我想要压缩文件夹D：\ Dr.Ayush Singhal \ Ph.D编码和数据库\ compression * .jpg中的500张图像并将压缩图像保存在具有路径D的其他文件夹中：\ Dr.Ayush Singhal \ Ph.D编码和数据库\ compression \ CompressQuality80 \ image（k）.jpg。
我在MATLAB中编写了一个编码。
压缩程序正在同时处理来自指定路径的所有图像 保存压缩数据时，代码无法保存指定文件夹中的所有图像。 编码是
clc
clear all;
close all;
**% IMAGE RETRIVING**
dirlist=dir('D:\Dr.Ayush Singhal\Ph.D coding and database\compression\*.jpg');
NF=length(dirlist)
%f=zeros(NF,1);
for k=1:NF
fname = dirlist(k).name;
[path,name,ext] = fileparts(fname);
im=strcat(path,name,ext);
**% IMAGE COMPRESSION**
im=imread(im);
im=rgb2gray(im);
im=imresize(im,5);
im=imcrop(im,[0 0 480 640]);
whos im
[row,col]=size(im);
row=double(fix(row/8))*8;
col=double(fix(col/8))*8;
width=col;
height=row;
im=imcrop(im,[0 0 width height]);
a22=im;
%a22=im(:,:,3);
var4=a22;
a22=double(a22)-128; %%%%Remember that DCT works only data range of
-128 to %+127%%%%%%%%
fun=@dct2;
a222=blkproc(a22,[8 8],fun); %%%%Shows the DCT2 of pixel value%%%%%%
QU=quntnew13(width,height); %%%%%%Quantization table to be used%%%%%%
a2=a222./QU; %Value After dividing with Quantization table %%
r=1;
while(r<=height)
c=1;
while(c<=width)
a4=a2(r,c);
if(a4<0)
x32(r,c)=-1;
x3(r,c)=abs(a4);
else
if(a4>0)
x4(r,c)=a4;
x42(r,c)=1;
end
end
c=c+1;
end
r=r+1;
end
x3; %%%%%%%%%Negative pixel values%%%%
x4; %%%%%%%%%positive pixel values%%%%
x32=x32+x42; %%%%%%%%%Selecting only negative value as -1%%%%%
x=x3+x4; %%DCT values only posive value(Negative also in posive form)%%%
x11=mod(x,1); %%Removing Fractional part%%%%%
x111=x-x11; %Taking only integer values%%%
X2=x111;
x111=X2;
x333=x111+x11;
x33=x333.*x32;\
a21=x33.*QU;
fun1=@idct2;
x34=blkproc(a21,[8 8],fun1);
X6=x34+128;
X6=uint8(X6);
im1=X6;
*****% COMPRESSED IMAGE WRITING*****
imwrite(im1,'D:\Dr.Ayush Singhal\Ph.D coding and database\compression\CompressQuality80\image(k).jpg','quality',80);
end
答案 0 :(得分：0)
您的问题是您保存的每个文件都具有相同的名称<script type="text/javascript">
google.charts.load('current', {'packages':['line']});
google.charts.setOnLoadCallback(drawChart);
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('number', 'Ugenr.');
data.addColumn('number', 'Anbefalet pris');
data.addColumn('number', 'Nuværende pris');
data.addRows([
[1, 37.8, 41.8],
[2, 6.6, 32.4],
[3, 25.4, 25.7],
[4, 11.7, 10.5],
[5, 11.9, 6.6],
[6, 8.8, 7.7],
[7, 7.6, 9.6],
[8, 12.3, 10.6],
[9, 6.6, 14.8],
[10, 12.8, 11.6],
[11, 5.3, 4.7],
[12, 6.6, 5.2],
[13, 4.8, 3.6],
[14, 4.2, 3.4],
[15, 8.8, 31.8],
[16, 30.9, 6.6],
[17, 25.4, 25.7],
[18, 11.7, 10.5],
[19, 11.9, 10.4],
[20, 6.6, 7.7],
[21, 7.6, 9.6],
[22, 12.3, 10.6],
[23, 16.9, 14.8],
[24, 12.8, 11.6],
[25, 5.3, 4.7],
[26, 6.6, 5.2],
[27, 4.8, 3.6],
[28, 4.2, 6.6],
[29, 37.8, 41.8],
[30, 30.9, 32.4],
[31, 25.4, 25.7],
[32, 11.7, 10.5],
[33, 11.9, 10.4],
[34, 8.8, 7.7],
[35, 7.6, 9.6],
[36, 12.3, 10.6],
[37, 16.9, 14.8],
[38, 12.8, 11.6],
[39, 5.3, 4.7],
[40, 6.6, 5.2],
[41, 6.6, 3.6],
[42, 4.2, 6.6],
[43, 4.2, 3.4],
[44, 37.8, 41.8],
[45, 30.9, 32.4],
[46, 25.4, 25.7],
[47, 11.7, 10.5],
[48, 11.9, 6.6],
[49, 8.8, 7.7],
[50, 7.6, 9.6],
[51, 6.6, 10.6],
[52, 16.9, 14.8]
]);
var options = {
chart: {
title: 'Anbefalede og nuværende ugepriser',
subtitle: 'anbefalede priser = blå, nuværende priser = rød',
hAxis: {maxValue: 52}
},
legend: { position:'none' },
height: 500,
explorer: { actions: ['dragToZoom', 'rightClickToReset'] }
};
var chart = new google.charts.Line(document.getElementById('linechart_material'));
chart.draw(data, options);
}
$(window).resize(function(){
drawChart();
});
</script>
，因此在for循环结束时您将只进行最后一次迭代，为了保存每个图像，您必须分配在每次迭代中有不同的名称，有几种方法可以实现这一点。一个简单的解决方案是：
image(k)这将创建文件file_name=sprintf('D:\Dr.Ayush Singhal\Ph.D coding and database\compression\CompressQuality80\image(%d).jpg',k);
imwrite(im1,file_name,'quality',80);
，image(1)，image(2)等。一个用于for循环中的每次迭代。