Update README

Author: timerring

README.md

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 # digital-image-processing-matlab
 Matlab function basics and introductory tutorials for digital image processing.
+
+### Content
+
+| Title                                                        | Content                                                      |
+| ------------------------------------------------------------ | ------------------------------------------------------------ |
+| [MATLAB的图像显示方法](https://github.com/timerring/digital-image-processing-matlab/blob/main/01_image_display_method_of_matlab.md) | [各种基础序列](https://github.com/timerring/digital-image-processing-matlab/blob/main/01_image_display_method_of_matlab.md#1单位冲击响应序列)  \|  [图像的读](https://github.com/timerring/digital-image-processing-matlab/blob/main/01_image_display_method_of_matlab.md#1图像的读)  \|  [图像显示](https://github.com/timerring/digital-image-processing-matlab/blob/main/01_image_display_method_of_matlab.md#1图像显示)  \|  [同屏显示多个图像](https://github.com/timerring/digital-image-processing-matlab/blob/main/01_image_display_method_of_matlab.md#2同屏显示多个图像)  \|  [数字图像处理中常用到的MATLAB函数](https://github.com/timerring/digital-image-processing-matlab/blob/main/01_image_display_method_of_matlab.md#3数字图像处理中常用到的matlab函数) |
+| [灰度直方图及直方图均衡化](https://github.com/timerring/digital-image-processing-matlab/blob/main/02_gray_histogram_and_histogram_equalization.md) | [直方图的显示](https://github.com/timerring/digital-image-processing-matlab/blob/main/02_gray_histogram_and_histogram_equalization.md#1直方图的显示)  \|  [计算并绘制图像直方图](https://github.com/timerring/digital-image-processing-matlab/blob/main/02_gray_histogram_and_histogram_equalization.md#2计算并绘制图像直方图)  \|  [直方图均衡化](https://github.com/timerring/digital-image-processing-matlab/blob/main/02_gray_histogram_and_histogram_equalization.md#3直方图均衡化) |
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+
+### 参考书籍
+
++ [1] [Rafael C. Gonzalez, Richard E. Woods, and Steven L. Eddins. 2003. Digital Image Processing Using MATLAB. Prentice-Hall, Inc., USA.](https://github.com/timerring/digital-image-processing-matlab/blob/main/reference/Digital_Image_Processing_Using_Matlab.pdf)
++ [2] [阮秋琦.  数字图像处理（MATLAB版）[M]. 北京：电子工业出版社,  2014.](https://github.com/timerring/digital-image-processing-matlab/blob/main/reference/Digital_Image_Processing_(MATLAB_version).pdf)
++ [3] [冈萨雷斯.  数字图像处理（第三版）[M]. 北京：电子工业出版社,  2011.](https://github.com/timerring/digital-image-processing-matlab/blob/main/reference/Digital_Image_Processing_(Third_Edition).pdf)
+
+
+
+### ChangeLog
+
+- v1.0基础结构 230302
+
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+
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+
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+
+
+## LICENSE
+
+<a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/4.0/"><img alt="知识共享许可协议" style="border-width:0" src="https://img.shields.io/badge/license-CC BY--NC--SA 4.0-lightgrey" /></a><br />本作品采用<a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/4.0/">知识共享署名-非商业性使用-相同方式共享 4.0 国际许可协议</a>进行许可。