360 degree images definition
categories: VR
- 360-degree video
https://en.wikipedia.org/wiki/360-degree_video
360-degree videos, also known as immersive videos[1] or spherical videos,[2] are video recordings where a view in every direction is recorded at the same time, shot using an omnidirectional camera or a collection of cameras. During playback on normal flat display the viewer has control of the viewing direction like a panorama. It can also be played on a displays or projectors arranged in a sphere or some part of a sphere.360 Degree Video is an immersive video format consisting of a video – or series of images – mapped to a portion of a sphere that allows viewing in multiple directions from a fixed central point.
The mapping is usually carried out using equirectangular projection, where the horizontal coordinate is simply longitude, and the vertical coordinate is simply latitude, with no transformation or scaling applied. Other possible projections are Cube Map (that uses the six faces of a cube as the map shape), Equi-Angular Cubemap – EAC (detailed by Google in 2017 to distribute pixels as evenly as possible across the sphere so that the density of information is consistent, regardless of which direction the viewer is looking), and Pyramid (defined by Facebook in 2016).
This type of video content is typically viewable through a head-mounted display, mobile device, or personal computer and allows for three degrees of freedom (see section 4.2 for an explanation of the concept of degrees of freedom).
https://xrsi.org/definition/360-degree-video - 360 Degree Video is Not Virtual Reality
https://www.theprimacy.com/blog/360-degree-video-is-not-virtual-reality/
“In layman’s terms, 360 means it surrounds you. 3D means it has depth, like looking at a landscape, you’ll notice that there are objects closer to you, and objects that are further away. An image can be 360 and not 3D, or 3D and not 360, but keep in mind the distinction.”
- for more advanced definition of 360-degree videos and in conjunction with virtual experience (VX) and immersive reality in
Engberg, M., & Bolter, J. D. (2020). The aesthetics of reality media. Journal of Visual Culture, 19(1), 81–95. https://doi.org/10.1177/1470412920906264