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首页> 外文期刊>ICES Journal of Marine Science >Estimation of shrimp (Pandalus borealis) carapace length by image analysis
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Estimation of shrimp (Pandalus borealis) carapace length by image analysis

机译：通过图像分析估算虾（甲壳虫）的甲壳长度

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An image analysis technique was examined to assess its ability to estimate automatically the carapace length of shrimp (Pandalus borealis). Carapace length, pixel area, and weight were measured in a sample of 285 shrimp. An accurate slide calliper was used to measure the carapace length (13-30 mm) by an experienced operator with a precision (standard deviation) of ～0.2 mm. A high-resolution still image camera was used to produce an 1810 x 1710 pixel colour image containing all 285 shrimp. The individual shrimp were segmented from the background by intensity thresholding. A linear model on a log-log scale of length in relation to pixel area yielded a precision of 0.43 mm. Despite differences in precision, the length frequency distributions based on manual and imaging techniques were similar. The central processing unit time spent by the image analysis program was < 0.01 s per shrimp. This indicates the potential for precise, efficient, automatic processing of large numbers of shrimp lengths by, for example, video records of shrimp on a moving transport band.
机译：检查了图像分析技术，以评估其自动估计虾（Pandalus borealis）的甲壳长度的能力。在285只虾的样品中测量了甲壳的长度，像素面积和重量。经验丰富的操作员使用精确的游标卡尺测量甲壳长度（13-30毫米），精度（标准偏差）为〜0.2毫米。使用高分辨率的静止图像相机生成包含所有285只虾的1810 x 1710像素彩色图像。通过强度阈值将单个虾从背景中分割出来。长度相对于像素面积的对数对数刻度的线性模型产生的精度为0.43 mm。尽管精度有所不同，但基于手动和成像技术的长度频率分布却相似。图像分析程序花费的中央处理单元时间为每只虾<0.01 s。这表明，例如，通过移动运输带上的虾的视频记录，可以精确，高效，自动地处理大量虾，这具有潜力。

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