Optmization of ultrasound bemforming sound velocity using coefficients in bilateral filterig

• Main Authors: Yu-Fa Lo, 羅煜發
• Other Authors: Che-Chou Shen
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/6z3gkp

碩士 === 國立臺灣科技大學 === 電機工程系 === 106 === In ultrasonic mode (Bmode) imaging, beam imaging usually estimates the position of the object by the concept of time delay, and judges the optimal sound velocity of the image by comparison analysis after imaging. The result is not due to different methods. The same, so we will unify the quantitative analysis, and the method of judging the analysis according to different methods is also different. In the comparison of image diffusion edge sharpness and double-pass filtering edge judgment, the main detection method is to judge the best sound velocity according to the edge sharpness of imaging, but before using the two methods, we will also image the pure image. To do the analysis and comparison of brightness, and to divide into the two methods of the brightest point analysis and the average brightness analysis. Because the result of the average brightness analysis method is different from the expected result, the brightest point analysis method is finally adopted for comparison. The comparison between the simulation and the experimental mid-term results is roughly the same, but in the non-focus area, the best sound velocity cannot be accurately determined, which is estimated as part of the discussion.