Fig 1.
An example of (A) a projection and (B) a sinogram of the Antikythera Mechanism. In 1(A), the Mechanism can be seen in the top half of the image, along with an Allen key which was added as a known target and support structures. The Allen key and support structures are responsible for the faint, narrow lines in the sinogram (1(B)).
Fig 2.
Magnified view of sinogram, showing (A) steps due to missing projection and (B) the flattened sinogram after correction for missing projections.
Fig 3.
Percentage of pixels that exceed a threshold of mean + 5.3 standard deviations.
A cluster of outliers can be seen around projection 950.
Fig 4.
A magnified image of part of fragment A showing gear wheel b3, reconstructed using four methods to compensate for the missing projections.
Fig 4A does not correct for missing projections; Fig 4B erroneously assumes 27 missing projections as had been previously assumed; Fig 4C correctly takes 25 missing projections and replaces the missing projections with grey images with a value of 64,000; Fig 4D uses a weighed mean of the projections on either side of the missing projection.
Fig 5.
The 223-lunar month Saros Dial.
Red text is traced from data; blue reconstructed from context; green is uncertain. Reproduced with permission from [6].
Fig 6.
Deciphering eclipse times for Glyphs 13 and 125 on the Saros Dial.
The X-ray CT images were reconstructed assuming 27 and 25 missing projections. Annotations shown in orange were traced from the data; those in blue (highlighted with a box) were inferred from the data or context and those in green (with a box) are of uncertain interpretation. The diagonal lines in some of the X-ray CT images are the result of dead pixels in the detector.