Compression method of 3D printing file

Abstract

The invention discloses a compression method of a 3D printing file. The method comprises the following steps of (1) traversing the image data of all layers, setting the data of which the pixel value is smaller than a set value as 0, and storing the new image data; (2) traversing the image data of all layers, obtaining a pixel value difference chart of the current layer and the previous layer, and judging and marking each layer as a difference layer, a non-difference layer or a reference layer; (3) classifying all data into valid data, gray data and invalid data according to the pixel values; (4) if the previous layer is the reference layer, classifying and coding all data of the layer; if the current layer is the difference layer, classifying and coding a difference graph of the layer; if the current layer is the non-difference layer, recording the number of layers; and (5) repeating the step (4) until all the layers are coded or the number of the layers is recorded. According to the method, the storage size of the 3D printing file is effectively compressed in a mode of invalid data filtering, subtraction of the adjacent layer image data and classification and coding.

Description

technical field [0001] The invention belongs to the field of data processing, and in particular relates to a method for compressing 3D printing files. Background technique [0002] In a 3D stereolithography printer, a print file is a recording file composed of slices of 3D models and some parameters. The print file mainly records a large number of layer image data after slicing the 3D model. For a model with high complexity and large volume, due to the huge amount of information, this type of recording file is often too large. For example, print files in common formats, svg files or simple package files, etc., a print file exceeds 2GB. [0003] In the software control system of 3D stereolithography printers, the available operating memory is often relatively limited due to hardware costs and embedded software architecture. It is necessary to open up memory of the same size as the image first, and only after the image is fully loaded at one time can it be passed to the "vid...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of too large print file and too large image size in the memory in the light-curing printer, and propose a compression method for 3D print files, through invalid data filtering, difference of adjacent layer image data and classification coding The way to solve the problem of printing files is too large

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