Title:
IMPROVED METHOD FOR GENERATING HALFTONE PROJECTION AND MODEL FOR 3D PRINTING
Document Type and Number:
WIPO Patent Application WO/2017/156815
Kind Code:
A1
Abstract:
An improved method for generating halftone projection and a model for 3D printing, the method comprising: calculating an reference projection image by using a project simulation method according to a given three-dimensional model, a projection receiving surface and basic parameters of a light source; correcting a given grayscale image to obtain an illuminance diagram; corresponding points in the illuminance diagram to the reference projection image; normalizing to obtain a density graph by means of calculation; using a Voronoi division method having capacity constraints to provide an optimal circle permutation according to the density graph; and according to the type of a hole as determined by the optimal circular permutation, determining the corresponding size and position of the hole as well as the direction and angle of the light source, and generating a physical model for 3D printing. By means of the present method, the light source transmits through the hole on the model to form a continuous grayscale image which is closest to the given grayscale image, and no obviously visible discrete spot is present.
Inventors:
CHEN BAOQUAN (CN)
COHEN OR DANIEL (IL)
LISCHINSKI DANI (IL)
LV LIN (CN)
SHARF ANDREI (IL)
WEI YUAN (CN)
ZHAO HAISEN (CN)
COHEN OR DANIEL (IL)
LISCHINSKI DANI (IL)
LV LIN (CN)
SHARF ANDREI (IL)
WEI YUAN (CN)
ZHAO HAISEN (CN)
Application Number:
PCT/CN2016/079176
Publication Date:
September 21, 2017
Filing Date:
April 13, 2016
Export Citation:
Assignee:
UNIV SHANDONG (CN)
International Classes:
G06T17/30
Foreign References:
| CN105023296A | 2015-11-04 | |||
| CN103978690A | 2014-08-13 | |||
| US20110075944A1 | 2011-03-31 |
Other References:
ZHAO, - HAISEN ET AL.: "Printed Perforated Lampshades for Continuous Projective Images", ARXIV E-PRINTS ABSTRACT SERVICE, 31 October 2015 (2015-10-31), XP058259728
LIANG, GUANGHUI ET AL.: "Poisson disk sampling through disk packing", COMPUTATIONAL VISUAL MEDIA, vol. 1, no. 1, 31 March 2015 (2015-03-31), XP055424061
LU , LIN ET AL.: "Build-to-Last:Strength to Weight 3D printed Objects", ACM TRANSACTION ON GRAPHICS, vol. 33, no. 4, 31 July 2014 (2014-07-31), XP058051982
LIANG, GUANGHUI ET AL.: "Poisson disk sampling through disk packing", COMPUTATIONAL VISUAL MEDIA, vol. 1, no. 1, 31 March 2015 (2015-03-31), XP055424061
LU , LIN ET AL.: "Build-to-Last:Strength to Weight 3D printed Objects", ACM TRANSACTION ON GRAPHICS, vol. 33, no. 4, 31 July 2014 (2014-07-31), XP058051982
Attorney, Agent or Firm:
JINAN SHENGDA INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
Download PDF:
Previous Patent: QUANTITATIVE UNIDIRECTIONAL OIL-AIR LUBRICATION SYSTEM AND METHOD FOR FOUR-STROKE ENGINE
Next Patent: TELESCOPIC QUICK CLAMP
Next Patent: TELESCOPIC QUICK CLAMP