Background equalization for laser line scan data

摘要

A method of and sensor for processing a laser line scan image to enhance the portion representing otherwise obscure objects from background. Two contrast enhancement routines are applied to enhance obscured objects in the low signal strength regions. One is a background equalization routine employing an overlapping piecewise least squares error technique that equalizes the high/low signal strength regions. The second is a local histogram clipping routine that applies a moving window histogram clip to enhance details in the low strength regions without effecting the high strength regions.