在for循环中生成的数字如何输出它们，就像它们的最高值是1和最低0一样？

So I have a black and white image in OpenCV, currently I output each of its per pixel color values into file so I get a file of values from 1 to 255. I have lots of really small images so in one image I usually get values that have small difference. like from 25 to 100.. So I need a way to print into file not color values but values from 0 to 1 where lowest color would be 0 and highest 1...

所以我在OpenCV中有一个黑白图像，目前我将每个像素颜色值输出到文件中，所以我得到一个从1到255的值的文件。我有很多非常小的图像所以在一个图像中我通常得到值差别很小。喜欢从25到100 ..所以我需要一种方法来打印到文件而不是颜色值，但值从0到1，其中最低颜色将是0和最高1 ...

for(x=0;x<w;x++){
     for(y=0;y<h;y++){
          double RealColor = cvGetReal2D(source, y, x);
          file << RealColor << " ";
     }
     file << endl;
}file << endl;

How to do such a thing?

怎么做这样的事情？

2 个解决方案

#1

Just do a first pass, and find minimum and maximum values. Then do a second pass, and modify each value as (v - min) / (max - min) before writing to file.

只做第一遍，找到最小值和最大值。然后执行第二遍，并在写入文件之前将每个值修改为（v - min）/（max - min）。

2 个解决方案

#1

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