MATLAB - 将图像写入 eps 文件

发布于 2024-08-25 18:26:30 字数 1035 浏览 2 评论 0原文

在 MATLAB 中，如何将矩阵写入 EPS 格式的图像中？

看来imwrite不支持EPS。

Convert 在我使用的 Linux 服务器上无法工作：

$ convert exploss_stumps.jpg exploss_stumps.eps
convert: missing an image filename `exploss_stumps.eps' @ convert.c/ConvertImageCommand/2838

为什么？

我在终端模式下尝试了 gnovice 的想法：

    figH = figure('visible','off') ;
imshow(img,'border','tight',...      %# Display in a figure window without
        'InitialMagnification',100);  %#    a border at full magnification
print(strcat(filepath,'/', dataset,'_feature_',num2str(j), '.eps'),'-depsc2');
    close(figH) ;

但是我得到了：

???使用 ==> 时出错imshow 位于 191
IMSHOW 需要 Java 才能运行。

错误==> Study_weaker 122
imshow(img,'border','tight',... %# 在没有
的图形窗口中显示
191 error(eid,'%s 需要 Java 才能运行。',upper(mfilename));

我该如何修复它？

原文

In MATLAB, how do you write a matrix into an image of EPS format?

It seems imwrite does not support EPS.

Convert is not working on the Linux server I am using:

$ convert exploss_stumps.jpg exploss_stumps.eps
convert: missing an image filename `exploss_stumps.eps' @ convert.c/ConvertImageCommand/2838

Why?

I tried gnovice's idea under terminal mode:

    figH = figure('visible','off') ;
imshow(img,'border','tight',...      %# Display in a figure window without
        'InitialMagnification',100);  %#    a border at full magnification
print(strcat(filepath,'/', dataset,'_feature_',num2str(j), '.eps'),'-depsc2');
    close(figH) ;

However I got:

??? Error using ==> imshow at 191
IMSHOW requires Java to run.
Error in ==> study_weaker at 122
imshow(img,'border','tight',... %# Display in a figure window without
191 error(eid,'%s requires Java to run.',upper(mfilename));

How can I fix it?

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耶耶耶 2024-09-01 18:26:30

一种可能的解决方案是使用 IMSHOW 绘制图像，然后使用 PRINT 将整个图形打印为 .eps ：

img = imread('peppers.png');         %# A sample image
imshow(img,'Border','tight',...      %# Display in a figure window without
       'InitialMagnification',100);  %#    a border at full magnification
print('new_image.eps','-deps');      %# Print the figure as a B&W eps

此解决方案的一个缺点是，如果图像太大而无法在屏幕上显示，IMSHOW 会将其缩小以适合，这将降低图像的屏幕分辨率。但是，您可以使用 -r PRINT 功能选项。例如，您可以通过执行以下操作将图形打印为分辨率为 300 dpi 的 Encapsulated Level 2 Color PostScript：

print('new_image.eps','-depsc2','-r300');

编辑： 如果您无法使用 IMSHOW （因为您没有图像处理工具箱或者因为您使用的 MATLAB 模式不允许），这里是另一种方法创建和打印图形：

img = imread('peppers.png');      %# A sample image
imagesc(img);                     %# Plot the image
set(gca,'Units','normalized',...  %# Set some axes properties
        'Position',[0 0 1 1],...
        'Visible','off');
set(gcf,'Units','pixels',...      %# Set some figure properties
        'Position',[100 100 size(img,2) size(img,1)]);
print(gcf,'new_image.eps','-depsc2','-r300');  %# Print the figure

您还可以查看此文档了解如何在没有显示器的情况下进行打印。

One possible solution is to plot your image using IMSHOW, then print the entire figure as a .eps using PRINT:

img = imread('peppers.png');         %# A sample image
imshow(img,'Border','tight',...      %# Display in a figure window without
       'InitialMagnification',100);  %#    a border at full magnification
print('new_image.eps','-deps');      %# Print the figure as a B&W eps

One drawback to this solution is that if the image is too big to fit on the screen, IMSHOW will shrink it to fit, which will reduce the on-screen resolution of the image. However, you can adjust the final resolution of the saved image using the -r<number> option for the PRINT function. For example, you can print your figure as an Encapsulated Level 2 Color PostScript with a resolution of 300 dpi by doing the following:

print('new_image.eps','-depsc2','-r300');

EDIT: If you are unable to use IMSHOW (either because you don't have the Image Processing Toolbox or because you are using a MATLAB mode that doesn't allow it), here is an alternative way to create and print the figure:

img = imread('peppers.png');      %# A sample image
imagesc(img);                     %# Plot the image
set(gca,'Units','normalized',...  %# Set some axes properties
        'Position',[0 0 1 1],...
        'Visible','off');
set(gcf,'Units','pixels',...      %# Set some figure properties
        'Position',[100 100 size(img,2) size(img,1)]);
print(gcf,'new_image.eps','-depsc2','-r300');  %# Print the figure

You can also take a look at this documentation to see how printing works without a display.

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久伴你 2024-09-01 18:26:30

它应该可以使用 imwrite 来工作。不过，您必须添加颜色图才能使其正常工作。

然而，检查帮助页面我发现不可能使用 imwrite 写入 EPS 文件。

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心碎无痕… 2024-09-01 18:26:30

以下代码可以帮助您将 png 文件转换为 eps。

fileName = 'FarmerStats'; % your FILE NAME as string

A = imread(fileName,'png');
set(gcf,'visible','off') %suppress figure
image(A);                
axis image               % resolution based on image
axis off                 % avoid printing axis 
set(gca,'LooseInset',get(gca,'TightInset')); % removing extra white space in figure
saveas(gcf,fileName,'epsc');   % save as COLOR eps file

Following code may help you to convert png file to eps.

fileName = 'FarmerStats'; % your FILE NAME as string

A = imread(fileName,'png');
set(gcf,'visible','off') %suppress figure
image(A);                
axis image               % resolution based on image
axis off                 % avoid printing axis 
set(gca,'LooseInset',get(gca,'TightInset')); % removing extra white space in figure
saveas(gcf,fileName,'epsc');   % save as COLOR eps file

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