Edge Tracing by Hysteresis

Edge tracing by hysteresis is a technique used in image processing to detect the boundaries of objects within an image. It involves two threshold levels: a high and a low. Pixels with intensity above the high threshold are confidently identified as edges. Pixels below the low threshold are disregarded. Pixels between the two are considered potential edges and are only accepted if they connect to strong edges identified earlier. This approach ensures continuous, accurate edges by reducing noise and preventing fragments, resulting in a clear outline of objects while minimizing false detections.