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Affinity publisher low JPG/PNG quality


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Hi @Ferdinando Traversa,

In the PDF export screen can you please click the More Options and on the new screen set the Rasterise option to nothing and turn off the Downsample images option and Allow JPEG compression and then enable the Use document resolution option and the PDF will export with the photos the same resolution as in your document.

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What exactly is the problem, can you specify it somehow?

Affinity Store (MSI/EXE): Affinity Suite (ADe, APh, APu) 2.4.0.2301
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10 minutes ago, Ferdinando Traversa said:

You can see from files I attached: if I export to jpg or I export to png it is very very low quality jpg or png file (also compared to pdf).

They look fine to me, and (I suspect) to Pšenda. Can you explain what looks low quality to you? Are there some specific areas with problems that you could point to?

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Looking at your attached images in Windows Photos I can see a colour change between PNG and JPG – especially noticeable in the logos (see the greens and blues in Wimimedia logo, for example).
The PDF is of a much better quality overall however so the issue is probably with your JPG/PNG export settings. (My attached screen-grabs show the difference between the PDF and PNG.)
If you can attach a screen-grab of your settings (including the “More...” dialog) it will make it easier to diagnose.

Annotation 2019-12-03 090218.png

Annotation 2019-12-03 090239.png

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In PDF, some images are embedded with huge resolution.
image.png.fe28f1c9af1b12b06fa8d7a7dcc7b114.png

So it is clear that they will render better in PDF than after their compression and degradation to 300DPI.
The fact, that a PDF file has 9MB, and an uncompressed PNG of only 1MB, is a clear proof that there is much more detailed data in the PDF.
Therefore, a significantly higher DPI must be used for adequate PNG/JPEG export quality.

Edit: Even in PDF there are some logos in a small DPI, and their quality is then poor compared to others.
image.thumb.png.62822e836949e8255eda4cda12790463.png

Affinity Store (MSI/EXE): Affinity Suite (ADe, APh, APu) 2.4.0.2301
Dell OptiPlex 7060, i5-8500 3.00 GHz, 16 GB, Intel UHD Graphics 630, Dell P2417H 1920 x 1080, Windows 11 Pro, Version 23H2, Build 22631.3155.
Dell Latitude E5570, i5-6440HQ 2.60 GHz, 8 GB, Intel HD Graphics 530, 1920 x 1080, Windows 11 Pro, Version 23H2, Build 22631.3155.
Intel NUC5PGYH, Pentium N3700 2.40 GHz, 8 GB, Intel HD Graphics, EIZO EV2456 1920 x 1200, Windows 10 Pro, Version 21H1, Build 19043.2130.

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As I wrote above, set Document to 600 or more DPI. The files will be significantly larger, but you will also have higher quality.

Affinity Store (MSI/EXE): Affinity Suite (ADe, APh, APu) 2.4.0.2301
Dell OptiPlex 7060, i5-8500 3.00 GHz, 16 GB, Intel UHD Graphics 630, Dell P2417H 1920 x 1080, Windows 11 Pro, Version 23H2, Build 22631.3155.
Dell Latitude E5570, i5-6440HQ 2.60 GHz, 8 GB, Intel HD Graphics 530, 1920 x 1080, Windows 11 Pro, Version 23H2, Build 22631.3155.
Intel NUC5PGYH, Pentium N3700 2.40 GHz, 8 GB, Intel HD Graphics, EIZO EV2456 1920 x 1200, Windows 10 Pro, Version 21H1, Build 19043.2130.

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Hi @Ferdinando Traversa  think the problem is due to the very small size of your original logo, shown here on the left, 79x78 pixels is too small for a quality output. It was originally at 78x78 at 600dpi and it has been enlarged to match the others, unfortunatley due to the lack of detail in the original it has deteriorated when enlarged.  Have you got a higher resolution logo?

When you enlarge images in Publisher the resolution reduces, reducing their size increases it. Your sharper logos were all larger to start with. 

When you have resolved the original size issue and used a higher resolution logo your exports should look good.

 

 

Edit: Even in PDF there are some logos in a small DPI, and their quality is then poor compared to others.
image.thumb.png.62822e836949e8255eda4cda12790463.png

 
 
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Unfortunately you didn't insert the original file, so I had to load the PDF.
Its document size is 2400x1256px, which is twice the size of your PNG and JPG export, which will of course result in significantly worse results.

Fonts in PDF is fonts - vector. In PNG/JPG is bitmap. It will always give a worse result.

Edit: rescale your PDF to 2400dpi, and export to PNG. File has 35MB.
Left original PDF, right exported PNG.

image.thumb.png.31b84c4f60a11ddbf90b5276262af251.png
image.thumb.png.a2a61efb1a21f3f0b7fbdd997adbf906.png

Affinity Store (MSI/EXE): Affinity Suite (ADe, APh, APu) 2.4.0.2301
Dell OptiPlex 7060, i5-8500 3.00 GHz, 16 GB, Intel UHD Graphics 630, Dell P2417H 1920 x 1080, Windows 11 Pro, Version 23H2, Build 22631.3155.
Dell Latitude E5570, i5-6440HQ 2.60 GHz, 8 GB, Intel HD Graphics 530, 1920 x 1080, Windows 11 Pro, Version 23H2, Build 22631.3155.
Intel NUC5PGYH, Pentium N3700 2.40 GHz, 8 GB, Intel HD Graphics, EIZO EV2456 1920 x 1200, Windows 10 Pro, Version 21H1, Build 19043.2130.

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9 minutes ago, Pšenda said:

Unfortunately you didn't insert the original file, so I had to load the PDF.
Its document size is 2400x1256, which is twice the size of your PNG and JPG export, which will of course result in significantly worse results.

Fonts in PDF is fonts - vector. In PNG/JPG is bitmap. It will always give a worse result.

That is weird...on my system the file has dimensions of 288x150pt O.o When I opened the PDF & checked the spread setup that was the size of the document with a dpi of 600

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59 minutes ago, Murfee said:

That is weird...on my system the file has dimensions of 288x150pt O.o

Yes, but in pixel is? :-)
Change Document Units in Document Setup.

Affinity Store (MSI/EXE): Affinity Suite (ADe, APh, APu) 2.4.0.2301
Dell OptiPlex 7060, i5-8500 3.00 GHz, 16 GB, Intel UHD Graphics 630, Dell P2417H 1920 x 1080, Windows 11 Pro, Version 23H2, Build 22631.3155.
Dell Latitude E5570, i5-6440HQ 2.60 GHz, 8 GB, Intel HD Graphics 530, 1920 x 1080, Windows 11 Pro, Version 23H2, Build 22631.3155.
Intel NUC5PGYH, Pentium N3700 2.40 GHz, 8 GB, Intel HD Graphics, EIZO EV2456 1920 x 1200, Windows 10 Pro, Version 21H1, Build 19043.2130.

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You're welcome. I like Alberobello :-)

Affinity Store (MSI/EXE): Affinity Suite (ADe, APh, APu) 2.4.0.2301
Dell OptiPlex 7060, i5-8500 3.00 GHz, 16 GB, Intel UHD Graphics 630, Dell P2417H 1920 x 1080, Windows 11 Pro, Version 23H2, Build 22631.3155.
Dell Latitude E5570, i5-6440HQ 2.60 GHz, 8 GB, Intel HD Graphics 530, 1920 x 1080, Windows 11 Pro, Version 23H2, Build 22631.3155.
Intel NUC5PGYH, Pentium N3700 2.40 GHz, 8 GB, Intel HD Graphics, EIZO EV2456 1920 x 1200, Windows 10 Pro, Version 21H1, Build 19043.2130.

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