基于语义特征的草莓目标双目匹配方法研究
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国家重点研发计划项目(2018YFC1602701)和北方工业大学1138工程项目(110051360022XN108)


Binocular Matching Method for Strawberry Targets Based on Semantic Features
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    摘要:

    基于双目相机的目标定位系统具有起始距离短、精度高、成本低的优点,适用于空间受限的温室草莓生产环境下的草莓目标识别与定位应用。准确的目标匹配是双目相机实现有效测量的保障,但自然环境下草莓表面亮度和阴影区域变化较大,基于局部特征的双目匹配方法难以获得稳定且准确的匹配结果。本文研究了基于图像语义特征的草莓目标双目匹配方法,在光照变化大、图像纹理丰富、果实遮挡、图像模糊等条件下语义特征能够保持目标描述的稳定性,因此可提高草莓目标双目匹配的准确性。首先设计了图像中草莓目标区域的语义特征提取方法,其次设计了基于语义特征的草莓目标相似度计算方法以及双目结构的几何约束条件,最终实现了温室环境下草莓目标双目匹配。实验结果表明:温室环境下本文方法的草莓目标匹配正确率为96.3%,可为实际采摘环境下草莓目标双目定位系统提供良好的目标匹配结果。

    Abstract:

    The binocular camera-based target localization system has the advantages of short starting distance, high accuracy, and low cost, which is suitable for strawberry target identification and localization applications in space-constrained greenhouse strawberry production environments. Accurate target matching is the guarantee of the effectiveness of binocular camera measurements, but the surface brightness and shadow areas of strawberries vary greatly in natural environments, and it is difficult to obtain stable and accurate matching results with the binocular matching method based on local features. A binocular strawberry target matching method was investigated based on image semantic features, which can maintain the stability of the target description under the conditions of large illumination changes, rich image texture, fruit occlusion, image blurring, etc., and therefore can improve the accuracy of binocular strawberry target matching. The semantic feature extraction method of the strawberry target region in the image was firstly designed, and secondly the strawberry target similarity calculation method was designed based on the semantic features and the geometric constraints of the binocular structure, and finally the binocular strawberry target matching in the greenhouse environment was realized. The experimental results showed that the correct rate of strawberry target matching applied to the greenhouse environment by the method was 96.3%, which can provide good target matching results for the strawberry target binocular localization system under the actual picking environment.

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毕松,张东航.基于语义特征的草莓目标双目匹配方法研究[J].农业机械学报,2025,56(5):415-424. BI Song, ZHANG Donghang. Binocular Matching Method for Strawberry Targets Based on Semantic Features[J]. Transactions of the Chinese Society for Agricultural Machinery,2025,56(5):415-424.

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  • 收稿日期:2024-03-08
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  • 在线发布日期: 2025-05-10
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