包裹计数

识别传送带上逐一经过的快递包裹，对包裹数目进行实时统计.
精度对应场景或者限制条件
1）场景限定：支持快递分拣中心，传送带上运动包裹的统计计数；支持盐厂传送带工况下，规则纸箱计数。
2）图片分辨率：1200*800。
3）设备/镜头：需使用指定品牌的3d结构光双目相机。
4）视野大小：1000*800*600（长、宽、高）单位：mm。
5）识别的种类：纸箱、邮政袋、软包装包裹、麻袋 6）包裹最小尺寸： 50*40pixels

Identify and perform real-time counting of express packages passing sequentially on conveyor belts.
Scenarios and constraint conditions corresponding to accuracy:
1. Scene limitations: Supports statistical counting of moving packages on conveyor belts in express sorting centers; supports counting of standard cartons under conveyor belt operating conditions in salt factories.
2. Image resolution: 1200*800.
3. Equipment and lens: A specified-brand 3D structured light binocular camera is required.
4. Field of view size: 1000*800*600 (length, width, height), unit: mm.
5. Recognizable object categories: Cartons, postal bags, soft-packaged parcels, and gunny sacks.
6. Minimum package size: 50*40 pixels.