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MarkView Viewer image quality impacted by Internet Explorer IE scaling APIs

Article # 3024093 - Page views: 488


Question / Problem: 

After upgrading to MarkView 10.x, some users may notice a reduction in the quality of the images being displayed in the MarkView Viewer when using the Internet Explorer (IE) browser.

Answer / Solution: 

High resolution images can appear to have poorer quality in the MarkView Viewer when the browser being used is IE. This has been investigated, and the issue is outside of MarkView, and specific to IE using older, non-optimized scaling APIs, particularly when zooming in/out. Unfortunately, IE's use of these old APIs are outside the control of Kofax.


However, to mitigate the impact of this IE issue on MarkView users, you can take the following steps:

  1. In the Viewer, ensure that all users have a default zoom of FIT TO WIDTH instead of FIT TO WINDOW.
    • Click on the User Menu - Settings (the person icon on the top right of the MarkView Viewer), and set the Default Image Zoom to FIT TO WIDTH.
    • The attached set_default_zoom_for_all_users.sql can be used to set the default zoom to FIT TO WIDTH for all current users.
  2. Ensure Kofax Import Connector (KIC) is correctly configured to scale inbound images at ingestion time: 
    • In KIC open KC Administration > Electronic Documents > Configuration > Select the email account from the bottom > Click Edit Destination > Import Settings > Change the (Scale To) value from Disabled to Letter then restart the KIC services.
    • Set up KIC to use VRS
      • VRS can be set on KIC - a different VRS license will be required.
      • VRS will then correct a number of issues on the imported images; in the same fashion as images imported via Kofax Capture.
      • KIC Destination Configuration (must be set for each used):

        • Convert to TIFF

        • Scale to Letter

        • Conversion mode: Convert all content

        • Image format: 300x300 Grayscale (VRS needs a grayscale original to work with but VRS can output black & white which is what MV requires)

        • Use VRS for PDF to TIFF conversion enabled (with the license, VRS ignores the dpi/color mode conversion settings)

        • VRS all images

      • VRS Settings:

        • Turn off Advanced Clarity (it’s unnecessary for these electronically produced images. Note in some cases Advanced Clarify may help. 

        • Lower the Gray Gamma value (112 is a good place to start). This won’t necessarily create thickness where there is none, but it might restore some of the text’s original thickness.

        • Despeckle (try with height and width set to 2). 

        • Filter Enable = On.

        • Auto Brightness = On.

        • Filter Algorithm = Light Thicken.

          • These two settings will actually thicken the text, but probably a little. Realize, this will thicken ALL the text, even the text that is already thick, so the Thicken setting might be worth trying if Light Thicken isn’t enough.



NOTE: Adjusting and testing the VRS settings for each KIC destination configuration may be an iterative process.

Please see the full KIC configuration recommendations here 


3. Alternatively - have users use a non-IE browser such as Chrome, as the scaling APIs used in Chrome are up to date, and do not cause image quality degradation.

Applies to:  

Product Version
MarkView for Oracle 10.x