Always focused image - Cameraman

Observed images while the focal length of the camera is changing. The displayed image remain clear, demonstrating always focused images of Maxwellian Near-to-eye displa

trinonoccluded.avi

Numerical observation of conventional mesh based computer generated hologram from different directions which shows overlapping artifacts due to lack of proper occlusion processin

Always focused image - Grid

Observed images while the focal length of the camera is changing. The displayed image remain clear, demonstrating always focused images of Maxwellian Near-to-eye displa

TORUS.avi

Numerical observation of the proposed mesh based computer generated hologram from different directions which shows continuous motion parallax of a complex torus object with proper occlusion

Always focused image - INHA logo

Observed images while the focal length of the camera is changing. The displayed image remain clear, demonstrating always focused images of Maxwellian Near-to-eye displa

Visualization 1: Calculation of reflectance distribution using angular spectrum convolution in mesh-based computer generated hologram

movie clip for uniform mesh phase simulation Originally published in Optics Express on 22 August 2016 (oe-24-17-19801

Visualization 2: Calculation of reflectance distribution using angular spectrum convolution in mesh-based computer generated hologram

movie clip for diffuse mesh surface simulation Originally published in Optics Express on 22 August 2016 (oe-24-17-19801

Speckle reduction for single sideband-encoded computer-generated holograms by using optimized carrier wave

Computer-generated holography (CGH) is an evolving field that facilitates three-dimensional displays, with speckle noise reduction being a pivotal challenge. In hologram synthesis, complex data with random phase distributions are typically employed as carrier waves for wide viewing angles and a shallow depth of field (DOF). However, these carrier waves are a source of speckle noise, which can significantly degrade image quality. In this paper, we propose a novel technique for speckle reduction for single sideband (SSB)-encoded holograms, applicable to any arbitrary 3D object. The proposed method focuses on optimizing the random carrier wave used in the hologram synthesis to achieve a uniform amplitude distribution at the object's location. This optimization results in a carrier wave that consistently exhibits uniform amplitude at specific depth planes, leading to a significant reduction of the speckle occurring from the carrier wave. The proposed method has been validated through simulations and optical experiments

[VAP]visualization2.mp4

Reconstructions at various depths of the composite hologram with occlusio

[VAP]visualization3.mp4

Reconstructions at various observation directions of the composite hologram with occlusio