Color rendering of range in passive acoustic displays

Techniques for mapping image color to range in passive time‐bearing displays were explored. They included (1) a range‐focusing method wherein images focused at multiple ranges were combined; and (2) a parallax technique wherein images were formed with different subarray apertures. In both cases, a Hough transform based image processing method was used to enhance features and to compensate for degradation associated with combination of multiple images. Colormapping techniques were employed to render source ranges in color. The presentation will include a description of the methods and a discussion of their effectiveness under various conditions. [Work funded under ARL:UT IR&D program.]