3-D projection printing system and fabrication method therefor
The embodiment of the present invention provides a method for a 3-D projection printing system and a system thereof, more particularly to a system adopts both ways of look-up table and interpolation method to calibrate. The embodiment of the present invention provides a portable calibration fixture system and a flexible 3-D projection printing system in order to improve calibration precision, facilitate calibration and printing operations, increase printing effect and save cost.
1. A fabrication method for a 3-D projection printing system, comprising:
providing a single first sample pattern having multiple nodes;
capturing an image of the single first sample pattern to obtain a first practical pattern;
producing a first camera look-up table according to displacement amounts of nodes between the first practical pattern and the single first sample pattern;
transforming the first camera look-up table into a second camera look-up table with a camera resolution;
projecting a single second sample pattern having multiple nodes on a medium by a projector of the 3-D projection printing system;
capturing an image of the projected single second sample pattern to obtain a second practical pattern;
using the second camera look-up table to calibrate the second practical pattern to obtain a calibrated pattern;
producing a first projection look-up table according to displacement amounts of nodes between the calibrated pattern and the single second sample pattern;
transforming the first projection look-up table into a second projection look-up table with a projector resolution;
calibrating a plurality of sliced printing files according to the second projection look-up table to form calibrated sliced printing files;
engaging the calibrated sliced printing files in a projection printing work; and
fabricating an object with the 3-D projection printing system.
2. The fabrication method for the 3-D projection printing system according to claim 1 , wherein each of the single first sample pattern and the single second sample pattern is a grid pattern.
3. The fabrication method for the 3-D projection printing system according to claim 1 , wherein a resolution of the second projection look-up table is higher than a resolution of the first projection look-up table.
4. The fabrication method for the 3-D projection printing system according to claim 1 , wherein the medium is a diffuser.
5. The fabrication method for the 3-D projection printing system according to claim 1 , wherein a resolution of the second camera look-up table is higher than a resolution of the first camera look-up table.
6. The fabrication method for the 3-D projection printing system according to claim 1 , further comprising:
transmitting a plurality of calibrated sliced printing files to a printing control system of the 3-D printing system.
7. The fabrication method for the 3-D projection printing system according to claim 6 , wherein the plurality of sliced printing files are calibrated by a calculation control system, and the calculation control system is a computer, a station, a CPU, a software, a firmware, or a network system.
8. The fabrication method for the 3-D projection printing system according to claim 1 , further comprising:
reflecting the single first sample pattern and the projected single second sample pattern to be captured by an image-capturing device.
9. The fabrication method for the 3-D projection printing system according to claim 1 , further comprising:
storing the second projection look-up table into a storing unit.