Representation method for a sense of depth
If there are a number of 3D computer graphics objects to
edit, the order of the objects along the depth direction is
represented by scaling among the objects, overlapping of the
objects, and the degree of transparency. However, these
methods of representing a sense of depth have significant
effect losses, while the objects are created and edited. Thus,
we add the gradation of color effect to the perspective view
in the 2D display.
Figure 3 shows the test images used to evaluate the sense
of depth. Figure 3(a) shows “type a,” in which three triangles
are represented by a different gradation of brightness,
depending on their order along the depth dimension. Figure
3(b) shows the same three objects represented by gradation
of saturation. Figure 3(c) shows the same three objects
represented by gradation of color tone, that is, changes in
both brightness and saturation. Figure 3(d) shows the three
objects without the use of gradation of color; therefore, they
are drawn with the same brightness and saturation