It brings inconvenience to the later processing for the introduced noises while in the acquirement of CCD image, thus image denoise is necessary.
CCD图像在其获取过程中由于噪声引入而给别的处理带来不便，因而对其进行降噪处理是一项至关重要的工作。
Objective:To study the denoise of medical digital image and increasing doctors diagnostic ability of images detail.
前言： 目的研究医学数字影像的降噪法，提高临床大夫对医学影像细节的诊断能力。
Result: Good result about edge detection and denoise for image was gained by this way.
结果此方法得到了满意的边缘检测和降噪结果，克服了传统方法的缺点。
The denoise image has little error compare to original image and the effect of denoising is distinct.
去噪图像相对于原图像误差小，去噪效果明显。
It is our aim to denoise and preserve the details such as edges and corners in the image as much as possible.
我们的主要目标是在去除图像噪声的同时尽可能地保持图像的边缘以及图像角点等特征信息。
Through analyzing the image gradient, this model used second order model to denoise at the region with obvious gradient change and the region with tiny gradient change.
该模型通过对图像梯度的分析，在梯度变化剧烈区域和梯度变化微小区域利用二阶模型去噪以提高去噪效率；
Through analyzing the image gradient, this model used second order model to denoise at the region with obvious gradient change and the region with tiny gradient change.
该模型通过对图像梯度的分析，在梯度变化剧烈区域和梯度变化微小区域利用二阶模型去噪以提高去噪效率；
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