Figure 1
The northern Kyushu region. A: The Japanese archipelago and northern Kyushu region are outlined in the red square; B: The northern Kyushu region and Fukuoka plain subregion utilized in the present study.
Table 1
Samples utilized in this study with corresponding traditional typological “type” and notes on the preservation of the vessel.
| VESSEL CODE | SURVEY # | TYPE | NOTES |
|---|---|---|---|
| T1 | 3 | Itazuke Ia (1) | Fair preservation |
| T2 | 3 | Itazuke Ia (2) | Slight lip paste reconstruction |
| T3 | 6 | Itazuke Ia (2) | No lip region |
| T4 | 6 | Itazuke Ia (2) | Sherd reconstruction |
| T5 | 3 | Itazuke Ia (2) | Fair preservation |
| T6 | 3 | Itazuke Ia (2) | Base sherd reconstruction |
| T7 | 6 | Itazuke Ia (1) | No lip region |
| T8 | 6 | Itazuke Ia (2) | Slight body paste reconstruction |
| T9 | 3 | Itazuke Ia (2) | Fair preservation |
Figure 2
A tsubo globular pot. The pronounced outward curvature of the lip and heart-shaped body connected to a slabbed base are characteristic of this style of pot in this region. (example shown here: Shimotsukiguma-Tenjinmori site, No. T5).
Figure 3
Early Yayoi period tsubo pots from the Tenjinmori site. Nine examples are utilized in this case study.
Figure 4
Morphometric mapping (MM) and sliced segmental extraction (SSE) workflow; from mesh manipulation, cloud manipulation, scalar field projection, and MM/SSE extraction.
Figure 5
The CloudCompare operating environment.
Figure 6
Orientation process using the “level” tool. A: An un-orientated vessel; B: Choosing three points for orientating the mesh; C: A vessel correctly base-orientated.
Figure 7
Sampling 3D point cloud from mesh data and the unrolling process. A: A vessel point cloud with 1,000,000 sampled points. B: An unrolled point cloud. C: An unrolled point cloud viewed from the side, with clarified curvature patterns.
Figure 8
Projection of scalar field on regular vs. unrolled mesh data. Unrolled data allows for the visualization of curvature of the full vessel.
Figure 9
Scalar field projection on unrolled point clouds. A: Standard blue > green > yellow > red color scale (blue refers to the region closest to the Y axis, in this case the body); B: “High contrast” color scale revealing different curvature patterns on both the body and lip/neck regions of the example vessel; C: 2D representation of the full unrolled cloud.
Figure 10
Sectional point cloud extracted using the “Filter points by value” tool. A: Choosing regions of particular interest; B: Extracting point clouds and applying separate scalar field values; C: Rotating and orientating the point cloud to visualize easily the detailed curvature of the vessel form.
Figure 11
Contour line extraction through polyline drawing. A: 5-mm steps between each open contour line; B: Contour lines are drawn on the extracted body cloud; C: Extracted contour lines showing the clear curvature of the body of the vessel.
Figure 12
Sliced segmental extraction of the whole-vessel form; white/dark red regions are areas of inward curvature, and green/light blue regions are areas of extreme outward curvature. A: A normal morphometric mapping output; B, C: Sliced 5-mm segments clarify the detailed curvature; D: Each sliced segment can be examined individually and exported as a separate mesh data file.
Figure 13
Morphometric mapping of sample T1. A: Base orientation; B: Lip orientation.
Figure 14
Sliced segmental extraction of sample T1. A: Base orientation; B: Lip orientation.
Figure 15
Six categorical regions of morphological importance on example vessels; descriptions of morphometric mapping are organized based on these six regions. A: Six morphological regions overlaid on a 2D line drawing of an example vessel; B: Six morphological regions overlaid on morphometric mapping.
Figure 16
Sample T1 MM and SSE output.
Figure 17
Sample T2 MM and SSE output.
Figure 18
Sample T3 MM and SSE output.
Figure 19
Sample T4 MM and SSE output.
Figure 20
Sample T5 MM and SSE output.
Figure 21
Sample T6 MM and SSE output.
Figure 22
Sample T7 MM and SSE output.
Figure 23
Sample T8 MM and SSE output.
Figure 24
Sample T9 MM and SSE output.
Figure 25
Example of a potential scoring system for mid-body region curvature patterns.