比较c#中的RGB颜色 [英] Compare RGB colors in c#
问题描述
我试图找到一种方法来比较两种颜色，以找出它们的相似程度.我似乎找不到有关该主题的任何资源，所以我希望能在这里得到一些指点.
I'm trying to find a way to compare two colors to find out how much they are alike. I can't seem to find any resources about the subject so I'm hoping to get some pointers here.
理想情况下，我想得到一个分数，表明他们有多相似.例如，0 到 100，其中 100 是相等的，0 是完全不同的.
Idealy, I would like to get a score that tells how much they are alike. For example, 0 to 100, where 100 would be equal and 0 would be totally different.
谢谢！
从答案中更多地了解颜色我明白我的问题有点含糊.我会尽量解释我需要这个的目的.
Getting to know a bit more about colors from the answers I understand my question was a bit vague. I will try to explain what I needed this for.
我有一个 800x600 大小的应用程序窗口的像素数据(位置和颜色)，因此我可以通过检查每个 x 间隔来确定某个窗口是否打开.
I have pixeldata (location and color) of an application window at 800x600 size so I can find out if a certain window is open or not by checking every x-interval.
但是，一旦应用程序调整大小(内容被缩放，而不是移动)，此方法就会失败.我可以计算像素移动的位置，但由于四舍五入和抗锯齿，颜色可能会略有不同.
However, this method fails as soon as the application is resized (the contents are scaled, not moved). I can calculate where the pixels move, but because of rounding and antialising the color can be slightly different.
在这种情况下，Pieter 的解决方案对我来说已经足够好了，尽管所有其他回复也非常有帮助，所以我只是为每个人点赞.从专业的角度来看，我确实认为ColorEye的答案是最准确的，所以我将其标记为答案.
Pieter's solution was good enough for me in this case, although all other responses were extremely helpfull as well, so I just upvoted everyone. I do think that ColorEye's answer is the most accurate when looking at this from a professional way, so I marked it as the answer.
推荐答案
您要查找的内容称为 Delta-E.
What you are looking for is called Delta-E.
http://www.colorwiki.com/wiki/Delta_E:_The_Color_Difference
它是LAB色彩空间中两种颜色之间的距离.据说人眼无法分辨1 DeltaE以下的颜色(我发现我的眼睛能分辨出1 DeltaE以下的颜色差异，每个人都不一样.)
It is the distance between two colors in LAB color space. It is said that the human eye cannot distinguish colors below 1 DeltaE (I find that my eyes can find differences in colors below 1 DeltaE, each person is different.)
'色差'有4个公式.
- Delta E (CIE 1976)
- Delta E (CIE 1994)
- Delta E (CIE 2000)
- Delta E (CMC)
检查此站点上的数学链接:
Check the math link on this site:
所以正确的答案是使用给定的公式将 RGB 转换为 LAB，然后使用 DeltaE 1976 来确定颜色的差异".结果为 0 表示颜色相同.任何大于 0 的值都可以通过大多数人无法区分 1 或更小的 delta e"规则来判断.
So the proper answer is to convert your RGB to LAB using the formula given, then use DeltaE 1976 to determine the 'difference' in your colors. A result of 0 would indicate identical colors. Any value higher than 0 could be judged by the rule 'A delta e of 1 or less is indistinguishable by most people'.
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