clc;
close?all;

pic=imread（‘pic.jpg‘）;
%?figure
%?imshow（pic1）

pic_g=rgb2gray（pic）;
imwrite（pic_g‘pic_g.jpg‘）
figure
imshow（pic_g）
%?[pic_g_sobelthresh]=edge（pic_g‘sobel‘）;
thresh=0.02;
pic_g_sobel=edge（pic_g‘sobel‘thresh）;
figure
imshow（pic_g_sobel）
imwrite（pic_g_sobel‘pic_g_sobel.jpg‘）;

pic_t=pic_g;

for?bei=1:5?%共四層金字塔
[n~]=size（pic_t）;%the?original?size
m=floor（n/2）;
pic_temp=zeros（mm）;
for?i=1:m
????for?j=1:m???
????pic_temp（ij）=pic_t（i*2j*2）;
????end
end
imwrite（uint8（pic_temp）[‘pic_g_‘num2str（2^bei）‘.jpg‘]）;
figure;
imshow（uint8（pic_temp））;
pic_temp_sobel=edge（pic_temp‘sobel‘thresh）;
figure;
imshow（pic_temp_sobel）;
imwrite（pic_temp_sobel[‘pic_g_‘num2str（2^bei）‘_sobel.jpg‘]）;
pic_t=pic_temp;
end

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2011-03-19?23:32??金字塔_sobel邊緣\
?????文件???????21544??2011-03-19?18:02??金字塔_sobel邊緣\pic.jpg
?????文件????????2788??2011-03-21?16:12??金字塔_sobel邊緣\pic_g.jpg
?????文件?????????381??2011-03-21?16:12??金字塔_sobel邊緣\pic_g_16.jpg
?????文件?????????402??2011-03-21?16:12??金字塔_sobel邊緣\pic_g_16_sobel.jpg
?????文件????????1301??2011-03-21?16:12??金字塔_sobel邊緣\pic_g_2.jpg
?????文件????????3503??2011-03-21?16:12??金字塔_sobel邊緣\pic_g_2_sobel.jpg
?????文件?????????357??2011-03-21?16:12??金字塔_sobel邊緣\pic_g_32.jpg
?????文件?????????371??2011-03-21?16:12??金字塔_sobel邊緣\pic_g_32_sobel.jpg
?????文件?????????750??2011-03-21?16:12??金字塔_sobel邊緣\pic_g_4.jpg
?????文件????????1324??2011-03-21?16:12??金字塔_sobel邊緣\pic_g_4_sobel.jpg
?????文件?????????510??2011-03-21?16:12??金字塔_sobel邊緣\pic_g_8.jpg
?????文件?????????656??2011-03-21?16:12??金字塔_sobel邊緣\pic_g_8_sobel.jpg
?????文件????????7202??2011-03-21?16:12??金字塔_sobel邊緣\pic_g_sobel.jpg
?????文件?????????778??2011-03-21?16:12??金字塔_sobel邊緣\pyramid.m
?????文件?????????400??2011-03-21?16:16??金字塔_sobel邊緣\說明.txt
?????目錄???????????0??2011-03-21?15:58??高斯－ｓｏｂｅｌ\
?????文件?????????873??2011-03-21?15:53??高斯－ｓｏｂｅｌ\gaussian_sobel.asv
?????文件?????????864??2011-03-21?15:58??高斯－ｓｏｂｅｌ\gaussian_sobel.m
?????文件???????21544??2011-03-19?18:02??高斯－ｓｏｂｅｌ\pic.jpg
?????文件????????2788??2011-03-21?15:58??高斯－ｓｏｂｅｌ\pic_g.jpg
?????文件????????2275??2011-03-21?15:58??高斯－ｓｏｂｅｌ\pic_g_sigma1.jpg
?????文件????????7114??2011-03-21?15:58??高斯－ｓｏｂｅｌ\pic_g_sigma1_sobel.jpg
?????文件????????1848??2011-03-21?15:58??高斯－ｓｏｂｅｌ\pic_g_sigma3.jpg
?????文件????????5674??2011-03-21?15:58??高斯－ｓｏｂｅｌ\pic_g_sigma3_sobel.jpg
?????文件????????1583??2011-03-21?15:58??高斯－ｓｏｂｅｌ\pic_g_sigma5.jpg
?????文件????????3644??2011-03-21?15:58??高斯－ｓｏｂｅｌ\pic_g_sigma5_sobel.jpg
?????文件????????1335??2011-03-21?15:58??高斯－ｓｏｂｅｌ\pic_g_sigma7.jpg
?????文件????????2339??2011-03-21?15:58??高斯－ｓｏｂｅｌ\pic_g_sigma7_sobel.jpg
?????文件????????8891??2011-03-21?15:58??高斯－ｓｏｂｅｌ\pic_g_sobel.jpg
?????文件?????????394??2011-03-21?16:17??高斯－ｓｏｂｅｌ\說明.txt
............此處省略0個文件信息