基于计算机视觉的岱衢族大黄鱼选育群体外形特征模式识别方法

通过计算机视觉测定岱衢族大黄鱼F2、F3 代2 类选育群体的24 个形态参数，利用主成分分析（principalcomponent analysis, PCA）和连续投影算法（successive projections algorithm, SPA）对形态参数进行特征提取和选择，获得PCA变换主元特征、PCA选择特征和SPA选择特征3 组不同的特征变量集，最后以特征变量集为输入建立岱衢族大黄鱼F2、F3代选育群体的稀疏表示识别模型。PCA、SPA特征提取和选择结果表明，全长/体长、全长/头长、全长/尾柄长、体长/头长、尾柄长/尾柄高是反映岱衢族大黄鱼F2、F3代选育群体之间形态差异的主要特征变量。稀疏表示模型的识别结果表明：3 组特征变量集对岱衢族大黄鱼F2、F3代选育群体样本都能较好地进行识别，平均识别准确率为88.3%、79.0%、80.5%；其中PCA变换主元特征对岱衢族大黄鱼F2、F3代的识别准确率最优，为88.3%。本研究结果为建立岱衢族大黄鱼外形指标及开展外形评价提供了有效手段。 通讯作者: 余心杰（https://orcid.org/0000-0002-6462-3931） E-mail: xjyu1979@163.com
Abstract: A pattern recognition method based on computer vision was developed for the identification of Daiqu large yellow croaker. First, 24 morphological parameters of Daiqu large yellow croaker were measured for both F2 and F3 generations by computer vision technology. Then principal component analysis (PCA) and successive projections algorithm (SPA) were respectively applied to extract and select the measured morphological parameters, and then obtained three groups of different characteristic variable sets, which were PCA transformed feature, PCA selected feature, SPA selected feature, respectively. Finally, respectively. Finally, sparse representation (SR) models were built for identificating the F2 and F3 generations of Daiqu large yellow croaker by using the extracted morphological features. The results indicated that the main morphological features for the identification of Daiqu large yellow croaker were total length/body length, total length/head length, total length/caudal peduncle length, body length/head length and caudal peduncle length/caudal peduncle height. The results of SR models showed that the three groups of characteristic variable can effectively identify the F2 and F3 generations of Daiqu large yellow croaker, with the average recognition accuracy of 88.3%, 79.0% and 80.5%; among them, the best SR model with PCA transformed feature achieved an average accuracy of 88.3% for the identification of Daiqu large yellow croaker. This study provides an effective way to establish shape index and carry out shape evaluation research of Daiqu large yellow croaker. Key words: large yellow croaker computer vision group recognition morphological characteristics sparse representation