blocks|key|4850788|text|你好，欢迎来到Ubuntu.SE!|type|header-two|depth|inlineStyleRanges|entityRanges|data|4850789|这里有一个使用ImageMagick|offset|length|4850790|的建议|unstyled|4850791|您可以将ImageMagick用于该任务：|4850792|4850793|http://www.imagemagick.org/script/command-line-options.php|4850794|示例|4850795|下面是一个40x30像素原始图像(文件大小为1367+bytes)，分辨率为72+PPI+(在X和Y方向)：|style|CODE|4850796|📷|atomic|4850797|可以使用以下命令更改其解析：|4850798|convert+-units+PixelsPerInch+my_original_image.jpg+-density+300+my_new_image.jpg|code-block|syntax|javascript|4850799|这是前面命令的结果：|4850800|4850801|X+Resolution+300+PPI|4850802|4850803|Y+Resolution+300+PPI|4850804|4850805|Image+Size+40x30+pixels|4850806|4850807|File+Size+981+bytes|4850808|或者如果你需要重采样：|4850809|convert+-units+PixelsPerInch+my_original_image.jpg+-resample+300+my_new_image.jpg|4850810|这意味着：|4850811|4850812|X+Resolution+300+PPI|4850813|4850814|Y+Resolution+300+PPI|4850815|4850816|Image+Size+167x125+px|4850817|4850818|File+Size+7.7+kB|4850819|例如，可以毫不犹豫地使用瘸子打开这些图像，以查看它们之间的差异。|4850820|4850821|源|4850822|https://www.imagemagick.org/discourse-server/viewtopic.php?t=18241|4850823|更多信息|4850824|https://medium.com/@onlinelogomaker/what-is-the-difference-between-dpi-ppi-resolution-and-image-size-b42328e7ed22|4850825|4850826|https://en.wikipedia.org/wiki/Image_分辨率|entityMap|0|LINK|mutability|MUTABLE|url|http://www.imagemagick.org/|1|2|IMAGE|IMMUTABLE|imageUrl|https://i.stack.imgur.com/D7z1z.png|imageAlt|3|https://i.stack.imgur.com/miF29.png|4|https://i.stack.imgur.com/EJ5tV.png|5|https://www.gimp.org/|6|7|8|https://en.wikipedia.org/wiki/Image_resolution^0|0|7|B|0|0|0|0|0|0|1M|1|0|0|5|5|M|A|12|6|1B|1|1D|1|0|0|1|2|0|0|0|0|0|1|3|0|0|K|0|0|0|K|0|0|0|N|0|0|0|J|0|0|0|0|0|1|4|0|0|K|0|0|0|K|0|0|0|L|0|0|0|G|0|C|2|5|0|0|0|0|1U|6|0|0|0|35|7|0|0|0|13|8^^$0|@$1|2|3|4|5|6|7|31|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|32|8|@]|9|@$D|33|E|34|1|35]]|A|$]]|$1|F|3|G|5|H|7|36|8|@]|9|@]|A|$]]|$1|I|3|J|5|H|7|37|8|@]|9|@]|A|$]]|$1|K|3|-4|5|H|7|38|8|@]|9|@]|A|$]]|$1|L|3|M|5|H|7|39|8|@]|9|@$D|3A|E|3B|1|3C]]|A|$]]|$1|N|3|O|5|6|7|3D|8|@]|9|@]|A|$]]|$1|P|3|Q|5|H|7|3E|8|@$D|3F|E|3G|R|S]|$D|3H|E|3I|R|S]|$D|3J|E|3K|R|S]|$D|3L|E|3M|R|S]|$D|3N|E|3O|R|S]]|9|@]|A|$]]|$1|T|3|U|5|V|7|3P|8|@]|9|@$D|3Q|E|3R|1|3S]]|A|$]]|$1|W|3|X|5|H|7|3T|8|@]|9|@]|A|$]]|$1|Y|3|Z|5|10|7|3U|8|@]|9|@]|A|$11|12]]|$1|13|3|14|5|H|7|3V|8|@]|9|@]|A|$]]|$1|15|3|U|5|V|7|3W|8|@]|9|@$D|3X|E|3Y|1|3Z]]|A|$]]|$1|16|3|17|5|H|7|40|8|@$D|41|E|42|R|S]]|9|@]|A|$]]|$1|18|3|-4|5|H|7|43|8|@]|9|@]|A|$]]|$1|19|3|1A|5|H|7|44|8|@$D|45|E|46|R|S]]|9|@]|A|$]]|$1|1B|3|-4|5|H|7|47|8|@]|9|@]|A|$]]|$1|1C|3|1D|5|H|7|48|8|@$D|49|E|4A|R|S]]|9|@]|A|$]]|$1|1E|3|-4|5|H|7|4B|8|@]|9|@]|A|$]]|$1|1F|3|1G|5|H|7|4C|8|@$D|4D|E|4E|R|S]]|9|@]|A|$]]|$1|1H|3|1I|5|H|7|4F|8|@]|9|@]|A|$]]|$1|1J|3|1K|5|10|7|4G|8|@]|9|@]|A|$11|12]]|$1|1L|3|1M|5|H|7|4H|8|@]|9|@]|A|$]]|$1|1N|3|U|5|V|7|4I|8|@]|9|@$D|4J|E|4K|1|4L]]|A|$]]|$1|1O|3|1P|5|H|7|4M|8|@$D|4N|E|4O|R|S]]|9|@]|A|$]]|$1|1Q|3|-4|5|H|7|4P|8|@]|9|@]|A|$]]|$1|1R|3|1S|5|H|7|4Q|8|@$D|4R|E|4S|R|S]]|9|@]|A|$]]|$1|1T|3|-4|5|H|7|4T|8|@]|9|@]|A|$]]|$1|1U|3|1V|5|H|7|4U|8|@$D|4V|E|4W|R|S]]|9|@]|A|$]]|$1|1W|3|-4|5|H|7|4X|8|@]|9|@]|A|$]]|$1|1X|3|1Y|5|H|7|4Y|8|@$D|4Z|E|50|R|S]]|9|@]|A|$]]|$1|1Z|3|20|5|H|7|51|8|@]|9|@$D|52|E|53|1|54]]|A|$]]|$1|21|3|-4|5|H|7|55|8|@]|9|@]|A|$]]|$1|22|3|23|5|6|7|56|8|@]|9|@]|A|$]]|$1|24|3|25|5|H|7|57|8|@]|9|@$D|58|E|59|1|5A]]|A|$]]|$1|26|3|27|5|6|7|5B|8|@]|9|@]|A|$]]|$1|28|3|29|5|H|7|5C|8|@]|9|@$D|5D|E|5E|1|5F]]|A|$]]|$1|2A|3|-4|5|H|7|5G|8|@]|9|@]|A|$]]|$1|2B|3|2C|5|H|7|5H|8|@]|9|@$D|5I|E|5J|1|5K]]|A|$]]]|2D|$2E|$5|2F|2G|2H|A|$2I|2J]]|2K|$5|2F|2G|2H|A|$2I|M]]|2L|$5|2M|2G|2N|A|$2O|2P|2Q|-4]]|2R|$5|2M|2G|2N|A|$2O|2S|2Q|-4]]|2T|$5|2M|2G|2N|A|$2O|2U|2Q|-4]]|2V|$5|2F|2G|2H|A|$2I|2W]]|2X|$5|2F|2G|2H|A|$2I|25]]|2Y|$5|2F|2G|2H|A|$2I|29]]|2Z|$5|2F|2G|2H|A|$2I|30]]]]

<h3>Hello and welcome to Ubuntu.SE!</h3>

<h1>Here is a proposal using <a href="http://www.imagemagick.org" rel="noreferrer">ImageMagick</a></h1>

<p>You can use ImageMagick for that task:<br>
<a href="http://www.imagemagick.org/script/command-line-options.php" rel="noreferrer">http://www.imagemagick.org/script/command-line-options.php</a></p>

<h1>Example</h1>

<p>Here is a <code>40x30</code> pixels original image (file size of <code>1367 bytes</code>) with a resolution of <code>72 PPI</code> (in both <code>X</code> and <code>Y</code> directions):</p>

<p><a href="https://i.stack.imgur.com/D7z1z.png" rel="noreferrer"><img src="https://i.stack.imgur.com/D7z1z.png" alt="original image"></a></p>

<p>You can change its resolution using the following command:     </p>

<pre><code>convert -units PixelsPerInch my_original_image.jpg -density 300 my_new_image.jpg
</code></pre>

<p>This is the result of the previous command:</p>

<p><a href="https://i.stack.imgur.com/miF29.png" rel="noreferrer"><img src="https://i.stack.imgur.com/miF29.png" alt="Changed PPI with density"></a>    </p>

<p><code>X Resolution 300 PPI</code><br>
<code>Y Resolution 300 PPI</code><br>
<code>Image Size 40x30 pixels</code><br>
<code>File Size 981 bytes</code></p>

<p>Or if you need resampling:    </p>

<pre><code>convert -units PixelsPerInch my_original_image.jpg -resample 300 my_new_image.jpg
</code></pre>

<p>Which gives:</p>

<p><a href="https://i.stack.imgur.com/EJ5tV.png" rel="noreferrer"><img src="https://i.stack.imgur.com/EJ5tV.png" alt="Changed PPI with resample"></a></p>

<p><code>X Resolution 300 PPI</code><br>
<code>Y Resolution 300 PPI</code><br>
<code>Image Size 167x125 px</code><br>
<code>File Size 7.7 kB</code></p>

<p>Don't hesitate to open these images with <a href="https://www.gimp.org" rel="noreferrer">Gimp</a> for example to see the differences.</p>

<p><br>
<hr></p>

<h3>Source</h3>

<p><a href="https://www.imagemagick.org/discourse-server/viewtopic.php?t=18241" rel="noreferrer">https://www.imagemagick.org/discourse-server/viewtopic.php?t=18241</a> </p>

<h3>More information</h3>

<p><a href="https://medium.com/@onlinelogomaker/what-is-the-difference-between-dpi-ppi-resolution-and-image-size-b42328e7ed22" rel="noreferrer">https://medium.com/@onlinelogomaker/what-is-the-difference-between-dpi-ppi-resolution-and-image-size-b42328e7ed22</a><br>
<a href="https://en.wikipedia.org/wiki/Image_resolution" rel="noreferrer">https://en.wikipedia.org/wiki/Image_resolution</a></p>


<p>Is it possible to change an image resolution expressed in <a href="https://en.wikipedia.org/wiki/Pixel_density" rel="nofollow noreferrer">pixels per inch (PPI)</a> in batch mode, using command line?    </p>

<p>My images resolution is currently below 100 PPI.<br>
I would like to enhance it to 300 PPI.<br>
I am preparing a document for self publish.<br>
The agency says that the images PPI should be 300.    </p>


How to change image PPI in batch mode?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

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是否可以使用命令行在批处理模式下更改以每英寸像素(PPI)表示的图像分辨率？我的图像分辨率目前低于100 PPI。我想把它提高到300 PPI。我正在准备一份供自我出版的文件。该机构说，PPI图像应该是300张。

如何在批处理模式下更改图像PPI？-腾讯云开发者社区-腾讯云

问如何在批处理模式下更改图像PPI？
EN

回答 1

Ask Ubuntu用户

你好，欢迎来到Ubuntu.SE!

这里有一个使用ImageMagick

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问如何在批处理模式下更改图像PPI？EN