Title: Coordinate transformation method for digital scanning change-over device and processor
Application Number: 03140015 Application Date: 2003.07.29
Publication Number: 1492313 Publication Date: 2004.04.28
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: A61B8/00,G06F7/00,G06G7/22
Applicant(s) Name: Mairui Biological Medical Electronics Co., Ltd., S Address: 518057
Inventor(s) Name: He Xujin
Attorney & Agent: chen hongyin
Abstract:
     The coordinate transformation method and processor for digital scanning converter is used to transform the rectangular coordinate values (x0, y0) into polar coordinate values (r, p). The transformation method includes initialization; pre-treatment; CORDIC algorithm including a times of left-shift iterative operation and (N-a) times of right-shift iterative operation; radius correction and phase correction. The optimal implementation example of the processor includes input module, pre-treatment module, iterative operation module, radius correction module, phase correction module and output module. The coordinate transformation method and processor may be used in digital scanning converter of B-type ultrasonic imaging instrument for regulating precision, speed and other performance parameters flexibly.
Time: 7