Patent ID: 7783440
Filing Date: 2010-08-24
Classification: H04N

Abstract:
1. A method for obtaining a modulation transfer function (MTF) of an electro-optical device using an image of a knife-edge target, the method comprising the steps of: (a) obtaining edge response data points, wherein a data point includes a perpendicular distance, d, to the knife-edge target; (b) constructing a sequence of line slopes of the edge response data points, wherein a line slope includes a spread of edge response data points; (c) selecting a line slope that minimizes the spread of edge response data points; (d) calculating the MTF, based on the edge response data points included in the line slope selected in step (c); and (e) providing the MTF to a user; wherein step (c) includes using least squares regression to minimize the spread of the edge response data points.