Reality Check – We accept your challenge Mr Zullo

Reality check has challenged Mr Zullo

What will Zullo do? He can chose to show how a ‘criminal investigation’ deals with information that contradicts its findings, or he can ignore it.

Either way, Zullo is faced with quite an unfortunate situation of his own creation.

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The Cold Case Posse – Failed conclusions March 1 2012

— Or the end of a ‘god of the gaps’ argument —

The Cold Case Posse released the following document on March 1, 2012 as a preliminary release of their findings. In it, its experts outline how they reached a conclusion of “forgery”. Note that they never really identified a ‘forger’ other than by claiming that regular scanning processes would not create specific artifacts.

Zullo appears to have understood this when he issued a challenge to show how a simple workflow would indeed create artifacts similar to the ones found in the WH Long Form Birth Certificate.

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John’s experiment

john: I did at Staples on the big Xerox Color Copier (Not WorkCenter (sic) however). The result was not even remotely like Obama’s birth certificate

So you did it on a non WorkCentre Xerox and the relevance of this is exactly what? This is like the drunk looking for his keys under the street light because it was too dark to see where he had dropped them…

Update: See John’s file at Dr Conspiracy where he created a 13 Mb file created on a Xerox Color 550 multi-function copier/printer. He did not select the email scan option however.

Let’s hope John does better next time. But at least he is trying. Kudos to John. The image is 300 ppi single layer flatedecode

News Coverage

Dr Conspiracy has another hilarious posting about the competence of the Cold Case Posse and points us to some of the traction the Xerox forgery workflow is getting.

Even John understands how damaging this is to the Cold Case Posse. And I am glad that I have managed to get the Cold Case Posse to finally take their work a bit more seriously than having some people stare at an Adobe Illustrator window.

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WH LFBC and Xerox 7655 Preview PDF – Side by Side

Status Strong

The raw PDF mimicks the WH LFBC PDF to a remarkable level of similarity. This was for the Preview saved Xerox scan on a 7535 Xerox WorkCentre.

Before I continue, I do have to point out that Preview reorders and renames the Objects, removes any JBIG2 encoding as well as other non PDF 1.3 supported features. Therefore, the similarity between two Preview created documents may be strongly correlated. However, I will show how for example, using a ‘forged’ pdf by Polland, the Preview saved version contains many differences.

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Scoresheet

I am tracking a score sheet for features explained versus objections raised.

Confirmation Documents

August 28 A sad day as I have decided to no longer allow Hermitian to submit comments on this blog as he has now, several times accused me of behavior for which he has no evidence (hinting that I may be the forger, work for Obama, that I withhold data or manipulate data and other non sequiturs). I feel saddened because, despite his short comings, he did serve a useful purpose. I wish him well and will continue to address issues he raises, to help him understand better why the Xerox workflow stands unassailed. Thank you Hermitian for your efforts to debunk the work flow, helping further strengthen it.

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Xerox 7655 PDF – Layers and scaling/rotation

I am using Adobe Illustrator to simplify matters for some people who do not appreciate low level tools. For those people: You can click on the image and bring up a larger version.

As various other people have documented, the WH document contains several monochrome bitmaps and a single JPEG encoded background. It’s these features which caused some concern amongst those who insist that President Obama’s LFBC must be fraudulent. I can now share with you that the Xerox 7655 PDF reproduces these features.

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Butterdezillion – Some good questions

From the FreeRepublic we receive some good feedback from a poster named Butterdezilion.

Butterdezilion: If the Xerox machine is substituting exact replicas every time a certain “blob” (such as a box) appears, then that should happen with every box, every letter, etc. If the Xerox is switching 6’s for 8’s then where are those numbers switched around in the White House PDF?

A good question but as I have shown and found out, the Mixed Raster Compression is all but exact as it appears to be extremely sensitive to small variations. I have seen examples with anywhere from 4 to 17 foreground images. The same for JBIG2, it is based on how similar the two blobs, such as a box are, and in the samples I have, I have found JBIG2 to fail to capture the boxes, but it does capture other letters.

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Xerox 7655 – AP Copy scanned

I took the high resolution AP JPEG which I had extracted from the PDF and had it run through the Xerox scanner. The reason is that this document was not JBIG2 compressed and did not show identical characters. So what would Xerox do with it. The results are not surprising to most of us. Note that every time you repeat the scan you will get different results, often quite different.

First the layers. Note how, like with the other Xerox scans, it opens up in ‘landscape’ mode.

AP Layers Continue reading

Xerox 7655 – Clipping path and objects

The following three images show the ‘raw’ Xerox file, which has no clipping path at the top level and the Preview saved version which shows that Preview added a clipping path. Not also how Illustrator cannot properly deal with the Rotate annotation and shows the document sideways.

Xerox No Clipping Path. Objects Highlighted

Layers expanded no previewAfter rotating the document and saving it, the preview version shows an additional clipping path, just like in the WH LFBC PDF

Xerox Preview saved – Clipping path turned on

clipping pathXerox Preview saved – All objects in the Xerox  file

objects

Xerox 7655 – Links

The Xerox scan shows objects that are scaled 24% and 48% and rotated -90 degrees. And yes, items do scale as they are of different resolutions. The cold case posse, unaware of how PDF’s work and how MRC can lead to such artifacts, jumped to the conclusion that ‘items will not scale at different sizes during a scan’. Funny how that is so easily disproven, as anyone familiar with MRC could have predicted. In fact, I have previously explained the 24/48% scaling and it is trivial once you understand how PDF’s work… Hint: 72/300 and 72/150 is what exactly?…

Mara Zebest: Figure 23 shows the Link Information for the Onaka stamp object. The important focus has to do with the scale information which shows the object was scaled 24% and rotated -90°. Most of the links show similar scale information except for the background pattern. Figure 24 shows the Link Information dialog box which indicates the background pattern object has been scaled at 48% (instead of 24%). Again, this inconsistency is another indicator of image manipulation that refutes the OCR naysayer argument. If the document is scanned, regardless of whether OCR software was used or not, there is still a consistency in the scanning process (which is not present in this document). Items will not scale at different sizes during a scan.

WH7655_48WH7655_24

Xerox 7655 – Layers

Just as Mara Zebest and others have shown for the White House Long Form Birth Certificate, the Xerox 7655 scan also contains layers and a clipping path.

Zebest: In addition to the nine sub-layer objects, a clipping path is at the top of the sub-layer list. The clipping path groups all the remaining sub-layers below.

Mara also may want to revise her claim that:

Zebest: At the risk of sounding like a broken record, this is not normal, unless the document has been compiled digitally.

Technically speaking, she is correct, the document was compiled digitally by combining foreground layers with a background layer, but it was all done by the software.

WH7655Layers

The Xerox ‘forger’

Gorefan provided a link to an article showing how a Xerox WorkCentre can actually become a ‘forger’. The issue is the use of JBIG2 compression which takes shapes that look similar and stores them as a single image, leading to identical shapes. If JBIG2 is too aggressive, it may replace letters, or in this case numbers, with the wrong shape.

In other words, a Xerox WorkCentre can actually be a ‘forger’

Xerox 7655 Overview Picture

The following image is a composite created by scanning the WH LFBC using Xerox WorkCentre 7655 upside down using the automatic feeder. The resulting file was opened in Preview, the image rotated 180 degrees and printed to PDF. The resulting PDF was opened in preview, the layers unlocked and moved to the side. In addition, a close up of the signature was ‘blown up’ to show how the background layer, not surprisingly, has filled in some of the white that resulted from the separation of the background and foreground layers.

Note how for example the signature block is fully separated.

WH7655USDRotPrevV1_v2.PDF

WH 7655 Experiments

I am getting closer to having all the necessary data and images to make my case. Since it makes sense to do a final confirmation of one’s hypotheses, I decided to print out a better version of the WH LFBC (with halos) and have them run through a Xerox WorkCentre 7655 Scanner.

I performed three successive scans, once with the document the righ-side-up, once with the document upside-down USD. The USD versions were rotated 180 degrees and printed using Preview (USDRotPrev).

The Mixed Raster Compression is not perfect but it consistently recognizes the signature block, the date stamp (2011) and the mostly text. All jpg files contain the ‘YCbCr’ comment tag.

[UPDATE: I ran across an interesting factoid. If you use the feeder upside down, you get a different behavior than if you place the document upside down on the platen glass. So I did a final experiment WH7655USDFed.pdf. I realized the possibility when the .pdf’s failed to open sideways in Illustrator. Now I know why…]

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