ICEpdf
  1. ICEpdf
  2. PDF-643

PDF/A Document - lack of rendering quality since v5.x

          Details

          • Type: Bug Bug
          • Status: Closed
          • Priority: Major Major
          • Resolution: Fixed
          • Affects Version/s: 5.0, 5.0.1, 5.0.2, 5.0.3
          • Fix Version/s: 5.1
          • Component/s: None
          • Labels:
            None
          • Environment:
            Win XP

            Description

            Unfortunatly since V5.X of ICEpdf Pro the rendering quality of our documents decreased. There are extremely frayed letters and sometimes it's impossible to read the document with 100% zoom. Please have a look at the attached sample file.
            1. adobe.jpg
              167 kB
            2. icepdf.jpg
              181 kB

              Activity

              Ascending order - Click to sort in descending order
              Stefan Franz created issue -
              Stefan Franz made changes -
              Field Original Value New Value
              Attachment 2404120380S55424042012203943LVS111001.pdf [ 16391 ]
              Stefan Franz made changes -
              Attachment 2404120380S55424042012203943LVS111001.pdf [ 16391 ]
              Stefan Franz made changes -
              Attachment sample.pdf [ 16392 ]
              Stefan Franz made changes -
              Attachment sample.pdf [ 16392 ]
              Hide
              Permalink
              Stefan Franz added a comment -

              Hi Patrick, as there is no working access restriction for uploaded files I removed the attachment. I will send it to you by email. Stefan

              Show
              Stefan Franz added a comment - Hi Patrick, as there is no working access restriction for uploaded files I removed the attachment. I will send it to you by email. Stefan
              Hide
              Permalink
              Patrick Corless added a comment -

              The document in question uses a Type 3 font where each glyph is made up of small TIFF image. In 5.x we changed the defaults for the graphics rendering hints. The 4.x rendering quality should be achievable in 5.x by using the system property -Dorg.icepdf.core.screen.interpolation=VALUE_INTERPOLATION_BICUBIC.

              Show
              Patrick Corless added a comment - The document in question uses a Type 3 font where each glyph is made up of small TIFF image. In 5.x we changed the defaults for the graphics rendering hints. The 4.x rendering quality should be achievable in 5.x by using the system property -Dorg.icepdf.core.screen.interpolation=VALUE_INTERPOLATION_BICUBIC.
              Hide
              Permalink
              Stefan Franz added a comment -

              sample file viewed with adobe reader

              Show
              Stefan Franz added a comment - sample file viewed with adobe reader
              Stefan Franz made changes -
              Attachment adobe.jpg [ 16400 ]
              Hide
              Permalink
              Stefan Franz added a comment -

              sample file viewed with icepdf 5.0.3

              Show
              Stefan Franz added a comment - sample file viewed with icepdf 5.0.3
              Stefan Franz made changes -
              Attachment icepdf.jpg [ 16401 ]
              Hide
              Permalink
              Stefan Franz added a comment -

              Thanks Patrick;

              The hint you gave me worked and the letters will be rendered much smoother. Although there is still a big difference between adobe reader and icepdf in rendering quality. Are there any other settings to improve the rendering quality?

              Stefan

              Show
              Stefan Franz added a comment - Thanks Patrick; The hint you gave me worked and the letters will be rendered much smoother. Although there is still a big difference between adobe reader and icepdf in rendering quality. Are there any other settings to improve the rendering quality? Stefan
              Hide
              Permalink
              Patrick Corless added a comment -

              There are currently no other settings to enhance the rendering of Type 3 glyphs. I'll make a comment on PDF-637 as there might be something we can add when dealing with small images.

              Show
              Patrick Corless added a comment - There are currently no other settings to enhance the rendering of Type 3 glyphs. I'll make a comment on PDF-637 as there might be something we can add when dealing with small images.
              Hide
              Permalink
              Patrick Corless added a comment -

              Marking as resolved. Further work has been done to help improve the scaling of type 3 font glyphs.

              The following image reference modes can be used:

              -Dorg.icepdf.core.imageReference=smoothScaled
              or
              -Dorg.icepdf.core.imageReference=scaled

              Show
              Patrick Corless added a comment - Marking as resolved. Further work has been done to help improve the scaling of type 3 font glyphs. The following image reference modes can be used: -Dorg.icepdf.core.imageReference=smoothScaled or -Dorg.icepdf.core.imageReference=scaled
              Patrick Corless made changes -
              Status Open [ 1 ] Resolved [ 5 ]
              Fix Version/s 5.1 [ 10675 ]
              Resolution Fixed [ 1 ]
              Patrick Corless made changes -
              Status Resolved [ 5 ] Closed [ 6 ]

                People

                • Assignee:
                  Patrick Corless
                  Reporter:
                  Stefan Franz
                • Votes:
                  0 Vote for this issue
                  Watchers:
                  2 Start watching this issue

                  Dates

                  • Created:
                    Updated:
                    Resolved: