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[第四次作业-问题2]用9个掩模计算每个像素值的时候，有什么不用循环就可以快速实现的技巧吗 #64

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Precola opened this issue Nov 4, 2019 · 2 comments
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[第四次作业-问题2]用9个掩模计算每个像素值的时候，有什么不用循环就可以快速实现的技巧吗 #64

Precola opened this issue Nov 4, 2019 · 2 comments
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@douhaoexia @chendianhao @ShaelynW @zhuzhu18
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@Precola
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Precola commented Nov 4, 2019

问题描述

实际中，在MATLAB下，我用for循环，计算每个像素值，这种方法，代码执行时间有点长。

相关文件

使用GIST来上传相关的长文件，然后链接到此处。
@Precola Precola added the 作业4 label Nov 4, 2019
@antenna-before
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老师说写成卷积，可是我在Python下，卷积比提取像素点还慢很多？

@renwuli
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renwuli commented Nov 5, 2019

nlfilter+dot product+do not use matlab built-in std and mean

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@douhaoexia douhaoexia

@chendianhao chendianhao

@ShaelynW ShaelynW

@zhuzhu18 zhuzhu18

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@douhaoexia @antenna-before @chendianhao @ShaelynW @zhuzhu18 @Precola @renwuli