US 11,704,858 B2
Method and system for diffusing color error into additive manufactured objects
Yoav Bressler, Tel-Aviv (IL); Shai Lipowitch, Petach-Tikva (IL); Shahar Klinger, Rehovot (IL); and Mayan Rumbak, Mazkeret Batia (IL)
Assigned to Stratasys Ltd., Rehovot (IL)
Filed by Stratasys Ltd., Rehovot (IL)
Filed on Aug. 14, 2022, as Appl. No. 17/887,462.
Application 17/887,462 is a continuation of application No. 17/280,894, granted, now 11,417,047, previously published as PCT/IL2019/051071, filed on Sep. 27, 2019.
Claims priority of provisional application 62/737,931, filed on Sep. 28, 2018.
Prior Publication US 2022/0392143 A1, Dec. 8, 2022
Int. Cl. G06T 15/04 (2011.01); G06T 7/529 (2017.01); B29C 64/112 (2017.01); B29C 64/393 (2017.01); G06T 11/00 (2006.01); B33Y 10/00 (2015.01); B33Y 50/02 (2015.01)
CPC G06T 15/04 (2013.01) [B29C 64/112 (2017.08); B29C 64/393 (2017.08); G06T 7/529 (2017.01); G06T 11/001 (2013.01); B33Y 10/00 (2014.12); B33Y 50/02 (2014.12)] 10 Claims
OG exemplary drawing
 
1. A method of additive manufacturing of a three-dimensional object, by an additive manufacturing system loaded with a plurality of colored building materials and at least one non-colored building material, the method comprising:
receiving computer object data having a three-dimensional grid of voxels collectively describing a shape of the three-dimensional object, and an input color texture to be visible over a surface of the object;
for at least a portion of said voxels, classifying said voxel as being either a surface voxel or an internal voxel, wherein each surface voxel is associated with a group of internal voxels forming a receptive field for said surface voxel;
for surface voxel and associated receptive field:
determining a multi-component color for said surface voxel based on a local color of said input color texture corresponding to a location of said surface voxel, wherein each component of said multi-component color corresponds to a color of one colored building material,
assigning said surface voxel and each voxel of said receptive field with one of said color components to define a color stack having a plurality of segments, each having a height that is proportional to a weight of one color component in said multi-component color and comprising all voxels that are assigned with said color component, and
applying a halftoning procedure to each of said surface voxel and said receptive field voxels, to probabilistically designate said voxel with one building material selected from the group consisting of: a non-colored building material, and a colored building material having a color corresponding to a color component assigned to said voxel; and
dispensing and solidifying said building materials by said additive manufacturing system according to said building material designations to sequentially form a plurality of hardened layers in a configured pattern corresponding to said shape of the three-dimensional object.