topic Re: Published PDF - embedded jpg compression too strong. in Documentation

Published PDF - embedded jpg compression too strong.

Anonymous — Fri, 19 May 2023 20:13:27 GMT

Hello,
In my current project I'm publishing PDF A3 page with single JPG image on it. It's high quality screenshot converted from PNG, so in original JPG there are no artifacts around edges at all.

However, when I publish the page in AC17, resulting amount of artifacts is incredible. Looks like Photoshop quality 3/12 or even worse.

I remember, this was not an issue while publishing to PDF in older version. (Only in JPG publications, which were therefore useless.)

Workaround: Converting JPG to TIF helps but also needlessly increases file size.

Did you also encounter this?

Thank you, guys!
-jonas

Re: Published PDF - embedded jpg compression too strong.

Thomas Holm — Tue, 29 Nov 2016 18:23:54 GMT

I'd like to bump this topic.

Is it possible to control image compression when publishing layouts with placed images some way?
I just noticed that when I Print to pdf a certain layout directly from Archicad, the resulting pdf is about 16.5 MB. When I Publish it, it's compressed to 732K. That's compressed to 1/20 of the original size. (Please note, the original jpg image that I placed on the layout was 6.2 MB - counted that way the compression was just to 1/12)

The quality difference is noticeable while not extreme. Seems like Archicad's compression method is good. But still, sometimes I want higher quality.

Jonish wrote:
Hello,
In my current project I'm publishing PDF A3 page with single JPG image on it. It's high quality screenshot converted from PNG, so in original JPG there are no artifacts around edges at all.

However, when I publish the page in AC17, resulting amount of artifacts is incredible. Looks like Photoshop quality 3/12 or even worse.

I remember, this was not an issue while publishing to PDF in older version. (Only in JPG publications, which were therefore useless.)

Workaround: Converting JPG to TIF helps but also needlessly increases file size.

Did you also encounter this?

Thank you, guys!
-jonas

Re: Published PDF - embedded jpg compression too strong.

Katalin Borszeki — Tue, 17 Jan 2017 15:26:46 GMT

Hi All,
In ARCHICAD 18, we implemented new PDF Options. Since that version, it is possible to save any curve with its own resolution and the Image resolution independently, and there are some other features as well. For further information, please visit the pertaining article of the Help Center: http://helpcenter.graphisoft.com/?p=35346
If the issue (saving PDF and publishing PDF with the same settings results in different PDF size) still exists in ARCHICAD 18 or a newer version, please save a PLA version of the plan and the PDFs saved and published from this file. You can use the GRAPHISOFT ShareFile site to upload your files to: https://graphisoft.sharefile.com/r-r3a6df9df24f42279
Please send me a PM if you upload a file, Best,

Re: Published PDF - embedded jpg compression too strong.

Thomas Holm — Thu, 19 Jan 2017 19:16:20 GMT

Thanks Katalin for your answer!

When I sent my post, I was on Archicad 18. The Help file you quoted gives the options
"Retain lossless image compression..."
or
"Compress all images: All images will be converted to JPG format, which entails a compression to 80%"

In my example, it seems the compression applied by Archicad 18 was not to 80% but by 80% (that is, to 20% of the original size).
I would like to have a bit more control over compression rate than these very different extremes, please. Maybe in Archicad 21?