Digital OperationsScanningThe first step in our digital operations is the capturing of surface data. We employ several different methods for scanning objects. For most models we use an optical laser. A planar series of scans is performed, gathering high resolution information from the surface of a model. Typically a data point is gathered every 20 thousandths of an inch, millions of data points are collected in order to accurately scan a two foot tall model. A tremendous amount of information is necessary to sufficiently capture all of the intricacies and nuances of a sculpture. Any size model, of any shape, can be scanned in this manner; both extremely large and complex models must be disassembled to be scanned. If the original can not be cut apart, then often a rubber mold is pulled and a plaster copy is made, thereby preserving the original. For even greater detail, necessary when dealing with very tiny objects which are to be enlarged, we use a 3d probe. A tiny stylus delicately traces over the surface of the object recording surface data points every 4 thousandths of an inch. This higher resolution obtains information that is just barely visible to the naked eye. Flat images can also be scanned using a typical flat bed scanner. From 2d geometry relief like forms can be generated. Depth is algorithmically assigned based on gray-scale; white is placed at a high elevation, while darker shades are set at comparatively lower elevation. Although less accurate forms are created with this technique, it can be an interesting approach for some applications. |
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©2004 Walla Walla Foundry |
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