Based on the information provided in the extracts, you can use the process_frame() function to count the number of objects in a zone. This function uses the predictions from the YOLOv8 model to count objects in a zone and plot those zones.
In this code, detections.class_id == 0 is used to filter the detections for a specific class of objects. If you want to count different objects, you would need to adjust this filter to match the class IDs of the objects you want to count.
However, the extracts do not provide information on how to get the total count of different objects. You might need to modify the process_frame() function to keep track of the counts for each object type.
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