Butterdezillion questions

Butterdezilion I’m scrambling like crazy to get a million things done. So if you or anybody else can double-check my understanding of this, it would be very helpful.

I will see what I can do

Butterdezilion Number substitutions happen on what machines? Do they happen on the default setting for the machine, or do you have to lower the quality and file size to get number substitutions? Did Xerox set up warnings for the user to know that substitutions could occur with those particular settings?

Yes, there were warnings but not always obvious. Xerox released a list of affected scanners

Butterdezilion What settings are required to create an automatic clipping mask that takes off the outer edges of the scanned document? What settings create multiple layers, and are the layers created reproducible each time, or are they seemingly random? For instance, you lay the paper on the bed of the scanner. Then you press scan 5 different times, one right after the other, changing nothing and not even opening the lid of the scanner. Do all 5 scans give you the same layers – a reproducible result you would expect from a machine carrying out exact algorithms in a controlled setting?

No, they do not repeat between scans even if you leave the document on the scanner. The layers are not random as the obvious ones repeat: Signature, date stamp(s). The algorithm is susceptible to minor variations in how a color is interpreted and once a difference happens, its effects can cascade across the object. The settings are the ‘default’ setting on the machine but they can be changed by the administrator I presume. In some instances, the Xerox actually created the same mysterious speckled images that so far had remained unexplained. It is actually a known issue. Good thing is that its effects remain mostly invisible to the human eye.

Butterdezilion If you save a scan on the 7655 without previewing it, is the saved file different than if you preview it on the 7655 before saving it? If you send the scan directly in an email is it in PDF format? If they open it on a PC will they be able to move around pieces of content? If they open it on a Mac will they?

Yes, they are very different. The Xerox created file has a lot of differences with the final document, most notably, the JBIG2 compression. Since Preview saves it to a lower PDF standard (1.3) it cannot create the same file. The resulting files however look extremely similar at the PDF object level. The ability to move around objects depends on the software. Illustrator does it both on Mac and Windows.

Butterdezilion If you import a digital file to the copier does the copier make layers out of a digital file as well, before printing it?

I am not sure if the copier supports this workflow. When printing, the computer creates a printing stream and typically does not send the document across the network. To a printer, there are just no layers. Remember that the foreground objects are just bitmasks that get printed on top of the background.

8 thoughts on “Butterdezillion questions

  1. I don’t know if you saw this by the German researcher:

    http://www.dkriesel.com/en/blog/2013/0811_all_three_compression_modes_mangling_numbers_on_xerox_workcentre_7545

    Apparently it isn’t just the “normal” setting that changes the numbers and there is an unconfirmed report that the 7655 is one of the models with the problem.

    And here are the settings he used but in German (LOL):

    http://www.dkriesel.com/en/blog/2013/0811_all_three_compression_modes_mangling_numbers_on_xerox_workcentre_7545

  2. It is funny that the vast majority of folks commenting at FR do not have a clue about compression or what the Xerox is doing but they are absolutely convinced the LFBC was a forgery.

  3. ” If you import a digital file to the copier does the copier make layers out of a digital file as well, before printing it?”
    I had a thought about this but along these lines. Bear with me.
    – The PDF is a scanned construction of different compressed jpegs.
    – The PDF is sent to the printer and printer interprets this as such.
    – Therefore any printout of Obama’s PDF would be a print out of a bunch of jpegs all constructed together.
    – When the printout is scanned, the scanner whether it be a Xerox or not would scan the print out as interpreted previously.
    Now take an original hard copy Hawaii birth certificate.
    – It is an original document.
    – when it is scanned it interpreted at such.
    – Therefore a PDF of an original BC will be far more realistic then as scan of a printed out PDF.

    That’s why the original BCs are some important to the CCP.

  4. ” If you import a digital file to the copier does the copier make layers out of a digital file as well, before printing it?”
    I had a thought about this but along these lines. Bear with me.
    – The PDF is a scanned construction of different compressed jpegs.

    Nope. One jpeg and multiple bitmaps

    – Therefore a PDF of an original BC will be far more realistic then as scan of a printed out PDF.

    That’s why the original BCs are some important to the CCP.

    But they claimed that it was 100% forged, now they want to see the original?.. You say all this with a straight face John?

    What a tool

  5. The original can be seen by:
    “A person whose right to inspect or obtain a certified copy of the record is established by an order of a court of competent jurisdiction;”–Hawaii Revised Statutes 338-18(b)(9).

  6. To: John Henderson

    The have been at least a half a dozen lawsuits in Hawaii to try and get such a court order. They all fail because the plaintiff did not have a tangible interest.

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