%2.2?Scale
clear;clc;close?all;
figure;

imgMat=im2double（imread（‘45.png‘））;
subplot（231）;
imshow（imgMat）;
title（‘Original?picture‘）
%Down-scale?to?192?x?128?
imgMat11=scale（imgMat128192）;
subplot（232）;
imshow（imgMat11）;
title（‘192?x?128‘）
%Down-scale?to?96?x?64
imgMat12=scale（imgMat6496）;
subplot（233）;
imshow（imgMat12）;
title（‘96?x?64‘）
%Down-scale?to?48?x?32
imgMat13=scale（imgMat3348）;
subplot（234）;
imshow（imgMat13）;
title（‘48?x?32‘）
%Down-scale?to?24?x?16
imgMat14=scale（imgMat1624）;
subplot（235）;
imshow（imgMat14）;
title（‘24?x?16‘）
%Down-scale?to?12?x?8
imgMat15=scale（imgMat812）;
subplot（236）;
imshow（imgMat15）;
title（‘12?x?8‘）
%Down-scale?to?300?x?200
imgMat16=scale（imgMat200300）;
figure;
imshow（imgMat16）;
title（‘300?x?200‘）
%Up-scale?to?450?x?300
imgMat17=scale（imgMat300450）;
figure;
imshow（imgMat17）;
title（‘450?x?300‘）
%scale?to?500?x?200
imgMat18=scale（imgMat200500）;
figure;
imshow（imgMat18）;
title（‘500?x?200‘）

%2.3
figure;
imgMat=imread（‘45.png‘）;
imgMat16=quantize（imgMat128）;?%Reduce?gray?level??to?128
subplot（231）;
imshow（imgMat16）
title（‘level-128‘）
imgMat7=quantize（imgMat32）;?%Reduce?gray?level??to?32
subplot（232）;
imshow（imgMat7）
title（‘level-32‘）
imgMat8=quantize（imgMat8）;?%Reduce?gray?level??to?8
subplot（233）;
imshow（imgMat8）
title（‘level-8‘）
imgMat9=im2double（quantize（imgMat4））;?%Reduce?gray?level??to?4
subplot（234）;
imshow（imgMat9）
title（‘level-4‘）
imgMat10=im2double（quantize（imgMat2））;?%Reduce?gray?level??to?2
subplot（235）;
imshow（imgMat10）
title（‘level-2‘）

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2016-12-27?10:06??hw?code-matlab\
?????文件????????6148??2016-12-23?11:25??hw?code-matlab\.DS_Store
?????目錄???????????0??2018-04-30?23:55??__MACOSX\
?????目錄???????????0??2018-04-30?23:55??__MACOSX\hw?code-matlab\
?????文件?????????120??2016-12-23?11:25??__MACOSX\hw?code-matlab\._.DS_Store
?????目錄???????????0??2016-12-23?11:21??hw?code-matlab\hw1\
?????文件???????68879??2014-10-16?00:55??hw?code-matlab\hw1\45.png
?????文件????????1544??2016-12-23?10:46??hw?code-matlab\hw1\hw1.m
?????目錄???????????0??2018-04-30?23:55??__MACOSX\hw?code-matlab\hw1\
?????文件?????????120??2016-12-23?10:46??__MACOSX\hw?code-matlab\hw1\._hw1.m
?????文件?????????276??2016-12-23?10:48??hw?code-matlab\hw1\quantize.m
?????文件?????????120??2016-12-23?10:48??__MACOSX\hw?code-matlab\hw1\._quantize.m
?????文件????????1049??2016-12-23?10:02??hw?code-matlab\hw1\scale.m
?????文件?????????120??2016-12-23?10:02??__MACOSX\hw?code-matlab\hw1\._scale.m
?????目錄???????????0??2016-12-12?22:33??hw?code-matlab\hw2\
?????文件???????73141??2016-12-12?11:47??hw?code-matlab\hw2\45.png
?????文件?????????467??2016-12-12?14:36??hw?code-matlab\hw2\equalize_hist.m
?????目錄???????????0??2018-04-30?23:55??__MACOSX\hw?code-matlab\hw2\
?????文件?????????120??2016-12-12?14:36??__MACOSX\hw?code-matlab\hw2\._equalize_hist.m
?????文件?????????385??2016-12-22?11:57??hw?code-matlab\hw2\filter2d.m
?????文件?????????120??2016-12-22?11:57??__MACOSX\hw?code-matlab\hw2\._filter2d.m
?????文件?????????197??2016-12-12?14:27??hw?code-matlab\hw2\hist.m
?????文件?????????120??2016-12-12?14:27??__MACOSX\hw?code-matlab\hw2\._hist.m
?????文件????????1309??2016-12-22?12:00??hw?code-matlab\hw2\hw2.m
?????文件?????????120??2016-12-22?12:00??__MACOSX\hw?code-matlab\hw2\._hw2.m
?????目錄???????????0??2016-12-21?16:53??hw?code-matlab\hw3\
?????文件???????73141??2016-12-20?15:07??hw?code-matlab\hw3\45.png
?????目錄???????????0??2018-04-30?23:55??__MACOSX\hw?code-matlab\hw3\
?????文件?????????277??2016-12-20?15:07??__MACOSX\hw?code-matlab\hw3\._45.png
?????文件?????????774??2016-12-21?10:19??hw?code-matlab\hw3\dft2d.m
?????文件?????????120??2016-12-21?10:19??__MACOSX\hw?code-matlab\hw3\._dft2d.m
............此處省略30個文件信息