2. The image is artificially created, and the image is naturally reproduced.
Generally speaking, image is the reproduction of objective objects and the restoration of noumenon when images and images are associated with the word "picture". We can understand it as pictures, photos and videos, not artificial graphics. "Image" focuses on the deformation, refinement and sublimation of natural objects, and is a kind of figure.
3. Images pay attention to shape and changing trend, while images pay attention to color and overall impression.
Points, lines, surfaces and various geometric figures in the coordinate system belong to the function "image" and cannot be replaced by "image". For example, the image of a quadratic function is a parabola. Any expression of shape or appearance should be called "image".