将 Photoshop 文档另存为 .pdf 会导致图像模糊/像素化
我正在使用 Photoshop CS2 设计一份传单，旨在通过电子邮件以 .pdf 形式分发。 我的文档是 72 dpi，我认为这是适合非打印用途的默认值。
文档中有一张图像，一个徽标，当我将文档另存为 .pdf 时，它在 Acrobat reader 中始终显示为像素化。 在 Photoshop 中看起来不错。 我已经尝试了几乎所有选项和“另存为”选项的组合，没有任何区别。
我尝试了该图像的 tiff 和 jpg 版本，但均无济于事。 我还注意到，如果我在另存为时选择不压缩，则生成的文件大小将非常巨大 - 10+ 兆，即使图像只有 10k！ 并且图像仍然是像素化的。
有什么建议么？
谢谢理查德。
I am using Photoshop CS2 to design a leaflet which is intended for distribution by email as a .pdf. My document is 72 dpi, which i believe is a suitable default for non-printing use.
There is one image in the document, a logo, and this is always appearing pixelated in Acrobat reader when i save the doc as .pdf. It looks fine in Photoshop. I have tried just about every option and combination of "Save As" options, nothing makes any difference.
I have tried both tiff and jpg versions of the image, to no avail. I also notice that if i choose no compression when Saving As, the resulting file size is gigantic - 10+ megs, even though the image is only 10k! And the image STILL is pixelated.
Any suggestions?
Thanks Richard.
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我意识到这个问题已经有几年了，但我想我会为其他遇到这个问题的人提供一个可能的解决方案。 它并不完美，但它产生的结果比我迄今为止尝试过的任何其他方法都要好得多。
注意：假设您正在处理 72ppi 的 Photoshop 文档（我使用的是 CS5）。
首先确保您安装了 PDF 打印机。
然后在 Photoshop 中转到文件 > 打印并选择上述打印机。
单击“打印设置...”并从默认设置框中选择“高质量打印”。 （或者点击右侧的“编辑”，并确保将图像质量设置为最高）。
仍在打印设置对话框中，转到“Adobe PDF 页面大小：”，然后单击“添加..”
将新纸张尺寸命名为“doc”（或任何您真正想要的尺寸） ）。
单击“添加/修改”关闭对话框。 确保从“Adobe PDF 页面大小”下拉列表中选择新的纸张尺寸，然后点击“确定”。
在“缩放打印尺寸”中 框区域将比例更改为 66%（这应该使打印分辨率显示为 109 PPI）。
作为旁注，您可以尝试使用 110ppi，计算您的尺寸并将比例更改为 65% 以匹配。 但根据我的经验，无论出于什么原因，109 效果更好。
如果您想知道这有什么帮助，Adobe Reader/Acrobat 默认情况下会以 110ppi 显示 PDF，因此通过创建 PDF 来反映这一点（是的，降低了 1ppi），它看起来就是 100% 的 100%。
再说一次，这对我有用，希望你也有同样的运气。
I realize this question is a few years old but thought I'd offer a possible solution for anyone else having this issue. It isn't perfect but it produced much better results than anything else I've tried so far.
Note: this is assuming you're working off of a 72ppi Photoshop document (I'm using CS5).
First ensure you have a PDF printer installed.
Then in Photoshop go to File > Print and select the aforementioned printer.
Click "Print Settings..." and select "High Quality Print" from the default settings box. (Or click "Edit" to the right and make sure your image quality is set to max).
Still in the print settings dialog, go down to "Adobe PDF Page Size:" and click "Add.."
Name your new paper size "doc" (or whatever you want really).
Then for the size divide your document width by 109 (ppi) and your height by 109 (again ppi) and enter the resulting values in their respective locations (making sure inches is selected).
Click "Add/modify" to close the dialog. Make sure your new paper size is selected from the "Adobe PDF Page Size" dropdown and hit "OK."
In the "Scaled Print Size" box area change the scale to 66% (which should make the print resolution read 109 PPI).
Click "Print", save your document and hopefully your PDF looks much better!
As a side note, you could try using 110ppi instead, calculating your size and changing the scale to 65% to match. But from my experience, for whatever reason, 109 worked better.
If you're wondering how this helps, Adobe Reader/Acrobat tend to display PDF's at 110ppi by default, so by creating the PDF to reflect this (yes, it's 1ppi off) it looks 100% at 100%.
Again, this is what worked for me, hopefully you have the same luck.
如果它是一个徽标，您应该嵌入它的矢量版本，以便无论如何它都能正确缩放。 这根本不是 Photoshop 工作，创建 PDF 传单也不是 Photoshop 工作。
但根据经验，无论预期的媒体是什么，至少使用所需 dpi 的两倍 - 特别是当您使用不可缩放的图形元素时。 另外，您注意到的 72 dpi 想法根本不正确 - 搜索 72 dpi 神话或事实可能会给出一些 有用的结果至少试图解释它的奇怪之处......
If it's a logo, you should embed a vector version of it instead so it scales properly regardless. This is simply not a Photoshop job, nor is creating a PDF leaflet a Photoshop job.
But as a rule of thumb, regardless of the intended media, use atleast twice the dpi needed for it - especially if you use non-scalable graphics elements. Also, the 72 dpi idea as you noticed simply isn't true - searching for 72 dpi myths or facts might give some useful result atleast trying to explain the wierdness of it...
Photoshop 确实不是传单和海报设计等发布任务的最佳选择。 如果您有足够的财力，则可以使用 Adobe 系列，您可以使用 InDesign 进行页面布局，使用 Illustrator 进行图形和徽标的矢量图形。
在自由和开源方面，请考虑使用 Inkscape 绘制线条图和 Scribus 用于页面布局。
在许多方面，Scribus 比任何 Adobe 工具都能更好地生成高质量 PDF 文档。 它是一个庞大而复杂的工具，真正适合高端出版，但它可以完成工作。
看起来像素化的问题几乎肯定是 Photoshop 将页面图像转换为 PDF 页面的位图图像层时用于图像压缩的设置的结果。 我自己对这种方法一直不满意，因为你遇到了各种各样的问题。
生成用于打印的 PDF 时，您需要调整所有图形元素的大小，以便在纸张上布局，图像中的可用像素数至少与纸张上的可用像素数相同。 在 300 dpi 下，2x3 英寸的照片必须至少为 600x900 像素。 根据许多其他因素，将图像大小设置为实际打印分辨率的整数倍可能很重要，以获得最佳效果。 根据您的打印提供商的不同，您可能还需要确保您的插图仅使用预期打印过程的色域内颜色...
在生成供屏幕使用的 PDF 时，通常假设屏幕为 72 或 96 dpi 。 两者都不完全正确，但对于普通用户来说都足够接近真实情况。 另请注意，在屏幕上使用的文档几乎肯定应在 SRGB 色彩空间中准备，该色彩空间基于平均未校准 RGB 显示器上可用的颜色。 避免使用 AdobeRGB 等小众色彩空间的诱惑，因为它们只适合极少数了解色彩工作流程并拥有校准显示器的用户。 顺便说一下，您已经校准了显示器，对吗？
Photoshop really isn't the best choice for publishing tasks such as design of leaflets and posters. Sticking within the Adobe family if you have deep enough pockets, you could look at InDesign for page layout and Illustrator for vector artwork for figures and logos.
On the free and open source side of the divide, consider Inkscape for line drawings and Scribus for page layout.
Scribus is in many ways a better producer of high-quality PDF documents than any of the Adobe tools. It is a large and complicated tool that is really intended for high end publishing, but it will get the job done.
Your problem with things looking pixilated is almost certainly the result of the settings used for image compression when Photoshop transformed your page image into the bitmap image layer of a PDF page. I have never been happy with that approach, myself, because of the kinds of problems you are having.
When producing a PDF for print, you need to have all of your graphic elements sized so that layed out on paper, at least as many pixels are available in the image as on that much paper. At 300 dpi, a 2x3 inch photo must be at least 600x900 pixels. Depending on lots of other factors, it may be important that the image be sized to an integer multiple of the actual print resolution for best results. Depending on your print provider, you might also need to make sure that your illustrations use only in-gamut colors for the intended print process...
When producing a PDF for screen use, it is conventional to assume that screens are 72 or 96 dpi. Neither is precisely correct, but both are close enough to true for the average user. Note, also, that documents for use on screen should almost certainly be prepared in the SRGB color space, which is based on the colors available on an average uncalibrated RGB monitor. Avoid the temptation to use niche color spaces such as AdobeRGB, because they will only look right to the vanishingly small percentage of users that know about color workflow and have calibrated monitors. Incidentally, you have calibrated your monitor, right?
无论您的实际显示器尺寸或分辨率如何，Windows 都会将正常的 Windows 显示视为 96 DPI。 我不知道 Mac 上有什么用。
A normal Windows display is considered by Windows to be 96 DPI, regardless of your actual monitor size or resolution. I don't know what it is for a Mac.
在Word 2010（应该可以在2007中使用）右键单击图片/图像并选择“编辑图片”，弹出窗口将显示：“这是导入的图片，而不是组。是否要将其转换为Microsoft办公室绘图对象？” 单击“是”。 然后再次右键单击图像，这次选择：设置图片格式。 单击预设下拉菜单，然后选择最清晰/最锐利的图像。
In Word 2010 (should work in 2007) Right click on the picture/image and select "edit picture", a pop up window will state: "this is an imported picture, not a group. Do you want to convert it to a Microsoft Office drawing object?" click YES. Then Right click on the image again, and this time choose: format picture. Click on the preset drop down, and choose the clearest/sharpest image.
好的，我已经解决了这个问题 - 差不多了。
当在 Acrobat Reader 中以 100% 的显示缩放比例显示时，该图像看起来像素化。 我假设 100% 只是意味着如果文档宽度为 1,000 像素，那么它将在屏幕上以 1,000 像素渲染。 然而，这种情况并非如此。 我不明白 100% 的确切含义，但是在 100% 时，它会以更大的尺寸渲染，例如 1,300 像素。 因此，图像在拉伸时会像素化。 如果我将缩放减少到约 70%，那么它会呈现良好的效果。
我猜测 Acrobat 正在尝试以“英寸”而不是像素来呈现文档。 我的文档是 A4 = 8.5 英寸宽，我认为 Acrobat 正在以我的屏幕分辨率渲染 8.5 英寸文档，用尺子仔细测量的分辨率为 110 dpi。
无论如何，解决方案是 a) 缩小到 70%，或者，正如我想象的那样，大多数人会认为 100% 是最佳缩放，b) 以 110 dpi 或更高一点的分辨率重新制作文档，以适应无论现在有什么典型的解决方案。
OK, I have fixed this - sort of.
The image looked pixelated when displayed in Acrobat Reader at a display zoom of 100%. I assumed that 100% would simply mean that if doc was say 1,000 pixels wide, it would render at 1,000 pixels on the screen. However this is not the case. I don't understand what 100% means exactly, however at 100% it is being rendered at a somewhat larger size, say 1,300 pixels. Hence the image is pixelated as it is being stretched. If I reduce zoom to ~70%, then it renders fine.
I'm guessing that Acrobat is attempting to render the doc in terms of "inches" and not pixels. My doc is A4 = 8.5 inches wide, I think Acrobat is rendering an 8.5 inch doc at my screen resolution, which per careful measurements with a ruler is 110 dpi.
Anyway, the solution is therefore a) de-zoom to 70%, or, as I imagine most people will assume 100% is the optimal zoom, b) to re-do the doc at 110 dpi, or a little higher, to accomodate whatever typical resolutions are these days.