7 Replies Latest reply on Nov 1, 2013 8:30 AM by whit2515

    Blurred Images in ePub export to Kindle.

    whit2515

      Blurred Images in ePub export to Kindle.

      I am using InDesign to create the ePub. My images are stock charts. All charts are high resolution in InDesign. No issues with images in InDesign. When I view the ePub in Adobe Digital Edition and in Kindle Previewer the images are blurred as if they lost the high resolution setting.

      The images are all jpeg. This is book 1 of 25 books with 34 chart images per book. Any ideas on a solution is appreciated.

        • 2. Re: Blurred Images in ePub export to Kindle.
          Steve Werner Adobe Community Professional & MVP

          What version of InDesign? If you have InDesign CS5.5 or higher, select the chart and choose Object > Object Export Options, where you can set the resolution when the chart is rasterized for EPUB.

          • 3. Re: Blurred Images in ePub export to Kindle.
            whit2515 Level 1

            I use Indesign CC. I use Place to add the text, Then use Place to insert

            the charts and anchor them to text in the area, center charts on page.

            Display Performance - I use High Resolution. The chart are screenshot in

            png. Before inserting the charts I convert the charts to jpeg in Photoshop

            and save them to a file. I then Place the charts in InDesign. Save the

            InDesign file. Exit the InDesign file and then reload the file. The chart

            images are blurred. I go to Display Performance to change from Typical to

            High Resolution. The chart images all change to High Resolution.

            Everything looks good. I then export to ePub. I use Adobe Digital Edition

            to view the ePub. The chart images are blurrred. I then run the Kindle

            Previewer and the chart images are blurred there also.

             

            How can I lock the chart images to high performance and have it maintain in

            the epub file?

            • 4. Re: Blurred Images in ePub export to Kindle.
              Steve Werner Adobe Community Professional & MVP

              You have a pretty crazy workflow, and you're switching file formats multiple times. I'm sure it's the crazy workflow that's causing the resolution loss, but I can't really follow it. Where are the charts coming from? Are they originally vector (like AI from Illustrator) or rasterized?

              • 5. Re: Blurred Images in ePub export to Kindle.
                Eugene Tyson Adobe Community Professional & MVP

                Your confusion seems to lay with the "Display Performance" in InDesign.

                 

                InDesign's display performance is only important to InDesign.

                 

                When you place a file into InDesign it doesn't place the actual image. It creates a proxy (thumbnail) of the image to be viewed in the layout only.

                 

                InDesign links to files - to see the true resolution of an image you need to go the Window>Info and select the image and the information is visible in the Info panel.

                 

                InDesign comes with 3 flavours of preview of the thumbnails it creates, Fast, Typical and High - these 3 viewing settings are only to give you a flavour, Fast shows you a gray box and there's an image there, Typical shows a lo-res proxy, and High shows a high quality thumbnail version of your image.

                 

                These are not reflective of the true quality of the images.

                 

                 

                All your images are PNG which are perfectly fine to place in InDesign - you are actually losing quality in your images by converting everything to JPEG - as JPEG is a lossy file format - where as PNG is lossless.

                 

                JPEG is much better for photographs (actual photos with lots of colour information)

                 

                PNG is much better for solid blocks of colour and for Charts, Diagrams, line Drawings, Screenshots - PNG is preferred over JPEG.

                 

                 

                 

                But all this changing to High Resolution in InDesign before Output does nothing reflective in the Output.

                 

                The true quality of your images lies in the Information within the file - which is visible on Window>Info

                • 6. Re: Blurred Images in ePub export to Kindle.
                  whit2515 Level 1

                  Maybe the workflow below will give you a better idea:

                   

                  Workflow:

                   

                  1.      Open InDesign

                   

                  2.      Insert Word Document Text.

                   

                  3.      Insert Chart Images(jpeg) from picture folder and anchor them to

                  text area and center chart images on page

                   

                  4.      Chart Images – change typical to high resolution

                   

                  5.      Save InDesign File

                   

                  6.      Export InDesign File to create ePub file

                   

                  7.      View ePub in Adobe Digital Edition – Charts are blurred (lost high

                  resolution setting- maybe)

                   

                  8.      Run Kindle Previewer – Chart Images blurred (lost high resolution

                  setting)

                   

                  If you have a better workflow or the above workflow is incorrect, please

                  indicate what I should be doing to correct the blurred image issue.

                   

                  Thanks,

                   

                  David

                  • 7. Re: Blurred Images in ePub export to Kindle.
                    whit2515 Level 1

                    Thanks, I will try pgn format. I have converted  a word document using the

                    charts to kindle.  My only issue with ms word is i can't seem to anchor the

                    chart image to a centered area of the page.  I thought I would use InDesign

                    because it seem to do a better job and there are more things I can do with

                    Indesign.

                     

                    Thanks,