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markdown formula can not display righly in github_readme #7

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snowflowersnowflake Oct 28, 2019
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4 changes: 2 additions & 2 deletions 番外篇07. 亮度与对比度/README.md
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亮度调整是将图像像素的强度整体变大/变小，对比度调整指的是图像暗处的像素强度变低，亮出的变高，从而拓宽某个区域内的显示精度。

OpenCV中亮度和对比度应用这个公式来计算：$ g(x)=\alpha f(x)+\beta $，其中：α(>0)、β常称为增益与偏置值，分别控制图片的对比度和亮度。
OpenCV中亮度和对比度应用这个公式来计算：<span class="mrow" id="MathJax-Span-2"><span class="mi" id="MathJax-Span-3" style="font-family: MathJax_Math-italic;">g<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.003em;"></span></span><span class="mo" id="MathJax-Span-4" style="font-family: MathJax_Main;">(</span><span class="mi" id="MathJax-Span-5" style="font-family: MathJax_Math-italic;">x</span><span class="mo" id="MathJax-Span-6" style="font-family: MathJax_Main;">)</span><span class="mo" id="MathJax-Span-7" style="font-family: MathJax_Main; padding-left: 0.281em;">=</span><span class="mi" id="MathJax-Span-8" style="font-family: MathJax_Math-italic; padding-left: 0.281em;">α</span><span class="mi" id="MathJax-Span-9" style="font-family: MathJax_Math-italic;">f<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.058em;"></span></span><span class="mo" id="MathJax-Span-10" style="font-family: MathJax_Main;">(</span><span class="mi" id="MathJax-Span-11" style="font-family: MathJax_Math-italic;">x</span><span class="mo" id="MathJax-Span-12" style="font-family: MathJax_Main;">)</span><span class="mo" id="MathJax-Span-13" style="font-family: MathJax_Main; padding-left: 0.225em;">+</span><span class="mi" id="MathJax-Span-14" style="font-family: MathJax_Math-italic; padding-left: 0.225em;">β<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.003em;"></span></span></span>，其中：α(>0)、β常称为增益与偏置值，分别控制图片的对比度和亮度。

> 经验之谈：此处对α/β控制对比度和亮度有争议，具体请参考：[OpenCV关于对比度和亮度的误解](http://blog.csdn.net/abc20002929/article/details/40474807)。

Expand Down Expand Up @@ -43,4 +43,4 @@ cv2.waitKey(0)
- [numpy.clip()](https://docs.scipy.org/doc/numpy/reference/generated/numpy.clip.html#numpy.clip)
- [OpenCV关于对比度和亮度的误解](http://blog.csdn.net/abc20002929/article/details/40474807)
- [OpenCV改变图像亮度和对比度以及优化](http://blog.csdn.net/u013139259/article/details/52145377)
- [Mat::convertTo](https://docs.opencv.org/3.1.0/d3/d63/classcv_1_1Mat.html#a3f356665bb0ca452e7d7723ccac9a810)
- [Mat::convertTo](https://docs.opencv.org/3.1.0/d3/d63/classcv_1_1Mat.html#a3f356665bb0ca452e7d7723ccac9a810)