問卷輸入系統自動調整最佳攝距參數研究

Study of the Automatic Adjustment on the OptimalShooting Range for Questionnaire Input System

問卷調查不但是現今各類科學研究蒐集資料經常使用的方法，在職業安全衛生領域中亦扮演著相當重要的角色，研究中為求分析的數據能有足夠的準確性及代表性，往往需要發放與回收相當數量的問卷，若利用機器視覺進行大量問卷的快速辨識，必會遭遇攝距逐漸降低的情形，以往需藉著手動調整攝距參數，才得以達到準確定位的目的。因此本研究之動機係在發展最佳攝距參數自動調整功能，利用迴歸分析找出定位標距離與最佳攝距參數之關係，接著進行程式設計，將其整合入原系統，使其具有精確定位的能力。辨識實驗結果之WSR test分析顯示，自動攝距調整功能，對於降低ROI框心與答案框心間之距離誤差像素值，具有統計上顯著的意義，因此能增加問卷辨識之準確性，使此系統能夠發揮更大的功效。

Questionnaire Surveys are often used to collect information in a variety of scientific researchfields, especially in one of occupational safety and health. For the accuracy and representative ofthe collected information, people usually administer a considerable amount of questionnaires. Usingmachine vision to process a large amount of questionnaires, researchers would inevitably face the factthat the shooting distance will be decreasing as the process goes along. They needed to manually adjustthe parameter of the shooting range in order to be able to locate the checkboxes therein. The goal ofthis work is to develop the automatic adjusting function of the optimal shooting range for the existingsystem. By generating a higher power regression equation between the distances of the locating marksand the optimal shooting range parameters, the system is programed with the automatic function inaccordance with the equation. The WSR test on the experiment results show statistically that thisdeveloped automatic functions can effectively reduce the errors between the aiming ROI centers andthe aimed checkbox centers. Therefore, the revised system not only can increase the accuracy of thequestionnaire recognition, but also raise the efficacy for the software usage.