WiMi Hologram Cloud Inc (WIMI)

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WIMI (NASDAQ: WIMI) develops an interactive holographic display system based on finger gestures.

Source
https://cj.sina.com.cn/articles/view/7651844612/1c815e20402001fy02?from=finance

March 2, 2023

Holographic technology uses light interference and diffraction to record and reconstruct the light wave surface. During the reproduction process of hologram, holographic technology can not only accurately reconstruct the amplitude information of light wave, but also reconstruct its phase information. How to use holographic technology for 3D display has always been a hot topic in the field of 3D stereoscopic display.

WIMI (NASDAQ: WIMI) has developed an interactive holographic display system based on finger gestures. Through this system, users can intuitively process electronic holographic images in real time through finger gesture movements detected by motion sensors. This intuitive control mechanism provides users with a realistic and immersive environment.

First, the system detects the observer's gestures using motion sensors. After the finger gesture movement is detected, the system generates a 3D object composed of point clouds, and calculates the CGH of the 3D object, and then displays the CGH on the SLM, and reconstructs the holographic 3D image by illuminating the SLM, and realizes the interactive processing of the electronic holographic moving image .

In order to achieve interactive operation without discomfort, the system needs to be operated in real time. For this reason, we combine CPU and GPU to process point cloud and calculate CGH in parallel, and distribute the calculation load to multiple GPUs. Computational holography obtains the hologram, and then carries out photoelectric reconstruction on it, combined with computer vision to detect the position of the human finger, and guides the dynamic display of the digital holographic photoelectric reproduction of the real image. The digital holographic photoelectric reproduction system performs photoelectric reproduction to the digital hologram and projects the reproduced real image. In terms of interaction, the vision system detects finger gesture movements, and feeds back the detection results to the digital holographic photoelectric reproduction system to guide the reproduced holographic images, thereby realizing the interactive display of digital holographic real images.

Because holograms are recorded on photosensitive materials, it is difficult to use holograms to record and reproduce moving images. By simulating the propagation and interference of light on a computer, and using a large-scale programmable gate array, a graphics processing unit (GPU) and an accelerated computing algorithm of CGH, the three-dimensional image can be successfully reconstructed and interacted in real time.

WIMI's interactive holographic display system based on finger gestures enables users to intuitively process electronic holographic images in real time. At the same time, by using a graphics processing unit to parallelize holographic calculations, real-time interactive processing of holographic images is realized. In addition, WIMI will also strive to expand the system to a full-color reconstruction system to generate more realistic 3D images.

Domestic holographic technology started late but developed rapidly, and is currently mainly used in entertainment games, exhibitions and other fields. Holographic technology has many advantages such as multi-dimensional storage, 3D realistic vision, and naked-eye display. With the continuous development of holographic technology, holographic technology is now developing in the direction of digitalization and optomechanical integration. More and more products developed by using holographic technology are going to the market, and at the same time, the emergence of microwave holography and acoustic holography has also been spawned. Holographic technology occupies an important position in both life and academic fields, and has a very broad market. We have reasons to believe that in the future, holographic technology will become an irreplaceable important technology in the social and economic fields.