Calibration Method for Splicing Light Source Modules, Projection Method, and 3D Printing Method

A projection method, comprising:

• performing segmentation processing on a slice image to be projected according to a projection region of each of light source modules to obtain a plurality of segmented images;
• and
• performing gradient processing on image information of splicing overlapping parts of the plurality of segmented images, and transmitting the processed segmented images to the corresponding light source modules respectively, wherein each of the light source modules is obtained by being calibrated through the calibration method for splicing light source modules, wherein the calibration method for splicing light source modules comprises:
• performing optical calibration processing on each of the light source modules, wherein an splicing overlapping part is present in projection regions of the light source modules subjected to optical calibration processing;
• and
• performing, on a basis of the splicing overlapping part, calibration accuracy inspection for splicing overlapping of each of the light source modules subjected to optical calibration processing.

A 3D printing method, characterized by comprising:

• slicing a three-dimensional data model to obtain a plurality of slice images;
• and
• sequentially performing the projection method on each of the plurality of slice images according to a predetermined projection order of the plurality of slice images;
• wherein the projection method comprises:
• performing segmentation processing on a slice image to be projected according to a projection region of each of light source modules to obtain a plurality of segmented images;
• and
• performing gradient processing on image information of splicing overlapping parts of the plurality of segmented images, and transmitting the processed segmented images to the corresponding light source modules respectively, wherein each of the light source modules is obtained by being calibrated through the calibration method for splicing light source modules, wherein the calibration method for splicing light source modules comprises:
• performing optical calibration processing on each of the light source modules, wherein an splicing overlapping part is present in projection regions of the light source modules subjected to optical calibration processing;
• and
• performing, on a basis of the splicing overlapping part, calibration accuracy inspection for splicing overlapping of each of the light source modules subjected to optical calibration processing;
• wherein the calibration method further comprising:
• determining a calibration accuracy on a basis of a difference between an overlapped projection feature point of each of the light source modules in the splicing overlapping part and a standard point position or a difference between a projection feature point of each of the light source modules and a standard point position, and comprising at least one of following:
• determining the calibration accuracy according to a deviation between a center coordinate of the overlapped projection feature point and a calibration identification point on a calibration tool;
• determining the calibration accuracy according to a shape of a overlapped projection feature point;
• determining the calibration accuracy according to an overlapping ratio of the projection feature points;
• reflecting the calibration accuracy by inspecting an overlapping accuracy of overlapping calibration identification points constructed by the splicing overlapping part on a basis of a deviation or a coordinate difference of the projection feature points from a standard position;
• wherein when the calibration accuracy inspection fails, re-preforming optical calibration processing on each of the light source modules.