This paper attempts to extract data for forest crowns analysis by the determining same color regions method of image processing. For the analysis of crown size aerial photographic RGB images of broad leaved forest, also of Cryptomeria japonica and Chamaecyparis obtuse forest, of a Northern Kyushu Satoyama Rural Forest were utilized. The Image color distribution was used as an image feature. At first, the circle was calculating at every pixel less than the range of the determined standard value (h) of the color. Next, diffuseness information such as shadow areas and overlapping circles were eliminated from images. Remaining dot images were the processing data for the crown. In each of the research plot, verification data of crown width and number was ascertained by observations, and then compared with processed data. As a result, broad leave forest was determined have the best accuracy for extracting crown width at h: 40, and Cryptomeria japonica and Chamaecyparis obtuse forests were h: 15 to 20. However crown numbers were counted at less than 50% of the original images, because of the characteristics of this image processing method.
|Translated title of the contribution||The Analysis of Forest Crowns by Determining Same Color Regions in Aerial Photograph Images of a Northern Kyushu Satoyama Rural Forest(PAPERS OF THE 21th SCIENTIFIC RESEARCH MEETING)|
|Number of pages||4|
|Journal||ランドスケープ研究 : 日本造園学会誌 : journal of the Japanese Institute of Landscape Architecture|
|Publication status||Published - Mar 31 2003|
朝廣和夫, 井上光平, 上原三知, 重松敏則, & 瀬戸島政博 (2003). 空撮画像の同質領域判定による九州北部里山林の樹冠抽出に関する研究(平成15年度日本造園学会全国大会 研究発表論文集(21)). ランドスケープ研究 : 日本造園学会誌 : journal of the Japanese Institute of Landscape Architecture, 66(5), 499-502. https://doi.org/10.5632/jila.66.499