low image quality

[JoJo-55]

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

[VikramGaur]

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

[JoJo-55]

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

[Jorma_at_CoSo]

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.

[JoJo-55]

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

[Jorma_at_CoSo · Accepted solution]

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.

[JoJo-55]

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

[Jorma_at_CoSo]

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.