The coordinate system is arbitrary, you could use any other axis as well. The coordinate system is just a mathematical tool, not something physical.Why z-axis.
What?How is measured that?
The Z-direction refers to the vertical or up-down axis in a three-dimensional coordinate system. It is commonly represented by the letter Z and is perpendicular to both the X and Y axes.
A quantisation axis is a reference axis used in quantization, a process of converting continuous values into discrete values. It is used to define the levels or steps in which the values are quantized.
The Z-direction is used as the quantisation axis in certain systems, where the values are quantized in discrete levels along the vertical axis. This allows for easier comparison and analysis of data along the Z-direction.
Yes, the Z-direction can be changed depending on the coordinate system being used. In some cases, such as in physics or mathematics, the Z-direction may be defined differently than in computer graphics or engineering.
The Z-direction is important because it allows for the representation and analysis of three-dimensional objects and data. It also plays a crucial role in quantization, which is used in various fields such as signal processing, data compression, and quantum mechanics.