JS的两个值之间的色差/相似性％

问题描述：

我需要计算两个十六进制颜色值之间的差异，因此输出是一个百分比值。我第一个分离的是将十六进制值转换为十进制，因为第一个将具有比最后一个更高的权重。

I need to compute the difference between two hex color values so the output is a percentage value. The first thing I discarted was converting the hex value into decimal, as the first one will have much higher weight than the last.

第二个选项是计算每个RGB值，然后将它们全部添加。然而， 0,0,0 和 30,30,30 之间的差异远远低于 0,0,0 和 90,0,0 。

The second option is to compute the difference between each of the RGB values and then add them all. However, the difference between 0, 0, 0 and 30, 30, 30 is much lower than the one between 0, 0, 0 and 90, 0, 0.

此问题建议使用 YUV ，但我不知道如何使用它来建立差异。

This question recommends using YUV, but I can't figure out how to use it to establish the difference.

此外，

Also, this other question has a nice formula to compute the difference and output a RGB value, but it's not quite there.

答

这个其他问题有一个很好的公式来计算差异和输出一个RGB值，

只需计算欧氏距离：

Just compute an Euclidean distance:

var c1 = [0, 0, 0],
    c2 = [30, 30, 30],
    c3 = [90, 0, 0],
    distance = function(v1, v2){
        var i,
            d = 0;

        for (i = 0; i < v1.length; i++) {
            d += (v1[i] - v2[i])*(v1[i] - v2[i]);
        }
        return Math.sqrt(d);
    };

console.log( distance(c1, c2), distance(c1, c3), distance(c2, c3) );
//will give you 51.96152422706632 90 73.48469228349535

JS的两个值之间的色差/相似性％

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