| In the vertical operation area of Leap Motion device,through the different heights of hands to manipulate the multi-layer discrete target selection task on the mapped screen,we can get suitable operational layer for user and corresponding human factors analysis and discussion.First of all,we can get the user’s commonly used vertical scope through the experiment,and then and then by choosing the time spent and Index of difficulty(ID)in task,the linear analysis is carried out to prove the suitability of the Fitts’ law model.Finally,Through the experiment we find that the task complexity of task time under full visual feedback and partial visual feedback to the linear fitting degree of are 0.766 and 0.771 respectively,the linear degree is relatively low,so the Fitts’ law model for multi layered interface under the discrete target selection task does not apply,and the analysis of the data of time and error rate has been concluded that the maximum number of possible layering for users with full visual feedback and partial visual feedback is 20 and 18 layers respectively,this research conclusion can provide the necessary design criterion for the technical design of the application scene based on multi-layer 3d interface.The purpose of this study:Exploring and studying techniques for layered input modality in non-contact interactive space: including how many layers of interactive operations can be divided into user-friendly interactive operations;conforming to user’s common interactive spatial range for human-computer interaction;precision,speed,etc.;requires a high operating range;whether it meets a series of problems with the Fitts’ law theorem.The main work of this article is as follows:1.Experiment 1 is to get the user’s common operating range.In the detectable range above Leap Motion,the experimenter operates a random target task in the experiment interface,completes the target selection task,and records the relevant gesture height and time.Integrate data analysis and finally come up with a common range that is more suitable for user operations.2.Experiment 2 is to obtain a higher range of recognition accuracy and efficiency.The experimenter uses the hierarchical color change of the operation task as a visual feedback,puts the right hand into or out of the detection area according to the color feedback to complete the corresponding gesture interaction task,and records the hand height and time information.This result can be applied to a special application.The scene provides the user with an accurate and rapid operating range area,and provides a design guide for using the spatial range for the interface design with very high spatial layered input accuracy requirements in the subsequent non-contact interactive interface.3.Experiment 3 is to obtain the number of user-operable layers that can be divided in the common range and whether the task meets the Fitts’ law model.In the range of 84-320(unit: mm)obtained in Experiment 1,the Fitts’ law model was first verified: in the experimental design,the width,distance,etc.of the click target to be completed in the experiment have been calculated;In the experiment,different click tasks were completed and the corresponding time was obtained;finally,the experimental results were analyzed by the data analysis software SPSS.Finally,according to the analysis results of the completion time and error rate data of each task,the corresponding boundary level is obtained.4.Finally,the number of layers that can be divided in the user’s usual range that can be operated above the Leap Motion hardware is met.This conclusion is also suitable for other three-dimensional position recognition devices such as Kinect.Therefore,the layering technique of the three-dimensional space operation area in the non-contact interactive interface is feasible to widen the bandwidth of input information. |
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