Color 3D printing method, printing apparatus and terminal device

A color three-dimensional (3D) printing apparatus, comprising:

• a memory, a processor and a computer program stored on the memory and runnable on the processor,
• wherein the processor, when running the computer program, is configured to:
• acquire an original three-dimensional model of an object to be printed;
• perform shell processing to the original three-dimensional model to generate an inner model and an outer model of the original three-dimensional model;
• and
• perform slicing processing to the inner model and the outer model to generate multiple printing data corresponding one-to-one with each printing layer, the printing data comprising structural data representing the inner model in a printing layer, actual color data representing the outer model in the printing layer, and structural data representing the outer model in the printing layer;
• and
• print the object to be printed using the printing material according to the printing data;
• wherein the structural data representing the inner model in the printing layer is represented in a form of first image information, the actual color data representing the outer model in the printing layer is represented in a form of second image information and the structural data representing the outer model in the printing layer is represented in a form of third image information;
• wherein the first image information is configured for deciding whether to respond to a printing job when the inner model is being printed, and then determining whether to print the inner model, the third image information is configured for deciding whether to respond to the printing job when the outer model is being printed, and then determining whether to print the outer model, and the actual color of the printing material having the actual color of the outer model is determined by the second image information;
• wherein before the performing slicing processing to the inner model and the outer model to generate multiple printing data corresponding one-to-one with each printing layer, the method further comprises:
• acquiring an empty region under a suspended part in the original three-dimensional model, and establishing, in the empty region under the suspended part, a supporting structure configured to fill the empty region under the suspended part;
• the performing slicing processing to the inner model and the outer model to generate multiple printing data corresponding one-to-one with each printing layer further comprises:
• performing slicing processing to the supporting structure to generate fourth image information;
• wherein before the printing the object to be printed using the printing material according to the printing data, the method further comprises:
• performing integration processing to the first image information, the third image information and the fourth image information to generate fifth image information, wherein the fifth image information is a 4-value image comprising four data structures, and the four data structures are given different representations;
• the printing the object to be printed using the printing material according to the printing data comprises:
• determining a structure in the printing layer according to the second image information and the fifth image information, and determining the actual color of the outer model in the printing layer according to the second image information;
• and
• printing the structure in the printing layer by using the printing material having the actual color, the printing material comprising a printing material having the actual color of the outer model in the printing layer.