使用手部動態輸入裝置操控虛擬空間中的3D設計物件

Abstract

最早當作輸入工具的靈感來源就是 ”手的動作 ”， Engelbart (1968)發表世界最早的滑鼠，其靈感即來自於利用手部的移動來操控電腦中的選單。但由於螢幕的限制，所以大多數的輸入裝置均設計成2D介面。設計者在2D的介面上做3D的設計時，仍然有許多的限制。雖然設計者可以藉著視角的改變來瀏覽虛擬環境，但這些動作仍然很難在2D的平面上操作。因此傳統的輸入裝置已無法滿足設計者的需求 (Tamotsu and Naomasa, 1994; Gross and Kemp, 2001)。所以就有了一些直覺性的空間輸入裝置出現，例如數據手套、感應球、空間滑鼠、3D滑鼠)…均是較常使用的空間輸入裝置 (Elsadek et al., 1998; Elsadek et al., 2001)，可是這些裝備都必須穿戴或是手持一些裝備，這對使用者而言仍不夠自然。 因此本研究不採用複雜的手勢輸入系統，而發展一套類似模擬滑鼠動作的光學操控空間輸入系統。能讓設計者在實體空間中藉由簡單直覺的手部動作操控虛擬環境中3D設計物件。本系統不需穿戴或是手持裝備能準確的在虛擬環境中做6個自由向度的空間移動，本研究稱之為”hand mouse system” (HMS)。HMS是由手部下方的紅外線測距感應裝置 (infrared distance measuring sensor) 所組成陣列裝置來感應手部在空間中的動作、方向及高度，並將所感應出之距離數值參數傳回控制系統，轉化為虛擬空間中物件的對應座標，藉以操控虛擬環境中的3D物件。

The earliest inspiration for input device is “hand”. Engelbart (1968) made public the first mouse in the world, and his inspiration came from using hand movement to control the menu on the computer. However, due to the limit of the monitor, most input devices are designed for 2D interface. Thus, users are confronted with a number of limitations when making 3D design on a 2D interface. Although perspectives and change of viewing angles can be applied to browse the virtual environment, it is still hard to operate the movements on a 2D interface. Thus, the traditional input devices can no longer meet the demands of designers (Tamotsu and Naomasa, 1994; Gross and Kemp, 2001). As a result, intuitive space input devices are introduced, such as “Data Glove”, “Force (space) balls”, “Space Mouse”, “3D Mouse”, which are commonly-used space input devices (Zimmerman et al., 1987; Li et al., 1997; Rosenberg and Slate, 1999; Chung, 2003; Hachet et al., 2003; Chen, 2004). As a result, this research presents an infrared-based space input system, which simulates hand movements and allows designers to control the input of 3D objects by simple and intuitive hand movements. Also, it allows natural operations. Without wearing or hand-holding any equipment, users are able to move freely in 6 degree of freedom (X, Y, Z). The system is called “Hand Movement System (HMS)”, which senses the hand movement in the space, direction and height with the arrayed device of the infrared distance measuring sensor underneath the hand, then transmits the measured parameters to the control system, and converts the data to corresponding coordinates of the virtual space for users to control the 3D objects in the virtual environment.