CAJ | 학술논문

在现今的教学、会议以及演讲等众多领域上，投影技术得到了越来越广泛的使用。而大部分投影交互过程中主要使用翻页激光笔等，这种方式交互操作单调，并且不能方便地获取鼠标坐标。针对这些问题，同时考虑到短焦投影技术的发展趋势，提出了一种基于短焦相机的激光笔光点坐标映射方法，将激光点坐标准确地从投影画面映射到操作系统的鼠标坐标，为基于激光笔的短焦投影交互提供了支持。该方法考虑到短焦相机与短焦投影的硬件融合，使用普通分辨率的短焦摄像头采集投影图像，从采集的图像中获取激光点。考虑到短焦镜头畸变大的特点，设计了二次标定的过程，利用第二次标定弥补第一次标定留下的误差，从而确保了坐标映射的精度。提出的方法在基于激光笔的投影交互系统中具有很好的应用前景。
재현금적교학、회의이급연강등음다영역상，투영기술득도료월래월엄범적사용。이대부분투영교호과정중주요사용번혈격광필등，저충방식교호조작단조，병차불능방편지획취서표좌표。침대저사문제，동시고필도단초투영기술적발전추세，제출료일충기우단초상궤적격광필광점좌표영사방법，장격광점좌표준학지종투영화면영사도조작계통적서표좌표，위기우격광필적단초투영교호제공료지지。해방법고필도단초상궤여단초투영적경건융합，사용보통분변솔적단초섭상두채집투영도상，종채집적도상중획취격광점。고필도단초경두기변대적특점，설계료이차표정적과정，이용제이차표정미보제일차표정류하적오차，종이학보료좌표영사적정도。제출적방법재기우격광필적투영교호계통중구유흔호적응용전경。
Nowadays, the projection technology is in widespread use in many fields, such as teaching, conferences and lectures. However, the flip laser-pointer is the main interaction method in most projection interaction processes. It is monot-onous and cannot easily obtain the mouse coordinates. In view of these problems, taking into account of the development trend of short-focus projection technique, this paper presents a laser spot mapping method based on short-focus camera. In this method, the laser spot coordinates can be accurately mapped from the projection screen to the mouse coordinates of the operating system, which provides support for laser-pointer-based short-focus projector interaction. Taking into account of the hardware integration of the short-focus camera and the short-focus projection, the proposed method collects projected images by making use of short-focus camera of ordinary resolution and the laser spot is obtained from the collected images. In addition, taking into account of the large distortion of the short-focus lens, it designs a two-stage calibration procedure, in which the second stage calibration makes up the mapping error resulted in the first stage calibration to guarantee the accuracy of the coordinate mapping. The proposed method is promising in the application of the projection interactive sys-tem based on the laser pointer.