Parallel multi-touch technology in Huaping multi-scenario
technical background
Multi-touch technology originated in the 1970s. In recent years, this technology has received more and more attention. It has developed in different industries and the speed of development is amazing. The release of Windows 7 supporting multi-touch technology in October 2009 announced the arrival of the multi-touch era. The Microsoft surface with multi-touch function and the recent iPhone4S are the fashion frenzy.
Multi-touch is a multi-point or multi-user interactive operation mode on the same display interface, which eliminates the single point operation mode of the keyboard and mouse. The user can make a single touch with both hands, and can also touch the screen with different gestures such as clicking, double clicking, panning, pressing, scrolling and rotating, so as to achieve arbitrary and better understanding of the relevant features of the object, for example, text, Video, pictures, satellite, 3D simulation and other information.
Although the current touch screen is mainly used in small and medium-sized electronic products such as mobile phones, with Intel launching the Ultrabook prototype equipped with win8 system at IDF conference, and displaying ten-point touch technology, the medium and large size of multi-touch The application space of the touch screen market will be further expanded. The "multi-point large touch screen era" after the "physical button era" has arrived. Such as multi-touch conference table, using paperless office mode, no need to carry a personal notebook, you can use the projector without a projector, through the large desktop display screen, many people can discuss the same problem, modify the same drawing, edit the traditional The conference mode makes communication more enjoyable and allows creativity to burst out at any time.
Multi-touch application development undoubtedly requires touch hardware support. Although many hardware supports standard protocols such as HID protocol and TUIO protocol, even when we get the information of touch points, how to parse into operations is more or less a cumbersome task. Although some hardware vendors offer some simple gesture development interfaces, they only target their own touch hardware devices. For example, the release of Microsoft Windows 7 provides a better development interface for multi-touch development, but it develops a few multi-touch applications: one is that it limits the touch-based HID protocol, and the other is that it binds touch messages to the window. The third is its "window limitation", which does not reflect true collaborative operations and parallel operations.
Huaping launches multi-touch system with parallelism in multiple scenes
Based on the above problems, Huaping has invented a multi-touch multi-touch gesture feedback system with multiple scenarios, which is applied to electronic devices loaded with multiple applications. The system includes:
Touch data server: monitor touch data signals, parse and send touch data signals according to a pre-configured touch protocol;
Touch data parser: respectively connected to the touch data server, corresponding to each application, respectively listening to the received touch data signal, determining whether the touch data signal is valid data acting on a touch scene, and transmitting touch feedback;
Application executor: Connected to a touch data parser, respectively, for establishing a physical application scenario, receiving touch feedback, and performing touch feedback.
Figure 1: Multi-touch gesture feedback system with parallelism in multiple scenarios
Huaping parallel multi-touch system works
When parallel multi-touch operation is performed in multiple scenarios, the signal monitoring module in the touch data server monitors the touch data signal according to the corresponding protocol, and the parsing module parses the data signal, and the pre-processing module will parse the touch. The position information of the point is converted into the coordinate data of the screen, and the state signal of the touch point is converted into state data such as pressing, updating, bounce, etc., and according to the touch signal amount, the touch pressure strength, the touch effective range, and the touch reliability To determine the validity of the touch point (to prevent false touch or false pop-up state during touch); then the data analysis source module will touch the touch point position information, the touch point status signal, the runtime unique mark touch finger identification and the like touch data The signal is sent to the touch data parser.
After receiving the touch data signal, the monitoring management module of the touch data parser registers the scene container with the touch data server, and then the scene data parsing module configures the touch gesture corresponding to the application and the parsing algorithm for storing and calling the gestures, and touches The gesture feedback is sent to the upper application interface, and the upper application interface sends the gesture feedback to the application executor, and the application executor establishes the application scenario, receives the touch feedback, and performs the touch feedback.
The touch gesture analysis algorithm includes parsing processing of various gestures, such as dynamic gesture real-time parsing, common click gesture parsing, directional gesture parsing, and custom touch trajectory gesture parsing. Touch the scene gesture and its gesture description, as shown in Table 1:
Table 1: Touch scene gesture table
Technical advantages of Huaping parallel multi-touch system:
1. For a specific scenario, the specific operation analysis mode can be customized according to the response touch required by the specific scenario, which is easy to input the multi-touch into one or more operations, and improves the analysis efficiency;
2. Realized automatic classification and independent analysis of touch data;
3, covering common gestures, supporting arbitrary track gestures, with good scalability and practicality;
4. The need for multi-tasking applications is solved, the efficiency of the application is improved, and the limitation of providing touch services for a single application or a single scene at the same time caused by the port or device being occupied is solved.
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