Three-dimensional scene model generating method

A three-dimensional scene model generating method, comprising:

• S1:
• pre-processing stage:
• S11:
• analyzing and extracting a plurality of object structure groups of a scene from a scene model library, wherein each object structure group defines the semantic relationship of objects in the scene;
• S12:
• counting and fitting the relative position of the objects in each object structure group, and calculating a Gaussian distribution function;
• S2:
• generating stage:
• S21:
• inputting a scene expressed by a sketch, and retrieving each object in the sketch in the model library;
• S22:
• determining an object model corresponding to the sketch in combination with the retrieval result in S21 and the semantic relationship in S1;
• S23:
• calculating the initial position of the corresponding object model according to the sketch;
• S24:
• finding out a local optimal position according to the initial position calculated in S23 and the Gaussian distribution function in S12 in combination with a gradient descent method, and placing each object model in S22 according to the position to obtain a final scene model, wherein the local optimal position is the reasonable placement position of the model.