Windows 10: Disable Desktop Wallpaper JPEG Quality Reduction in Windows 10  

    Disable Desktop Wallpaper JPEG Quality Reduction in Windows 10

    Disable Desktop Wallpaper JPEG Quality Reduction in Windows 10

    How to Enable or Disable JPEG Desktop Wallpaper Import Quality Reduction in Windows 10
    Published by Category: Customization
    20 Jul 2018
    Designer Media Ltd

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    Brink's Avatar
    Administrator

    Posts: 30,728

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    How to Enable or Disable JPEG Desktop Wallpaper Import Quality Reduction in Windows 10


    When you set an image as your desktop background wallpaper or slideshow, Windows will import a copy of this image and store it as the TranscodedWallpaper file in the %AppData%\Microsoft\Windows\Themes folder. Your desktop background wallpaper is loaded from this TranscodedWallpaper file cache.

    If you select a JPEG image as your desktop background wallpaper, then Windows will automatically compress and reduce the quality of the imported copy to only 85% of the original JPEG image quality. This is done to help save disk space, RAM, and improve the performance of Windows while showing the desktop wallpaper image or when cycling wallpaper images during a desktop slideshow. Of course, the JPEG desktop wallpaper will not look as good as the original.

    If you have a decent performing system, then you may wish to disable this automatic quality reduction of JPEG desktop wallpapers to have the imported image show with the full quality as the original JPEG image.

    This tutorial will show you how to enable or disable the automatic import quality reduction of a JPEG desktop wallpaper for your account in Windows 10.

    If you use a PNG image as your desktop background wallpaper or slideshow, then you are not affected by this automatic quality reduction since it only happens to JPEG images.



    Here's How:

    The downloadable .reg files below will add and modify the DWORD value in the registry key below.

    HKEY_CURRENT_USER\Control Panel\Desktop

    JPEGImportQuality DWORD

    (delete) = Enable JPEG import quality reduction
    64 (hex) or 100 (decimal) = Disable JPEG import quality reduction



    1. Do step 2 (disable) or step 3 (enable) below for what you would like to do.


     2. To Disable JPEG Desktop Wallpaper Import Quality Reduction

    A) Click/tap on the Download button below to download the file below, and go to step 4 below.

    Disable_JPEG_Desktop_wallpaper_import_quality.reg

    download


     3. To Enable JPEG Desktop Wallpaper Import Quality Reduction

    This is the default setting.

    A) Click/tap on the Download button below to download the file below, and go to step 4 below.

    Enable_JPEG_Desktop_wallpaper_import_quality.reg

    download

    4. Save the .reg file to your desktop.

    5. Double click/tap on the downloaded .reg file to merge it.

    6. When prompted, click/tap on Run, Yes (UAC), Yes, and OK to approve the merge.

    7. Restart the computer to apply.

    8. Change your desktop background wallpaper to the JPEG file you want to import a new copy for your applied changes.

    9. You can now delete the downloaded .reg file if you like.


    That's it,
    Shawn



  1. Posts : 21,035
    Win10 Pro, Win10 Pro N, Win10 Home, Win10 Pro Insider Fast Ring, Windows 8.1 Pro, Ubuntu
       04 Oct 2016 #1

    Thanks for the info Shawn, I posted your info and note boxes in the wallpaper thread, for the other paper geeks: User Created Windows Ten Wallpapers [2] - Page 188 - Windows 10 Forums
      My ComputersSystem Spec


  2. Posts : 30,728
    64-bit Windows 10 Pro build 17713
    Thread Starter
       04 Oct 2016 #2

      My ComputersSystem Spec

  3.    05 Oct 2016 #3

    question :

    I saw above the word "import"

    so , this tweak matter only on new future installed wallpapers
    or is in fact applied also on the existing wallpaper
    maybe after a restart or not ?

    [ I suppose the actual wallpaper is already imported somewhere in user folder cache]

    c
      My ComputerSystem Spec


  4. Posts : 30,728
    64-bit Windows 10 Pro build 17713
    Thread Starter
       05 Oct 2016 #4

    Hello C, :)

    It gets applied to the next new wallpaper you change to after a restart.
      My ComputersSystem Spec


  5. Posts : 3,376
    3-Win-7Prox64 2-Win10Prox64
       13 Mar 2017 #5

    Sweet
      My ComputersSystem Spec

  6.    1 Day Ago #6

    There is a small error here, 64 in this case will increase the compression to 64%.To be without compression, set the decimal system 100 (256 hexadecimal)Then the wallpaper quality will be set to 100%
      My ComputerSystem Spec


  7. Posts : 30,728
    64-bit Windows 10 Pro build 17713
    Thread Starter
       1 Day Ago #7

    Bladius2018 said: View Post
    There is a small error here, 64 in this case will increase the compression to 64%.To be without compression, set the decimal system 100 (256 hexadecimal)Then the wallpaper quality will be set to 100%
    No worries. 64 hex is 100 decimal.

    Name:  JPEGImportQuality.png
Views: 61
Size:  44.7 KB
      My ComputersSystem Spec

  8.    1 Day Ago #8

    Brink said: View Post
    No worries. 64 hex is 100 decimal.

    Name:  JPEGImportQuality.png
Views: 61
Size:  44.7 KB
    I got lost, on various forums including Microsoft, everyone says that it should be 100 in decimal and 256 in hexadecimal.so it sets Dism ++ firmware to the highest quality
      My ComputerSystem Spec

  9.    1 Day Ago #9

    TranscodedWallpaper is 740 KB on this value (new set wallpaper) original wallpaper is size 812 KB :/
      My ComputerSystem Spec


 

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