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4.2.2 Ruler placement
The ruler is a device that determines the overall accuracy of the photogrammetry,
similar to the scale of the map. The KSCAN series of rulers are divided into two
types: a short ruler on the left and right sides of the standard configuration
quick-adjustment plate and an optional 1m ruler.
Short ruler: The length of the ruler is short, suitable for medium and large
workpieces, and the accuracy is slightly worse than the long scale. Its shape is
shown in Figure 4-3.
Figure4- 3 Short ruler
1m ruler: The length of the scale is 1m, which is suitable for medium and large
workpiece shooting with high precision. Its shape is shown in Figure 4-4.