Holography Laser Projection Research Papers (original) (raw)

One of the main drawbacks of Digital Holography (DH) is the coherent nature of the light source, which severely corrupts the quality of holographic reconstructions. Although numerous techniques to reduce noise in DH have provided good results, holo-graphic noise suppression remains a challenging task. We propose a novel framework that combines the concepts of encoding multiple uncorrelated digital holograms, block grouping and collaborative filtering to achieve quasi noise-free DH reconstructions. The optimized joint action of these different image-denoising methods permits the removal of up to 98% of the noise while preserving the image contrast. The resulting quality of the hologram reconstructions is comparable to the quality achievable with non-coherent techniques and far beyond the current state of art in DH. Experimental validation is provided for both single-wavelength and multi-wavelength DH, and a comparison with the most used holographic denoising methods is performed.

- by and +2
- •
- Digital Holography, Holography, Holography Laser Projection, Holographic Display

In this study, we demonstrate a practical synthetic hologram with a size of 30 mm × 30 mm at resolution of 94340 × 94340. The high-definition large-scale computer-generated full-parallax synthetic hologram is achieved through frequency mosaic with different perspective images. The sparsity characteristics mosaic frequency of full parallax synthetic hologram is analyzed for reducing the complexity of computation. Following elimination of the sparsity, the hologram is calculated by normalization of 2D inverse Fourier transform of the mosaic frequency. The error and object point size are analyzed and we conclude that the error is sufficiently small for human visual perception given that parallax angle and object depth are within acceptable limits.

- by Edward Buckley and +1
- •
- Holography Laser Projection

One of the main drawbacks of Digital Holography (DH) is the coherent nature of the light source, which severely corrupts the quality of holographic reconstructions. Although numerous techniques to reduce noise in DH have provided good results, holographic noise suppression remains a challenging task. We propose a novel framework that combines the concepts of encoding multiple uncorrelated digital holograms, block grouping and collaborative filtering to achieve quasi noise-free DH reconstructions. The optimized joint action of these different image-denoising methods permits the removal of up to 98% of the noise while preserving the image contrast. The resulting quality of the hologram reconstructions is comparable to the quality achievable with non-coherent techniques and far beyond the current state of art in DH. Experimental validation is provided for both singlewavelength and multi-wavelength DH, and a comparison with the most used holographic denoising methods is performed.

- by Andrea Finizio
- •
- Computer Science, Digital Holography, Medicine, Holography

AV Workshop in NYC, conveniently located in midtown Manhattan, can partner with your venue and assist your in-house staff with the AV Technology equipment you need and onsite support or they can handle all of the audio visual details you need for your venue’s event, whether it is a hotel, restaurant, catering hall, venue or other event space. Audio Visual Rental Manhattan can also simply rent equipment to you for your event or venue after a thorough consultation to make sure you have all you need to make your event a success. No matter what size of complexity of your event, AV Workshop can provide service that is impeccable and State of the Art technology that will impress you and your guests!

- by Av Workshop
- •
- Event Management, Sporting Events, Events management, Event marketing