CN-121989445-A - Braille printing method and system combined with 3D embossment

CN121989445ACN 121989445 ACN121989445 ACN 121989445ACN-121989445-A

Abstract

The application relates to computer aided design and discloses a Braille printing method and system combining 3D embossments, wherein the Braille printing method and system comprises the steps of carrying out connection fusion on concave-convex topographic maps and multi-level depth maps corresponding to all Braille lattices and generating dual-channel depth maps as printing patterns, controlling the 3D printing system to spray resin on a printing substrate based on the printing patterns read by a light field modulator, utilizing laser to scan the resin surface aiming at the Braille lattice area to form concave-convex structures corresponding to the concave-convex topographic maps, carrying out layered exposure on the adjacent side of the Braille lattice area by utilizing a multi-wavelength DLP projection system, projecting the embossment structures represented by the multi-level depth maps onto a resin layer to form embossment shapes, and carrying out overall solidification on the whole printed piece based on ultraviolet light to form an integrated product of the Braille and the 3D embossments. The application also discloses a computer readable storage medium. The application aims to efficiently manufacture a seamless and high-precision multilayer 3D embossment integrated finished product with braille and related semantics.

Inventors

QIU WEI
WANG JING
ZHANG HAIZHOU

Assignees

深圳市俱进纸品包装有限公司

Dates

Publication Date: 20260508
Application Date: 20260128

Claims (10)

1. A braille printing method in combination with a 3D relief, comprising: Converting the Braille lattice into a concave-convex topographic map, and generating a multi-level depth map by transferring semantic graphs associated with the Braille lattice through a nerve style; carrying out connection fusion on the concave-convex topographic map and the multi-level depth map corresponding to each Braille lattice by utilizing a self-adaptive fusion algorithm, and generating a double-channel depth map as a printing pattern; Inputting the printing pattern into a light field modulator of a 3D printing system, wherein the 3D printing system further comprises a laser and a multi-wavelength DLP projection system; controlling a 3D printing system to spray resin on a printing substrate based on a printing pattern read by a light field modulator, and scanning the surface of the resin by utilizing laser aiming at a Braille lattice area to form a concave-convex structure corresponding to a concave-convex topographic map, and performing layered exposure on the adjacent side of the Braille lattice area by utilizing a multi-wavelength DLP projection system to project a relief structure represented by a multi-level depth map to a resin layer to form a relief model, wherein the multi-wavelength DLP projection system aims at the same relief structure and utilizes light control of curing depths of the resin with different wavelengths; And carrying out overall solidification on the whole printing piece based on ultraviolet light to form an integrated finished product of the braille and the 3D embossment.
2. The 3D-relief-incorporated braille printing method as set forth in claim 1, further comprising: when the concave-convex topographic map corresponding to each Braille lattice and the multi-level depth map are connected and fused, the tail side of the concave-convex topographic map corresponding to each Braille lattice is taken as a starting point, a preset distance is taken as a distance, and the corresponding multi-level depth map is fused and connected; and calculating first curvature continuity between the tail side height of the concave-convex topographic map and the edge area layer height of the multi-level depth map by using a curvature algorithm, and adjusting the edge area layer height according to the first curvature continuity by taking curvature smoothing as a target.
3. The 3D-relief-incorporated braille printing method according to claim 2, characterized in that the 3D-relief-incorporated braille printing method further comprises: After the edge region layer height is adjusted according to the first curvature continuity, calculating second curvature continuity between the edge region layer height and the core region layer height of the multi-level depth map by using a curvature algorithm, and adjusting the core region layer height according to the second curvature continuity with the goal of curvature smoothing.
4. A braille printing method in combination with 3D relief according to claim 2 or 3, characterized in that the step of generating a multi-level depth map by means of neurostimulation migration of semantic patterns associated with braille lattices comprises: Inputting semantic graphs associated with the Braille lattice into a pre-training model so as to enable the neural style of the pre-training model to migrate to generate a multi-level depth map, wherein the pre-training model learns and trains the association relation between the semantic graphs and the multi-level depth map in advance; The braille printing method combined with the 3D relief further comprises the following steps: after the layer height of the multi-level depth map is adjusted, generating an iteration sample according to the multi-level depth map before and after the layer height adjustment and the corresponding semantic graph, and inputting the iteration sample into the pre-training model for iterative training so as to update the pre-training model.
5. The braille printing method combined with 3D relief according to claim 1, the braille printing method combined with the 3D relief is characterized by further comprising the following steps: dynamically generating a corresponding exposure parameter group for each relief level of a multi-level depth map in the process of forming the relief modeling by utilizing a multi-wavelength DLP projection system, wherein the exposure parameter group comprises projection wavelength, light intensity and exposure time; The multi-wavelength DLP projection system performs layered exposure according to the corresponding exposure parameter set of each relief level to form a relief structure on the resin layer.
6. The method for braille printing in combination with 3D relief according to claim 5, wherein the exposure parameter set is generated by using a projection strategy optimization model based on reinforcement learning, and wherein the training process of the projection strategy optimization model is as follows: constructing a Markov decision process which takes the current printing state as input, takes an exposure parameter set as action and takes the comprehensive score of printing quality and efficiency as rewards, and taking the Markov decision process as a basic framework of a projection strategy optimization model; and training the projection strategy optimization model in the resin curing simulation environment by utilizing a deep reinforcement learning algorithm until the iterative training converges to the optimal strategy.
7. The braille printing method combined with 3D relief according to claim 1, the braille printing method combined with the 3D relief is characterized by further comprising the following steps: in the process of manufacturing the concave-convex structure by utilizing laser scanning, dynamically calculating an absolute Z-axis coordinate where a laser focus is located at a current scanning point according to a deviation value between the real-time height of the resin surface and the target height of the concave-convex topographic map; Based on the absolute Z-axis coordinate, the Z-axis position of the laser focus is controlled through a galvanometer system and a dynamic focusing device, and a laser spot is focused on the current resin liquid level to be cured or the current resin surface to be etched at constant energy density.
8. The method for printing braille combined with 3D relief according to claim 1,5, 6 or 7, wherein the 3D printing system is further provided with a focusing processing unit used together with a laser and/or a multi-wavelength DLP projection system, and the method for printing braille combined with 3D relief further comprises: Acquiring the surface three-dimensional morphology of the cured region in real time in the process of manufacturing the concave-convex structure and/or the relief structure; According to the real-time deviation of the surface three-dimensional morphology and the target model and the preset action path of the focusing processing unit, dynamically adjusting the action focus position and/or action angle of the focusing processing unit to enable the focusing processing unit to act on the local area of the surface of the resin to be processed currently; Wherein, the focusing processing unit is a functional material spraying head.
9. A 3D printing system, characterized in that the master control means of the 3D printing system comprises a memory, a processor and a computer program stored on the memory and executable on the processor, which computer program, when being executed by the processor, realizes the steps of the braille printing method in combination with 3D relief according to any of claims 1-8.
10. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the braille printing method in combination with a 3D relief according to any of claims 1 to 8.

Description

Braille printing method and system combined with 3D embossment Technical Field The present application relates to the field of computer aided design, and more particularly, to a braille printing method, a 3D printing system, and a computer readable storage medium that incorporate 3D embossments. Background Braille is used as a main medium for visually impaired people to acquire text information, and the manufacturing technology mainly surrounds the bump formation of the Braille dot matrix. The traditional braille finished product only contains discrete lattice information and has single expression form. For complex visual contents such as graphics, charts, maps, works of art or scientific models and the like containing rich space, texture and level information, it is difficult for visually impaired users to understand and perceive the complete semantic and aesthetic information carried by the graphics, resulting in information islands. In the prior art, if braille and graphic relief are required to be manufactured on the same carrier, a step-by-step processing, splicing or attaching process is generally adopted. For example, a braille plate may be printed and then rough relief may be created in adjacent areas by another set of equipment or manually. The process is complex in flow and low in production efficiency, and more importantly, obvious physical faults or joints often exist between the braille area and the graphic area, so that the overall fluency and consistency of touch exploration are damaged, and the user experience is affected. The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present application and is not intended to represent an admission that the foregoing is prior art. Disclosure of Invention The application mainly aims to provide a braille printing method, a 3D printing system and a computer readable storage medium combined with 3D embossments, aiming at efficiently manufacturing a seamless and high-precision multilayer 3D embossment integrated finished product of braille and related semantics so as to ensure the overall fluency and consistency of tactile exploration of users and improve user experience. In order to achieve the above object, the present application provides a braille printing method combined with 3D embossment, comprising the steps of: Converting the Braille lattice into a concave-convex topographic map, and generating a multi-level depth map by transferring semantic graphs associated with the Braille lattice through a nerve style; carrying out connection fusion on the concave-convex topographic map and the multi-level depth map corresponding to each Braille lattice by utilizing a self-adaptive fusion algorithm, and generating a double-channel depth map as a printing pattern; Inputting the printing pattern into a light field modulator of a 3D printing system, wherein the 3D printing system further comprises a laser and a multi-wavelength DLP (DIGITAL LIGHT Processing ) projection system; controlling a 3D printing system to spray resin on a printing substrate based on a printing pattern read by a light field modulator, and scanning the surface of the resin by utilizing laser aiming at a Braille lattice area to form a concave-convex structure corresponding to a concave-convex topographic map, and performing layered exposure on the adjacent side of the Braille lattice area by utilizing a multi-wavelength DLP projection system to project a relief structure represented by a multi-level depth map to a resin layer to form a relief model, wherein the multi-wavelength DLP projection system aims at the same relief structure and utilizes light control of curing depths of the resin with different wavelengths; And carrying out overall solidification on the whole printing piece based on ultraviolet light to form an integrated finished product of the braille and the 3D embossment. In order to achieve the above object, the present application further provides a 3D printing system, where the main control device of the 3D printing system includes a memory, a processor, and a computer program stored on the memory and capable of running on the processor, where the computer program when executed by the processor implements the steps of the braille printing method described above in conjunction with 3D embossing. To achieve the above object, the present application also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the braille printing method as described above in connection with 3D embossing. The braille printing method, the 3D printing system and the computer readable storage medium combined with the 3D embossment realize that a seamless and high-precision multilayer 3D embossment integrated finished product of braille and related semantics is manufactured in an automatic 3D printing process, so that the production efficiency is impr