Quantization bit rate reduction in scanning tomographic acousticmicroscopy

摘要

The imaging capability of the scanning laser acoustic microscopenhas been enhanced by the addition of a quadrature detector fornholographic imaging and rotational and frequency-varying hardware forntomographic reconstruction. Because of the expansion of data acquisitionncapability, the memory-intensive demands placed on the processingncomputer by these modifications require efficient methods ofnrepresenting and storing the tomographic data while retaining thenquality of image reconstruction. This paper reports the performancenevaluation of low bit-rate data acquisition. Results show thenfeasibility of high-quality imaging at bit-rate savings at the level ofn33%