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如何提取圖像從Powerpoint文件

2007年3月27日 · 由大衛布雷得里

我工作與很多科學家，當請求印刷質量圖像為出版物在紙時或雜誌經常送我Powerpoint幻燈節目或Adobe PDF文件。 偶爾地，我將接受他們從他們的網站保存在72ppi的半寸Gif。 這樣圖像比八分之一適當地很少打印， A半寸72ppi Gif文件意志屏幕印刷品在較少一英寸，一般是無用的，不顧事實那Gif也被限制到256種顏色。 無論如何，我偏離主題。

我接受的某些Powerpoint (PPT)文件是巨大的和這叫化子問題-有沒有圖像文件在那威力之內是萃取物在印刷質量決議？ 答復幾乎一定是。 是。 如此，您怎麼提取高分辨率圖像從Powerpoint文件？

明顯的方法將打開文件菜單和選擇「除之外和…」，交換「介紹」文件類型到「其他可利用的圖表格式TIFF」 (或之一列出了，例如JPEG。 Powerpoint然後問您是否想要保存當前幻燈片或所有滑，您支付您的金錢，并且您採取您的選擇。 但，一嚴肅下側到這種方法： 您不會檢索印刷質量圖表，這些將是從幻燈片出口的低分辨率的圖像。

有工具- PPTools -允許您增長對圖像的決議您出口從Powerpoint文件，但許多用戶將是不願意支付這樣節目。 基本的節目是幾美元，但，如果您想要設置您$750的批處理器。 如此，有沒有任何選擇？ 感激地，答復問題也是，是。

而不是選擇「除之外和…」，您能選擇「除作為網頁之外…」 通過文件菜單。 但，在您做那，使幻燈片一樣大儘可能并且扯拽圖表之前的角落您希望打印在幻燈片之內儘可能大做它。 然後，選擇那個選擇，并且您用另外對話箱出席。 在探險家之下窗口在那對話是被標記的一個按鈕「出版」，點擊此，并且您出席與，更多選擇和另一個按鈕「網選擇」。 點擊此，并且，您猜測，它，更多選擇，選擇圖片製表符在那個對話箱并且改變「屏幕尺寸」到上限值(1920×1200)。 In this case, screen refers to the computer monitor rather than a lithographic print screen. No matter. Next click OK in that dialog and Publish in the next.

The result will be a clutch of new files in your folder, a static website based on the original Powerpoint slideshow. Go to the web page files folder and open it. In this folder you will find a large-ish png file, which will hopefully have pixel dimensions of 1920×1200, which is perfectly adequate for printing at about six inches width screening at 300 dots-per-inch (not to be confused with desktop printer resolution, by the way), this is print for screened publications such as newspapers and magazines.

Anyway, I hope I’ve covered all the steps adequately, give it a try and let me know how you get on.

10 responses so far ↓

  • bob sievert // Dec 21, 2007 at 10:52 am

    seems complicated - why not just left click the graphic and save it as a picture? Choice of formats is given to suit most uses

  • David Bradley // Dec 21, 2007 at 12:03 pm

    Hi Bob, thanks for the comment. It’s not quite as simple as a right-click-save if you want to extract the image at the highest resolution for a print publication, it always save at some default low res size which is invariably too small for print screening.

    db

  • Chris Etheredge // Mar 15, 2008 at 2:02 pm

    1920×1200 is nice, but that is not big enough for a publication that requires a 600 dpi image. I’m in the process right now of re-submitting figures for a paper, and the journal has replied, telling me that the figure is not high enough resolution. I used the “Save As” function to create a 2250×2999 PNG image (300 dpi). This is the largest PNG that PowerPoint will spit out even though in the SaveAs options, the dpi values go up to 1600 dpi. I then took this image into Adobe Photoshop and upsampled the resolution to 600 dpi. I submitted this 4154×4362 image to the journal, and they’re still telling me it’s not enough. I feel like I’m in a tight spot if PowerPoint can’t generate an image any bigger.

  • David Bradley // Mar 17, 2008 at 9:13 am

    What publication requires 600dpi camera-ready copy? Most printing presses screen at 300dpi, or even 200 dpi (this dpi is not related to your desktop printer output by the way). If you’re sending them a 1920 pixel-width image and they’re screening at 600dpi for print, then that will be perfectly adequate at a print size of more than 3 inches across. How big do they need your image to print, for goodness sake?

    I sometimes wonder if journal sub-editors are ever actually trained in the business of print these days.

    db

  • Chris Etheredge // Mar 25, 2008 at 10:06 pm

    Thanks for your reply David. This must have been a case of the “untrained sub-editors,” because we re-submitted the same file, and they were happy! I was surprised too when they (the journal is PLoS Pathogens) required that high of a resolution, especially when the figures will only be printed at a couple inches across. Thanks again for your input.

  • David Bradley // Mar 26, 2008 at 10:24 am

    Good luck with the submission, let me know when it’s “in press”. As you probably know, I’m a science writer by trade and always on the look out for interesting science leads.

    db

  • BerntJarle // Mar 26, 2008 at 6:08 pm

    Great tip !
    + if you need some of the graphic PP produces (charts, etc.) you get them in png format, these you can import to Photoshop with full transparency.

  • David Bradley // Mar 26, 2008 at 6:11 pm

    PNG format is not lossless though, doesn’t it have a compressed color palette like GIF? Not so useful for print media…

    db

  • BerntJarle // Mar 27, 2008 at 12:10 am

    The picures in png format is in 32 bit (with a tranparent bit plane) the color is compressed but lossless so the quality is excellent . Great to get pictures with mirror effect etc. (with no pain) and then use them in othter graphic programs.

  • David Bradley // Mar 27, 2008 at 10:03 am

    So it is! I tend to work with RAW camera files, TIFF and JPEG, so haven’t really had a need to look into PNG, but it does look like a powerful format and infinitely better than Compuserve’s GIF…

    db

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