这个for循环让我发疯了！！！需要一些建议 [英] This for loop is making me crazy!!! Need some suggestions please

问题描述

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解决方案

这是最好的开始与原始图像数据，因为否则数据将迷失在过程.当您单击按钮时，现在的结果将是每次相同.否则，将在已经标准化的图像上进行标准化，并且最终该图像将根本不正常.就像您要使所有值稍微接近平均值一样.如果一遍又一遍地重复该过程，最终所有值将只是平均值.

祝您好运！

也许我在计算中犯了一个错误，无论如何，您的翻译信息可能会被写成

d'' _r，b = d _r，b -S _r (d _r，b )/S _r + S _rb (d _r，b )/S _rb

其中

• S _r 是索引r上的总和
• S _rb 是索引r，b上的总和.

该公式可能被重写为

d'' _r，b = d _r，b -F(b)+ G

如果再次应用转换，则将获得(经过一些计算)

d" _r，b = d _r，b -2 F(b)+ 2 G

等等.


顺便说一句，在已发布的代码中存在一些编程错误(例如，您忘记释放一些已分配的内存，而将C++的delete用于分配有C的malloc的内存).

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解决方案

It is best to start with the original image data because otherwise data would get lost in the process. When you click the button the result now would be the same every time. Otherwise the normalization would be done on an already normalized image and eventually the image won''t be normal at all. It''s like when you would bring all the values somewhat closer the average. If you repeat that process over and over, eventually all the values will just be the average.

Good luck!

Maybe I made a mistake in my computations, anyway, your trasnformation migh be written

d''_r,b = d_r,b - S_r(d_r,b)/S_r + S_rb(d_r,b)/S_rb

where

• S_r is sum on index r
• S_rb is sum on indices r,b.

The formula maybe re-written as

d''_r,b = d_r,b - F(b) + G

If you apply again the transformation, then you obtain (after some calculations)

d"_r,b = d_r,b - 2 F(b) + 2 G

and so on.


BTW there are some programming mistakes in the posted code (for instance, you forgot to free some allocated memory and you used C++''s delete for memory allocated with C''s malloc).

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