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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >An evaluation of the analysis system of video transects used to sample subtidal epibiota
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An evaluation of the analysis system of video transects used to sample subtidal epibiota

机译：视频样带分析系统用于潮下附生菌取样的评估

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Two popular methods of benthic cover estimation (the point intercept technique with two sets of position points, and digital interactive color segmentation) were compared with an alternative method of digital cover estimation using Bezier curves as a tool for outlining the objects on an images and AutoCAD~(~R) software for the final evaluation of abundance. The comparison was done using still video images obtained from two 10-m transects on subtidal rocks off the Rimsky-Korsakov islands in the Sea of Japan (Russia). Ten rectangular sectors (1 x 0.4 m each) selected randomly within both video transects were analyzed. One-way ANOVA for repeated measurements was used to test the differences between methods. The point intercept technique differed significantly from both methods of digital estimation and had an essential positive bias. The Tukey multiple comparison test revealed the differences among digital estimation methods in the species, which have the complicated color with many contrast spots. The proposed approach using Bezier curves has an advantage over the interactive color segmentation if the objects under selection are lit at different levels or have a contrast coloration or are hidden by canopy organisms. Besides, estimation of cover in the field of AutoCAD~(~R) software is more precise and takes less time than that obtained using a scaled grid, available for automatically segmented species. The results showed that digital cover estimation using Bezier curves and AutoCAD~(~R) software is a convenient method for analyzing benthic samples at large spatial scales.
机译：比较了两种流行的底栖覆盖估计方法（具有两组位置点的点截取技术和数字交互式颜色分割），以及另一种使用贝塞尔曲线作为在图像和AutoCAD上勾画对象的工具的数字覆盖估计的替代方法。 〜（〜R）软件用于最终丰度评估。比较是使用从日本海（俄罗斯）里姆斯基-科萨科夫岛外的潮带下岩石上两个10米断面获得的静止视频图像完成的。分析了两个视频样带中随机选择的十个矩形扇区（每个1 x 0.4 m）。单向方差分析用于重复测量，以测试方法之间的差异。点截取技术与两种数字估计方法均存在显着差异，并且具有必不可少的正偏差。 Tukey多重比较测试揭示了物种中数字估算方法之间的差异，该物种具有复杂的颜色和许多对比点。如果所选择的对象以不同级别照明或具有对比色或被树冠生物隐藏，则使用贝塞尔曲线的拟议方法相对于交互式颜色分割具有优势。此外，与使用可自动分割的物种的缩放网格相比，AutoCAD〜（R）软件领域中的覆盖率估计更加精确且花费的时间更少。结果表明，使用Bezier曲线和AutoCAD〜（〜R）软件进行数字覆盖估计是一种在大空间尺度上分析底栖动物样本的便捷方法。

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