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When the ground truth is given, performance evaluation can be readily carried out by comparing detected edges with the ground truth edges.

当有背景时，性能评估可以通过将检测到的边界与真实背景作比较得出。

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After tested with the ground survey, the classification results accord with the ground truth in the main. And we got higher classification accuracy.

经地面调查检验，分类结果与实际下垫面情况基本吻合，分类精度较高。

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Curiosity's discovery at its landing site in the equatorial Gale Crater provides the first real ground truth for those observations.

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Since 2008, the firm's Ground Truth project has mashed together licensed data with information gathered by its own fleet of Street View cars and bicycles.

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The technology processes remote-sensing data, including data from the LANDSAT and RADAR satellites, in combination with ground truth data provided by a ground penetrating radar and other information drawn from geological, hydrogeological, geographical, hydrological and climate data and, when dealing with deep aquifers, seismological data.

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