小葉南洋杉群植數量之偏好研究

A Study on Preference of the Number of Mass Planting of Araucaria heterophylla

本研究之目的乃在驗證小葉南洋杉群植之數量是否以奇數為佳及探討拍攝景觀的相極鏡頭及觀賞距離是否影響觀賞者的視覺偏好。期望透過本次之研究，能確認植栽數量原則之正確性，以提供日後進行植栽設計時之參考。在研究方法上，本研究係應用電腦影像技術建構模擬景觀，並控制樹木的排列狀況、環境光線、前景、背景及天空氣候狀況環境因子，及變化樹木株數（2至7株）、使用的相機鏡頭（35mm及50mm）及觀賞距離（50、75及100公尺）等變項，以測出對景觀偏好的影響程度。經過3D Studio電腦模擬軟體之操作，共得到36張模擬的幻燈片，並對台中市中興大學園藝系學生進行測試。結果顯示偏好的評估明顯地受景觀中樹木的株數、相機的拍攝鏡興頭及觀賞距離所影響。

The main purpose of this study was to testify if the landscape preference of the odd number of Araucaria heterophylla is better than that of the even number of Araucaria heterophylla when dong mass planting design. In addition, this study also discussed the influences of different lens of camera and different viewing distances on observers' visula preferences. It was expected that this study would certify the accuracy of the number of mass planting and provide references for future planting design.The study applied computer-image's technology to construct the experimental landscapes. For the experimental design, the study controlled the spatial arrgangment of trees, light, foreground, background, sky, different alternatives of the tree number in the simulated landscapes, different lens of camera, and different viewing distances in order to measure observers' visual preferences on the simulated landscapes. The study obtained 36 landscape slides by using 3D Studio software, camera. Fuji RD 135, aperture 4, shutter 1/2 second. The 36 landscape slides were rated from 1(extremely dislike) to 10 (extremely like) by undergraduate students majored in horticulture at National Chung-Hsing University.The results showed that visual preference ratings were significantly influenced by the number of trees in the landscape, by the different lens of camera, and by the different viewing distances.