Circular-Platform Bitmap Processing for Uniform 3D Printing
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Solution Overview
Problem
Conventional 3D inkjet printers with a circular printing platform face inefficiencies due to the printing head not working during acceleration, deceleration, and stop phases, leading to low printing efficiency and inconsistent pixel point distribution, causing print object distortion.
Innovation Solution
An image data processing method that divides the bitmap image into regions, selects sampling positions, and rearranges sample points to form a second bitmap image, ensuring uniform pixel point distribution by arranging points according to the printing head's movement, particularly on a circular platform.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional 3D inkjet printer uses a linear printing platform moving along X and Y axes, then the printing head can work in a straightforward manner, but the printing efficiency is low due to acceleration, deceleration, and stop phases
Solution Approach 1:
The patent transforms the linear printing platform into a circular printing platform that rotates continuously. This curvature change eliminates the need for acceleration, deceleration, and stopping phases, allowing the printing head to work continuously at constant speed, thereby improving printing efficiency and reducing time loss.
2Productivity
If a circular printing platform rotates continuously to improve printing efficiency, then acceleration and deceleration phases are eliminated, but pixel points become inconsistently distributed with higher density near the center, causing print object distortion
Solution Approach 1:
The patent applies preliminary image processing to generate a corrected bitmap image before printing. This preprocessing step compensates for the expected non-uniform pixel distribution on the circular platform, ensuring that after rotation and printing, the pixel points are uniformly distributed and the print object is not distorted.
Solution Approach 2:
The patent transforms the coordinate system and pixel distribution parameters from a standard rectangular bitmap to a corrected bitmap suitable for circular rotation. By changing the parameter representation of pixel positions and densities, the system achieves uniform distribution despite the circular motion, eliminating print distortion.
3Manufacturing precision
If image processing is applied to correct pixel distribution, then print quality improves, but the processing complexity increases
Solution Approach 1:
The patent divides the image processing into distinct segments: generating the corrected bitmap image through coordinate transformation, and then using this pre-processed image for printing. This segmentation simplifies the overall process by separating the complex correction algorithm from the printing operation, making the system more manageable and implementable.
Data Source
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AI summary
The present application relates to the field of rapid prototyping technology, and more particularly, to an image data processing method and a printing system for printing technology. The image includes a first bitmap image. The image data processing method includes: dividing the first bitmap image into a plurality of regions, selecting sampling positions in each of the plurality of regions and performing sampling to acquire sample points; and rearranging the sample points to form a second bitmap image. In the present application, the second bitmap image is a point on each of the plurality of regions and the point can be arranged according to a printing manner, so in a process of printing by a printing head, data of the second bitmap image is actually arranged in a manner of a region, thereby avoiding a problem of an inconsistent distribution of pixel points of different radii, making the pixel points on each region be distributed as evenly as possible, and thus improving a printing quality of a print object.