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相关概念视频

Depth Perception and Spatial Vision01:15

Depth Perception and Spatial Vision

605
Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.
605
Upsampling01:22

Upsampling

214
Managing signal sampling rates is essential in digital signal processing to maintain signal integrity. A decimated signal, characterized by a reduced frequency range due to its lower sampling rate, can be upsampled by inserting zeros between each sample. This upsampling process expands the original spectrum and introduces repeated spectral replicas at intervals dictated by the new Nyquist frequency. To refine this zero-inserted sequence, it is passed through a lowpass filter with a cutoff...
214
Downsampling01:20

Downsampling

135
When considering a sampled sequence with zero values between sampling instants, one can replace it by taking every N-th value of the sequence. At these integer multiples of N, the original and sampled sequences coincide. This process, known as decimation, involves extracting every N-th sample from a sequence, thereby creating a more efficient sequence.
The Fourier transform of the decimated sequence reveals a combination of scaled and shifted versions of the original spectrum. This...
135

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相关实验视频

Updated: Jun 12, 2025

High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
11:34

High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques

Published on: December 3, 2013

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适应性QP算法用于深度范围预测和虚拟现实视频编码过程中的编码输出.

Hui Yang1, Qiuming Liu1, Chao Song1

  • 1School of Software Engineering, Jiangxi University of Science and Technology, Nanchang, China.

PloS one
|September 25, 2024
PubMed
概括
此摘要是机器生成的。

本研究介绍了视频编码的深度分区自适应策略,显著减少位率和编码时间,同时保持高视觉质量. 该方法优化了360度虚拟现实视频的编码,提高了高分辨率内容的效率.

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Virtual Prism Adaptation Therapy: Protocol for Validation in Healthy Adults
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10:16

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相关实验视频

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11:34

High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques

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Virtual Prism Adaptation Therapy: Protocol for Validation in Healthy Adults
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Virtual Prism Adaptation Therapy: Protocol for Validation in Healthy Adults

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Digital Inline Holographic Microscopy DIHM of Weakly-scattering Subjects
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Digital Inline Holographic Microscopy DIHM of Weakly-scattering Subjects

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科学领域:

  • 计算机科学 计算机科学
  • 视频压缩技术视频压缩技术

背景情况:

  • 视频编码复杂性和流量大小的减少对于高效的数据传输至关重要.
  • 优化编码性能和压缩对于高分辨率视频至关重要,特别是在虚拟现实应用中.

研究的目的:

  • 开发一个深度预测分区编码策略,以减少编码复杂性和流量大小.
  • 为了提高360度虚拟现实视频的编码性能和压缩效率.
  • 为了实现视频扭曲和流量大小之间的最佳平衡,同时保持质量.

主要方法:

  • 利用快速的战略决策方法来优化模式选择.
  • 根据用户的注意力,为赤道和极地地区量身定制的适应量化参数调整策略.
  • 采用了视频编码的深度分区自适应策略.

主要成果:

  • 实现了2.92%的最大比特率降低和1.76%的平均降低.
  • 平均编码时间减少了39.28%,质量损失最小 (平均重建质量为0.043).
  • 在4K,6K和8K视频序列中表现出卓越的性能.

结论:

  • 拟议的深度分区自适应策略显著提高了视频编码质量和效率.
  • 该战略有效地提高了编码效率,同时保持了高分辨率内容的视频质量.
  • 这种方法为管理流量大小和在VR视频交付中保持视觉保真提供了可行的解决方案.