What Is a Drop Shadow?

Projection refers to the projection of the shape of an object onto a plane by a group of rays, and is called "projection". The image obtained on this plane is also called "projection". Projection can be divided into orthographic and oblique projection. Orthographic projection is the oblique projection in which the centerline of the projection line is perpendicular to the plane of projection, and the centerline of projection is not perpendicular to the projection plane.

projection

(Optical term)

The shadow formed by the object under the sun's rays (referred to as the sun shadow) is a parallel projection. The direction of the sun can reflect time,

The projection of an object under the light of a light bulb is the center projection. Now a projection display system sRGB is

Radiography is the projection of a three-dimensional specimen (including defects therein) onto a base film by projection, which is transformed into an image with only two dimensions. Due to the change in the relative position and angle of the ray source, the object (including its defects), and the film, the image on the film will differ from the actual size, shape, and position. Common overlaps, enlargements, distortions, and relative Position change, etc.