Blurry image inserted or copy/pasted

asked 2019-01-12 22:41:17 +0100

Transit gravatar image

updated 2019-01-13 19:48:52 +0100

I got blurry image after copy-pasted from website to LibreOffice. Searched around no solution found thus this thread. It make me no more fun to write in PC!:-)

But it seems a common issue at LibreOffice & MS.Office? Maybe relate to HiDPI screen? In macOS high Sierra , people reported blurry PDF in Preview too.

Hereby my test conditions:


  • macOS 10.13.2, LibreOffice,
  • macOS 10.13.2, MS.Office 2016
  • Windows 10 x64, MS.Office 2016


  • Screen_1: 2560 x 1440(native) but scaled to 1600x900
  • Screen_2: 1920 x 1080

also I notice the page scale ratio is not consistent, If only Screen_1, 85% as readable; but if extended to Screen_2, it must be 130%!

My trial methods are:

  • Copy a website image(which is a .png), and paste directly into LibreOffice, it is then blurry and not readable,
  • Also I tried to download that png and insert, same blurry results
  • Under context menu "compress", I can play with ratio or dpi, but that still not satisfied, not a reliable solution
  • Convert png to eps and insert got sharp image, but size too big and mouse scroll very slow

Edit_1: Do you have the same issue? if not, please let me know your setting. thanks!

Edit_2: I think I may find the reason(not solution yet)! jut now I did a test, set laptop only and with native resolution of 2560x1440 for macOS LibreOffice, copy same source image from website, paste into LibreOffice, voila! same sharp image as original. Also I save the file, then open with extended Screen_2, image remain clear!

So it seems LibreOffice use OS system info to scale/compress the image while pasting into LS.Writer! That means a algorithms of calculation of image size for example, most probably it has a global value/ratio and a local ratio, if 2 times calculated/resize, the image will be largely compromised thus blurry!

Edit_3: Now I have tried 3 word processing software in macOS 10.13.2, here the findings: (LibreOffice = LO), MS.Office2016 = MO, Apple.Pages = AP)

  • For single screen (HiDPI 2560x1440 scaled to 1600x900), LO in A4 100% scale is exactly the size of A4 paper! But MO and AP both needs to scale to 183%!
  • If copy & paste an image:
    • LO get as clear as original if 100% scaled, but if zoomed up/down after then, it is blurry; Also if initial scale was not 100%, zoom will be blurry. But export to PDF no problem (at least if initial scale was 100% while C&P);
    • MO & AP get almost lossless zoom-ability! also PDF export is clear.

Above is only at single screen test.

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I'm getting the same issue on Mac OSX 10.13.2 using LibreOffice

I downloaded a slideshow from Google Slides into an ODP format. All of the PNG files are blurry. I tried replacing them with the originals, but when I scale them down the quality depreciates significantly, leaving them pixelated.

cedewey gravatar imagecedewey ( 2019-01-16 22:43:47 +0100 )edit