The general theories of gray correction methods for the medical ultrasonic image are introduced in this paper, including gray level correction, gray level transformation and histogram correction.
介绍了超声医学图像灰度校正常用方法的基本原理，这些方法主要有灰度级校正、灰度变换及直方图修正。
Image distortion correction includes spatial correction and gray-level correction.
图像畸变校正包括空间位置校正和灰度校正。
Image distortion correction includes spatial correction and gray-level correction.
图像畸变校正包括空间位置校正和灰度校正。
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