访问和删除负像素 [英] Access and remove negative pixels

问题描述

我应该如何解决从MRI切片(或任何图像)中去除负像素的问题?

How should I approach the problem of removing negative pixels from MRI slices (or any image)?

此外，如果有人可以简要解释它们发生的原因，那将真的有帮助.

Also, it would really help if someone can briefly explain why they occur.

我已经阅读了许多在线参考资料，尤其是在MATLAB论坛上，但是它们似乎有多种原因.

I have read many online references especially those on MATLAB forum, but they seem to have diverse reasons as to why they occur.

对不起，我还没有代码要发布，因为我还在弄清楚自己的方法.

Sorry, I don't have a code to post, since I am figuring out my approach yet.

推荐答案

限制值的另一种方法是使用S型函数

Another way to limit your values is to use a sigmoid function

https://en.wikipedia.org/wiki/Sigmoid_function

它可以缩放，以便所有答案的范围从0到255它可用于限制原始数据余额中的峰值.它通常用于神经网络.

It can be scaled so that all answers range from 0 to 255 And it can be used to limit the spikes in raw data balance. Its often used in neural networks.

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