[[["わかりやすい","easyToUnderstand","thumb-up"],["問題の解決に役立った","solvedMyProblem","thumb-up"],["その他","otherUp","thumb-up"]],[["わかりにくい","hardToUnderstand","thumb-down"],["情報またはサンプルコードが不正確","incorrectInformationOrSampleCode","thumb-down"],["必要な情報 / サンプルがない","missingTheInformationSamplesINeed","thumb-down"],["翻訳に関する問題","translationIssue","thumb-down"],["その他","otherDown","thumb-down"]],["最終更新日 2025-08-17 UTC。"],[],[],null,["# Object tracking\n\n*Object tracking* can track multiple objects detected in an input video or video\nsegments and return\nlabels (tags) associated with the detected entities along with the location of the entity in\nthe frame.\n| **Note:** There is a limit on the size of the detected objects. Very small objects in the video might not get detected.\n\nObject tracking differs from\n[label detection](/video-intelligence/docs/analyze-labels). While label\ndetection provides labels for the entire frame (without bounding boxes),\nobject tracking detects individual objects and provides a label along with\na bounding box that describes the location in the frame for each object. For example, a video\nof vehicles crossing an intersection may produce labels such as \"car\" , \"truck\",\n\"bike\", \"tires\", \"lights\", \"window\" and so on. Each label includes a series\nof bounding boxes showing the location of the object in the frame.\nEach bounding box also has an associated time segment\nwith a time offset (timestamp) that indicates the duration offset from\nthe beginning of the video. The annotation also contains additional entity\ninformation including an entity id that you can use to find more information\nabout that entity in the\n[Google Knowledge Graph Search API](https://developers.google.com/knowledge-graph/).\n\nTo make an object tracking request, call the\n[`annotate`](/video-intelligence/docs/reference/rest/v1p2beta1/videos/annotate)\nmethod and specify\n[`OBJECT_TRACKING`](/video-intelligence/docs/reference/rest/v1p2beta1/videos#Feature)\nin the `features` field.\n\nCheck out the [Video Intelligence API visualizer](https://zackakil.github.io/video-intelligence-api-visualiser/#Object%20Tracking) to see this feature in action.\n\nFor an example, see [Object Tracking](/video-intelligence/docs/object-tracking)\nand [Shot Change Detection](/video-intelligence/docs/shot-detection) tutorial."]]