How to Use the Roboflow Workflows Expression Block

Roboflow Workflows is a web-based application that enables users to build complex computer vision pipelines using a visual editor, allowing for the deployment of these workflows on various platforms such as the Roboflow cloud, NVIDIA Jetson, or other cloud providers like GCP and AWS. The guide illustrates how to use the Workflows Expression block to develop business logic by counting objects, such as determining if a retail checkout counter is occupied based on the number of people detected in an image. Users can configure various blocks, including input images, zones of interest, and object detection models, and utilize the Expression block to set conditions that return true or false based on specified thresholds. The system is tested by previewing the workflow, visualizing model predictions with bounding boxes, and deploying it to desired platforms, demonstrating the flexibility and functionality of Roboflow Workflows in creating scalable computer vision applications without the need for coding.