A ray-casting 3D object selection method based on backtracking pointing interaction history
A three-dimensional target and ray technology, applied in the field of human-computer interaction, can solve problems such as unreasonable and increased rays, and achieve the effects of improving accuracy, accurate ray-casting three-dimensional object selection, and reducing random jitter of equipment
Active Publication Date: 2020-06-30
ZHEJIANG UNIV
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But for 3D raycasting, since the user has no support plane to utilize, the possibility of the ray straying from the target object when the user presses the button increases significantly
Therefore, it is unreasonable to assume that the object the ray is aimed at when the user presses the button is the target object
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[0037] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be noted that the following embodiments are intended to facilitate the understanding of the present invention, but do not limit it in any way.
[0038] Such as figure 1 As shown, generally speaking, the user will not press the confirm button until he sees that the ray is aimed at the target object. Before the user presses the confirm button, the ray must intersect the object, so it is assumed that the ray has been aimed at the target object before the user presses the confirm button. Find the moment T when the user starts to make a decision S , the moment T when the user's decision-making ends E , to get the time interval [T Si , T E ], you can find the target object that the user wants to select based on the backtracking pointing interaction history.
[0039] This embodiment is carried out in a three-dimensional virtual reality (HT...
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The invention discloses a ray projection three-dimensional target selection technology based on the backtracking pointing interaction history. The technology comprises an offline modeling stage and anonline operation stage. The offline modeling is characterized by repeatedly collecting the user data to fit the relationship between a backtracking time interval and the size of an object; and the online operation is characterized by utilizing an established model to select a three-dimensional target object. The method comprises the following steps of (1) recording an interaction history of raysand the object; (2) calculating a time backtracking interval of each object in the interaction history according to an offline established time backtracking interval model; (3) calculating the matching degree of each object according to the time backtracking interval of each object in the interaction history; and (4) selecting an object with the highest matching degree. By utilizing the technology, the problem of low selection and identification accuracy of the ray projection three-dimensional target object caused by equipment jitter, natural jitter of the hand of the user and the Hessier effect can be effectively solved, and more accurate and natural three-dimensional object man-machine interaction is realized under the condition of not sacrificing the efficiency.
Description
technical field [0001] The invention belongs to the technical field of human-computer interaction, and in particular relates to a ray projection three-dimensional target selection technology based on backtracking pointing interaction history. Background technique [0002] Object selection technology is one of the core technologies in human-computer interaction. In human-computer interaction, before operating an object, it needs to be selected first. With the rapid development of virtual reality technology and augmented reality technology, the selection technology of three-dimensional objects in virtual environment has become a research hotspot in three-dimensional human-computer interaction due to its wide application value. [0003] The existing 3D object selection technologies are mainly divided into grasping or touch interaction technology and pointing interaction technology. Grab or touch interaction technology realizes selection by directly grabbing or touching the ta...
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IPC IPC(8): G06F3/01G06F3/0481
CPCG06F3/011G06F3/04815
Inventor 万华根陈恺奇韩晓霞
Owner ZHEJIANG UNIV