Microbeauty holography uses laser technology to realize numerical reconstruction of three-dimensional images from optical scanning holograms

With the development of computer technology, digital signal processing algorithms are constantly optimized and improved, such as efficient algorithms based on GPU and multi-level parallel processing, which greatly improves the reconstruction speed of holographic images. Holographic three-dimensional imaging technology with its unique advantages has gradually been widely used in medical, biological science, materials science, physics and other fields, such as beam navigation, optical microimaging, high resolution microscopic imaging, etc.

It is known that the R&D team of WIMI (NASDAQ:WIMI) has developed Digital holography and three-dimensional imaging technology, This is a new technology of 3D image detection, analysis, recognition and display using laser technology, digital signal processing and other technical means. It records the amplitude and phase of the object in the interference pattern of the object and the reference wave to calculate the three-dimensional structure of the object, and then converts the interference pattern into holographic image by digital signal processing, and then converts the holographic image into three-dimensional image by numerical reconstruction processing technology, so as to realize the three-dimensional image reconstruction of the object.

The basic principle of numerical reconstruction of three-dimensional images by optical scanning hologram developed by WIMI Holographic involves optics, interferology and digital image processing technology. Its technical flow includes hologram recording, digital hologram, computation of reverse transfer function, digital image processing, reconstruction hologram, etc. Through these steps, three-dimensional images with high fidelity and veriseness can be obtained, which is helpful to better study and display the information of the shape and structure of the object.

Hologram recording

A laser source is used to produce a coherent beam of light, which is then passed through an object to scatter or reflect the beam. Then the scattered or reflected light interferes with a reference beam to form an optical hologram.

Digital hologram

The optical hologram is scanned digitally and converted into digital information through digital processing. The digitized holographic image is represented by pixel array (lattice), and the gray value of each pixel is proportional to the density of the ink sheet.

Compute the reverse transfer function

A computer algorithm is used to calculate the information of the object stored by the hologram. This process is called calculating the reverse transfer function. The reverse transfer function refers to the algorithm for deriving the original object field from the hologram. To obtain the three-dimensional form information of the object, that is, the position coordinates of each point in space and the shape of the object.

Digital image processing

In the process of digital image processing, digital holograms need to be preprocessed, such as contrast enhancement, noise reduction, etc., to improve the quality of the final reconstructed image.

Three-dimensional reconstruction

The processed hologram is converted into three dimensional image by computer algorithm, so as to complete the process of image reconstruction. According to the interaction between the inverse transfer function and the wavefront generated by the light source, a three-dimensional image can be obtained based on the diffraction technique.

Render image

Computer graphics algorithm is used to render three - dimensional images with a sense of verisimilitude. The rendering process can simulate the physical properties of light, such as shadows, reflections, etc.

WIMI's optical scanning hologram numerical reconstruction of three-dimensional image technology has very high resolution and can achieve microscopic level imaging. Moreover, the visualization effect is good, which can not only visually present the three-dimensional shape of the object, but also provide the optical property information of the object, which will provide a powerful tool for scientific research. It will be widely used in biology, medicine, materials science and other fields, such as three-dimensional microscopic imaging, medical image diagnosis, material quantitative analysis and quality inspection.

With the increasing demand for 3D information, 3D imaging technology represented by optical scanning hologram numerical reconstruction technology will gradually become an important basis for 3D vision, AR/VR and other fields. Therefore, the application prospect of this technology will be more and more extensive trend. On the one hand, with the continuous progress of science and technology, the emergence of new technologies will provide a broad space for the continuous improvement of the technology. At the same time, the technology itself has many fields that can be further developed, such as three-dimensional superresolution microscopic imaging, three-dimensional surface measurement, three-dimensional printing and other aspects have great application potential.

Source: Mobile China