7 Replies Latest reply on Dec 4, 2012 7:14 AM by flyingj481

    low image quality

    JoJo-55 Level 1

      Why is the image quality so low although "lossless" is selected in settings?

        • 1. Re: low image quality
          VikramGaur Adobe Employee

          Hello,

           

          Welcome to Adobe Forums.

           

          Which version of Adobe Presenter are you using ?

           

          Which version of MS Office do you have ?

           

          Are you inserting an Image or Copying it ?

           

          Please elaborate your query, mention the workflow you are following.

           

          Thanks,

          Vikram

          • 2. Re: low image quality
            flyingj481 Adobe Community Professional (Moderator)

            If you are bringing an image into PPT and the forcing it to a smaller size (or larger), then you will have a quality loss due to the rescaling of the image. No quality setting can fix this.

             

            Use a program like PhotoShop to properly re-size the image and then bring it into PPT once it is the correct size. You should see an improvement in quality and a reduction in file size.

            • 3. Re: low image quality
              JoJo-55 Level 1

              Dear Vikram,

               

              I used Presenter8, Win7, 64bit and Office 2010 all with latest updates.

               

              Copying the image to Powerpoint or using the insertion procedure does not make a differnence.

               

              Please see the exported presentation

              http://www.vismedia.de/presenterimage/index.htm

               

              and the same presentation exported as pdf with good image quality

              http://www.vismedia.de/presenterimage/ImageQuality.pdf

               

              The images inserted for test are

              http://www.vismedia.de/presenterimage/quader.jpg

              http://www.vismedia.de/presenterimage/quader-72dpi.jpg

               

              Kind regards

              Klaus

              • 4. Re: low image quality
                JoJo-55 Level 1

                Dear Jorma,

                 

                I tried several options. Reducing the size improves the quality a bit.

                Please see the answere I wrote to Vikram including the links.

                 

                Thank you

                Klaus

                • 5. Re: low image quality
                  flyingj481 Adobe Community Professional (Moderator)

                  I used the image you provided and published three versions of it via Presenter 8.0.1.

                   

                  The lossless setting for image quality produced the worst result.

                   

                  http://realeyesconnect.adobeconnect.com/p6ur1ich3eq/

                   

                  The High Quality setting produced the best looking version of the image (and the largest file size oddly enough).

                   

                  http://realeyesconnect.adobeconnect.com/p6bly926qu0/

                   

                  The Medium quality setting produced an image that seemed acceptable, but noticibly lower in quality than the High setting.

                   

                  http://realeyesconnect.adobeconnect.com/p1t9fyfx3fi/

                   

                  I'd use the High Quality setting as that seems to yeild the best result for this image.

                  • 6. Re: low image quality
                    JoJo-55 Level 1

                    Hi Jorma,

                     

                    thank you for this simple solution, it's a bit curious that the lossless setting produces lower quality than high, isn't it?

                     

                    Like you proposed to do I reduced the resolution of images using PS before insertion to Powerpoint. I tested this procedure for some png images but for those inserted in higher resolution (downscaled in powerpoint) the export result (swf) looks better than the ones reduced in advance. In your answere you reported just the opposite, does this procedure maybe depend on filetype or else? Is the Presenter player able to take advantage of feeding in higher resolved images for situations where the exported presentation is displayed on bigger screens?

                     

                    Best

                    Klaus

                    • 7. Re: low image quality
                      flyingj481 Adobe Community Professional (Moderator)

                      Presenter will scale to fit any screen it is displayed on. low res images may show some pixelization when displayed on large, high resolution monitors.

                       

                      In the end, it comes down to what you are trying to achieve. The settings and quality of images used, will need to be set up for your intended audience. I usually stick with JPG images, as they are consistently reliable. So my experience with PNG images is limited.

                       

                      As to the lossless button, it is curious. Looking back at the documentation, it looks like the Lossless setting is intended to be better than the Low setting.

                       

                      From Presenter 8 documentation:

                       

                      High

                      The largest file size and highest quality image.

                      Medium

                      The best balance between file size and image quality.

                      Low

                      The smallest file size and lowest quality image.

                      Lossless

                      (available in Adobe Presenter 7.0.7 and later) High quality images that are embedded in SWF files. The size of SWF files is more than the ones that result from the ‘Low’ option.