パソコンによる画像処理を利用した露天採掘跡地の景観評価

抄録

Landscape evaluation of mined-out quarry becomes necessary from the view point of environmental protection. Computer graphics is useful to simulate landscape changes caused by open-cut mining. We have used a wire frame model and a polygon model to predict changes in the geographical feature of quarry. In this study, we examined the composition of the photomontage of mined-out quarry using an color image processing technology with personal computer. It became possible to present changes in the scene more realistically.
Two psychometrical evaluation tests, rating-scale and selection method, using monochrome and color photomontages as variable stimulus were conducted. The allowable limit of the apparent height of mining slope was revealed to be lower in the evaluation test with color photomontages as compared to the one with monochrome photomontages. This is because mined-out area stood out in respect of color against the surrounding greens. It was considered that the results obtained using color photomontages were more reliable than those using monochrome photomontages.
Cluster analysis was performed using the evaluation results of semantic differential method, which clarified that the factor of landscape evaluation of mined-out quarry changed in distance. Size scale and beauty scale were important when it was seen at a short distance, whereas impression impact was important when it was seen at a long distance.