Acrobat image compression

Glenn McDowall

Well-known member
I might be putting 2 and 2 together and getting 5 but, is Dov inferring that if you place an LZW TIFF into Indd and Export PDF you get ZIP or JPEG compression.

Dov also said for storage of Masters; "For that purpose, personally, I typically use ZIP-compressed TIFF with ICC color-managed 16 bits colorant per pixel storage coming out of Camera Raw!"
+1 for me
I'm sort of split between dng and 16bit tif for my personal masters. As I see it the dng is only as good as RAW+XMP in that the XMP can reference settings that only lightroom and Camera Raw can understand such as Dehaze. I'm curious if you think you could recover highlights from a 16bit TIF as well as you can from the 10-12bit RAW?

Joe, you should take a look at the De Jpeg Neural filter in Photoshop, and ABC you should script its use there and back again into Pitstop, along with extending bleed by adding to the canvas using content aware fill !
 

Dov Isaacs

Well-known member
I might be putting 2 and 2 together and getting 5 but, is Dov inferring that if you place an LZW TIFF into Indd and Export PDF you get ZIP or JPEG compression. …
I am neither saying nor inferring that. The compression type and quality setting for PDF export is totally independent of the compression type and quality of the placed images in InDesign (or Illustrator). That having been said, although PDF does allow for LZW image compression, virtually no one uses LZW for PDF anymore (none of the PDF/X or PDF/A subset PDF standards permit it).

- Dov
 

Joe

Well-known member
Joe, you should take a look at the De Jpeg Neural filter in Photoshop, and ABC you should script its use there and back again into Pitstop, along with extending bleed by adding to the canvas using content aware fill !

Thanks for the tip. I would however prefer people stop murdering PDF's with Photoshop.
 

Dov Isaacs

Well-known member
Thanks for the tip. I would however prefer people stop murdering PDF's with Photoshop.

Similarly, we wish that people stop murdering PDF files by pretending that Adobe Illustrator is a PDF file editor. Over the years, some of the most egregious problems that we have seen in PDF print publishing workflows have occurred when PDF files (other than those created by the same version of Illustrator and not subsequently modified) have been opened and resaved from Illustrator (even without any changes having been made) either “just to check things out” or “to make minor fixes.” Both Adobe Illustrator and Photoshop are not, repeat not, repeat yet again not PDF file editors.

- Dov
 
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Joe

Well-known member
Similarly, we wish that people stop murdering PDF files by pretending that Adobe Illustrator is a PDF file editor. Over the years, some of the most egregious problems that we have seen in PDF print publishing workflows have occurred when PDF files (other than those created by the same version of Illustrator and not subsequently modified) have been opened and resaved from Illustrator (even without any changes having been made) either “just to check things out” or “to make minor fixes.” Neither Adobe Illustrator nor Photoshop are not, repeat not, repeat yet again not PDF file editors.

- Dov

Agree wholeheartedly!
 

steppy

Well-known member
If your rips are over a decade old, did you ever look at the speed improvement if you upgraded?
Seems you have to jump through hoops to get things to work, and this is only going to get worse as PDF 2.0 and PDF/X-6 come on stream.
Maybe you can build an ROI for an upgrade?
Andrew:

Thanks for following up on this and I of course agree, upgraded RIPs would be terrific! Sadly, even pre-covid, getting approval for investment in capital equipment was/is always a daunting task; I keep trying.

One of our vendors has given notice that our main press and RIP will no longer be supported. So in 6-8 months we'll have to get something new.

Regardless, maybe it's old-school; IMO whatever the equipment, it never hurts to have files and workflow optimized for maximum efficiency. Then of course with more capable equipment one can coast a bit from time to time.

Be well.

stephen
 

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