👉 Roi, also known as a ROI (Rectified-Oriented Image), is an image processing technique that refers to the process of converting an input image into a region-of-interest (ROI) by applying a specific set of filters and parameters. The ROI represents the boundaries or regions of interest in the image, which are defined by a series of predefined filters applied at different points in the image. In ROIs, the filters used can vary widely depending on the specific application and its requirements.