Perceptually guided computer-generated holography

Abstract

Computer-Generated Holography (CGH) promises to deliver genuine, high-quality visuals at any depth. We argue that combining CGH and perceptually guided graphics can soon lead to practical holographic display systems that deliver perceptually realistic images. We propose a new CGH method called metameric varifocal holograms. Our CGH method generates images only at a user's focus plane while displayed images are statistically correct and indistinguishable from actual targets across peripheral vision (metamers). Thus, a user observing our holograms is set to perceive a high quality visual at their gaze location. At the same time, the integrity of the image follows a statistically correct trend in the remaining peripheral parts. We demonstrate our differentiable CGH optimization pipeline on modern GPUs, and we support our findings with a display prototype. Our method will pave the way towards realistic visuals free from classical CGH problems, such as speckle noise or poor visual quality.

Flexible modeling of next-generation displays using a differentiable toolkit

“…Creating high-quality, artifact-free optical reconstructions in real-time using CGH is a difficult task due to the complex relationship between the desired visuals and the holograms that need to be computed. 10 Conventional display techniques, such as gaze-contingent approaches, have been shown to reduce the demands on hardware and computation. 11 The question of whether utilizing perceptual relations such gaze-contingency in CGH can be used to effectively meet the demands of the human visual system in practice is an area of ongoing research.…”

19‐4: Improving Defocus Blur in Holographic Displays

“…Our choice for light transport model is bandlimited angular spectrum (11). For our implementation we relied on the differentiable form of it that is available in our scientific computing library for optics, computer graphics and visual perception (12). For optimizing holograms, we used this forward model in SGD based optimization with phase update that is constrained with DP method.…”

Waveguide Holography: Towards True 3D Holographic Glasses

“…It also offers unique benefits such as aberration-free high resolution images, per-pixel depth control, vision correction functionality [16][17][18] , as well as large color gamut. Recently, a lot of progress has been made in the field of computer-generated hologram (CGH) rendering, getting more attentions from the industry [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33] . Many conventional issues of holographic displays such as speckle, image quality issue, and heavy computation load are demonstrated to be solved by aid of better CGH rendering model and improved computation power of recent graphics processing units (GPU) [34][35][36][37] .…”