Publisher PDF import: Instead of PNG, TIFF are mapped...

[Alibre Design]

Hello,

Affinity Publisher imports PDF well, but many images are mapped as TIF. Serif PagePlus X9 does this much better by mapping images as PNG.

The TIF images make the file more than 4x larger than PagePlus X9, which is bad:

Resource consumption in Affinity Publisher...

Resource consumption in PagePlus X9...

Where can I set that Affinity Publisher map images as PNG instead as TIF ?

 

Best regards,
André

Alibre-Design-Buch_P165-168.pdf

[Dan C]

Hi Alibre Design/André 

Thanks for your file - I can see that there's a difference between PPX9 & Affinity Publisher here, so I'll log this file with our developers as I'm unsure which app is doing the 'correct' thing.

I'll also log a related improvement for an option to be added to choose the image format, if this is possible then our developers will certainly consider this.

Many thanks for your report!

[Dan C]

Thanks for your patience, the below is a response from our developers - 

"The difference actually comes down to the fact that Affinity doesn't internally support palettized images. In the PagePlus screenshot, you'll note that images are reported as being 8-bit RGB, which is a format where 256 colours are used from a palette.
Because PP supported these throughout its rendering pipeline, we retained the underlying data on import. Affinity, by contrast, doesn't support palettes throughout its pipeline and so, for performance reasons, all such images are upconverted to 32-bit on load. The backing data is discarded and the size reported in resource manager is an "estimate" of how big the file would be if you saved it out. Since we can't tell how effective compression will be without actually compressing the data, this estimate is somewhat pessimistic (in practice it's actually the uncompressed size of the image data) and the real figure may be somewhat lower - although it still won't be as low as the original palettized data.

The reason the files are reported as TIFF is that, for simplicity, we treat all images without backing data as TIFFs because it is the only format which supports RGB, CMYK and mono images and handles transparency. We could report RGB images as PNG, but the estimated figures would still be as pessimistic."

I hope this clears things up

[Alibre Design]

Hi Dan

Thanks for your feedback!

I understand. But I would prefer PNG's instead of TIFF. If this is effectively not possible, I would like to know how to extract and link all TIFF images in the document.

How does that work in AP?

[Alibre Design]

Hello,

How can I extract and link all TIFF images in the document?

Like in this picture from PPX9...

Best regards,
André

[walt.farrell]

Use File > Open to open your PDF, then Document > Resource Manager.