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資源簡介

該代碼實現了以2為因子的圖像升采樣和降采樣功能。 降采樣包括使用平滑濾波器(with using the averaging filter)和不使用平滑濾波器(without using the averaging filter)兩種方法。 升采樣包括像素點直接復制(pixel replication method)和線性插值(bilinear interpolatoin method)兩種方法。 降采樣方法和升采樣方法共有4種組合。程序運行后，給出了一個原始圖片和四個結果圖片。 圖片1.原始圖片。 圖片2.平滑濾波器降采樣&像素點直接復制升采樣。

資源截圖

代碼片段和文件信息 

%Function:Down?and?Up?Sampling?by?Factor?2
%Input:yourimage.jpg
%Output:?Four?Images
%????????Figure1.Up:pixel?replication?&?Down:without?using?the?averaging?filter
%????????Figure2.Up:pixel?replication?&?Down:with?using?the?averaging?filter
%????????Figure3.Up:bilinear?interpolation?&?Down:without?using?the?averaging?filter
%????????Figure4.Up:bilinear?interpolation?&?Down:with?using?the?averaging?filter

clc;clear?all;close?all;

%%%%%%%%%%%%%%%%
%%%??Imread??%%%
%%%%%%%%%%%%%%%%
I0=imread（‘yourimage.jpg‘）;
I=rgb2gray（I0）;
imshow（I[]）;title（‘Original?Image‘）;
I=double（I）;
[height?width]=size（I）;
hheight=height/2;hwidth=width/2;
dI1=zeros（hheighthwidth）;dI2=zeros（hheighthwidth）;

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%??Down?Sample?by?a?Factor?2??%%%
%%%%%%%%%%%%

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