Abstract: An edge locator processor having memory and which employs a generalized biased centroid edge locator process to determining the leading edge of an object in a scene moving in a generally horizontal direction across a video screen. The generalized biased centroid edge locator process includes defining a gate and determining the centroid position for that portion of the object within the gate. This occurs for a succession of gates, until predetermined conditions are met. By constructing this series of successively expanding gates, a left gate edge position and centroid position may be determined for each gate to define a series of left edge and centroid positions. These values may be linearly correlated to provide a slope and an intercept, from which the edge may be determined.