WiMi Hologram Cloud a leading global Hologram Augmented Reality (“AR”) Technology provider announced that it developed DMD-SSD high-speed digital hologram playback technology. The technology makes full use of the advantages of digital micromirror devices (DMDs) and solid state drives (SSDs), and realizes high-speed reconstruction and high quality of complex 3D objects containing millions of point clouds by using synthetic color CGH and binary CGH packing technology, as well as space-time division multiplexing technology. Dedicated to solving the challenges of storage, computation and playback efficiency in the past hologram technology, it provides a new direction for the future development of hologram technology.
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WiMi’s DMD-SSD high-speed digital hologram playback technology is based on DMDs and SSDs, combining synthetic color CGH and binary CGH packing techniques and space-time division multiplexing for high-speed, efficient holographic video storage, computation and playback. The following is a summary of the technical framework of the technology:
DMD: DMD is one of the key components of the technology to achieve high-speed holographic video playback. The DMD panel and DMD controller comprise a module that can drive the GPU to output color images. The DMD enables high-speed calculation of holograms and drives the DMD panel as a spatial light modulator (SLM) for display.
SSD: SSD is used as a storage medium with fast data reading and storage capability. All computational holograms (CGH) for holographic video are pre-computed and stored in the SSD. Such storage supports high-speed playback of holographic videos by reducing data access time, allowing each packed frame to be quickly loaded and decompressed.
High-speed CGH computation: High-speed CGH computation is required to achieve visual persistence effects. The synthetic color CGH generates synthetic color CGH by synthesizing six RGB binary CGHs, which is used to drive the DMD panel as SLM, while the binary CGH packing technology is used to reduce the amount of data stored in SSDs and optimize the computational efficiency of holographic video.
Spatio-temporal multiplexing technique: The original 3D model is spatially divided into many sub-objects, by means of electro-holography. In each frame, the CGHs of the corresponding sub-objects Div-1 to Div-N are generated using the spatio-temporal division multiplexing technique and displayed on the SLM to realize the 3D image reconstruction of each sub-object.
The technical framework of WiMi’s DMD-SSD high-speed digital hologram playback technology makes full use of the advantages of DMD and SSD, and realizes highly efficient and clear hologram video playback through high-speed CGH computation and space-time division multiplexing technology.
Data pre-processing and storage: Data pre-processing and segmentation are performed for 3D objects containing many object points. The original 3D model is spatially divided into multiple sub-objects and corresponding CGHs are generated for each sub-object. these CGH data are pre-calculated and stored in SSDs, and the packing technique of binary CGHs is utilized to reduce the amount of stored data in order to optimize the storage space and improve the reading efficiency.
High-speed CGH computation and synthesis of color CGH: This adopts several optimization strategies to improve computational efficiency. First, a high-performance computer system is utilized for CGH computation, which reduces the time cost of CGH computation by optimizing the algorithm and computation process. Second, a synthetic color CGH technique is incorporated to synthesize six RGB binary CGHs into one CGH, which reduces the amount of computation and improves computational efficiency. In addition, in the pre-processing stage, the amount of data required for computation is reduced by spatial segmentation and data processing of the 3D model, which further optimizes the CGH computation process. Through the combined application of these optimization strategies, the technique successfully achieves high-speed CGH computation, which provides strong support for the real-time generation of high-definition holographic videos.
The realization of spatio-temporal multiplexing: In each frame, the space of the original 3D model is partitioned into many sub-objects, the corresponding CGH is generated for each sub-object, and the 3D image of each sub-object is reconstructed and displayed on the SLM through the collaborative work of the DMD panel and the DMD controller. Through the spatio-temporal multiplexing technique, the degradation of 3D video reconstructed from 3D objects containing many object points is avoided, and the image quality of the holographic video is guaranteed.
DMD-SSD: The pre-calculated CGH data stored in SSD is converted into high-definition, high-quality holographic video through high-speed data loading and decompression, fast CGH calculation and synthesized color CGH technology. The DMD, as one of the key components, drives the SLM to display the synthesized color CGH, which realizes the high-speed digital electronic playback of holographic video.
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WiMi’s DMD-SSD high-speed digital hologram playback technology needs to be further optimized and improved. In terms of technology, the speed and efficiency of CGH computation are improved by optimizing the algorithm and computation process, and the computation cost is further reduced. In addition, research on holographic video data compression and storage is strengthened to further improve the efficiency of data storage and reading. Through continuous technical optimization and improvement, the performance and reliability of the technology can be further enhanced to expand its application areas and market prospects. With the continuous development and maturity of hologram technology, WiMi’s DMD-SSD high-speed digital hologram playback technology is expected to become an important breakthrough point and technical support in the field of holograms. More innovative applications and products based on this technology are expected to emerge in the future.
As an emerging hologram technology, DMD-SSD high-speed digital electronic holographic playback makes full use of the advantages of digital micromirror devices and solid-state drives, and successfully realizes high-speed, high-definition holographic video storage, computation and playback by means of the synthesized color CGH and binary CGH packing technology, as well as space-temporal multiplexing technology. The development and realization of this technology effectively solves the pain points of storage, calculation and playback efficiency in the past hologram technology, and brings breakthroughs and possibilities for the application of hologram technology.
In the future, WiMi’s DMD-SSD high-speed digital hologram playback technology is expected to play a more extensive role in medical imaging, industrial design, virtual reality and augmented reality, bringing a clearer and more accurate 3D imaging experience to these fields. Meanwhile, through continuous technical optimization and improvement, the technology is expected to enhance the calculation speed, data storage efficiency and image quality, further expanding its application fields and market prospects. Through continuous innovation and industrialization, DMD-SSD high-speed digital hologram playback technology will bring broader prospects and opportunities for the future development of hologram technology, and help hologram technology to become more popular.
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