ANALISIS HASIL PENGUJIAN KAYU YANG DISERANG PENGGEREK KAYU DI LAUT DENGAN INTERPRETASI GAMBAR DIGITAL

Abstract

Natural durability is determined through the tests of wood against wood attacking organisms. Natural durability of wood against marine borer was tested by exposing wood into the open sea water for six months. Damage intensity can be measured on the basis of digital image using Image-J software. This paper studies natural durability of nine wood species from Sumatera, Java and Kalimantan against marine borer. Results show that sempur lilin (Hoogl.), bambang lanang (L.var.) and kayu bawang ((Jack) Jacobs) were clasified into class durability I (very resistant), while cangcaratan ((Blume) Rehd. and aveangkelalai (ssp.) were classified into class durability II (resistant) against marine borer. Ki pasang (Miq.) and segelam () were grouped into class durability III (moderately resistant), while ki bugang (Blume) and ki langir (Blume) fall into class durability V (perishable). Damage intensity could be measured accurately using Image-J software. However, this method obtained higher damage percentage since the ex-rope hole was included in the measurement. Accordingly, the image method should be modified by excluding the ex-rope image to achieve high accuracy measurement.