000_113.bmp

?????文件??????61494??2005-05-17?17:15??邊道線檢測\1000_114.bmp

?????文件??????61494??2005-05-17?17:15??邊道線檢測\1000_115.bmp

?????文件??????61494??2005-05-17?17:15??邊道線檢測\1000_116.bmp

?????文件??????61494??2005-05-17?17:15??邊道線檢測\1000_117.bmp

?????文件??????61494??2005-05-17?17:15??邊道線檢測\1000_118.bmp

?????文件??????61494??2005-05-17?17:15??邊道線檢測\1000_119.bmp

?????文件??????61494??2005-05-17?17:15??邊道線檢測\1000_12.bmp

?????文件??????61494??2005-05-17?17:15??邊道線檢測\1000_120.bmp

?????文件??????61494??2005-05-17?17:15??邊道線檢測\1000_121.bmp

?????文件??????61494??2005-05-17?17:15??邊道線檢測\1000_122.bmp

?????文件??????61494??2005-05-17?17:15??邊道線檢測\1000_123.bmp

?????文件??????61494??2005-05-17?17:15??邊道線檢測\1000_124.bmp

............此處省略119個文件信息