blocks|key|3564226|text|首先将颜色转换为Lab。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3564227|在色彩管理中，给出一个‘E’值，用来衡量给定的色彩变换在感知上的忠诚度。它只是在Lab空间中表示的原始颜色和最终颜色之间的向量差异的大小。|3564228|entityMap|0|LINK|mutability|MUTABLE|url|http://en.wikipedia.org/wiki/Lab_color_space^0|8|3|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]]|C|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]]]

first convert the colors to <a href="http://en.wikipedia.org/wiki/Lab_color_space" rel="nofollow noreferrer">Lab</a>. This colorspace is designed so that the vectorial difference between any two colors closely approximate a 'subjective distance'.

In color management, a 'delta E' value is given as a measure of how perceptually faithful a given color transformation is. it's just the magnitude of the vector difference between original and final colors as expressed in Lab space.

blocks|key|3564230|text|我的建议是完全跳过HSL/HSB，直接从RGB+to+LAB开始。完成此操作后，就可以进行标准的delta+E计算了。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3564231|entityMap|0|LINK|mutability|MUTABLE|url|http://www.easyrgb.com/index.php?X=MATH|1^0|K|A|0|1C|7|1|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@$A|N|B|O|1|P]|$A|Q|B|R|1|S]]|C|$]]|$1|D|3|-4|5|6|7|T|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]|L|$5|G|H|I|C|$J|K]]]]

My advice would be to skip HSL/HSB entirely, and go directly from <a href="http://www.easyrgb.com/index.php?X=MATH" rel="nofollow noreferrer">RGB to LAB</a>. Once you've done that, you can do a standard <a href="http://www.easyrgb.com/index.php?X=MATH" rel="nofollow noreferrer">delta E</a> computation.

blocks|key|2396338|text|我没有给你确切的数字，但我会使用比H或S高得多的L权重。眼睛不善于区分不同饱和度的相同颜色，几乎同样不善于区分不同的色调-特别是如果你试图看到的是细微的细节，比如文本。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2396339|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I don't have exact figures for you, but I'd use a much higher weight for L than H or S. The eye is bad at discriminating between equal colors of different saturation, and nearly as bad at distinguishing different hues - expecially if it's fine detail you're trying to see, like text.

blocks|key|3564245|text|我刚刚结束了an+interesting+study+into+color+spaces。正如其他人在这里提到的，将RGB转换为CIE-Lab并执行增量E计算将为您提供感知颜色距离。它会产生良好的结果。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3564246|我的目标是在有限的调色板中找到最接近的索引。然而，我发现使用CIE-Lab+Delta+E计算结果是“错误的”颜色。特别是灰度会得到太多的饱和度，从调色板中选择红色而不是灰色，但其他颜色也有问题(我不记得是哪种了)。不管是好是坏，我最终将色调的权重设置为1.2x，饱和度设置为1.5x，B值设置为1.0x或2.0x。这些结果或多或少都比单独使用增量E更好。|3564247|计算色调的距离有点麻烦，因为它是一个圆。例如，色调0和色调359的距离为1。解决方案是选择两个不同距离中的最小值。|3564248|以下是我基于上述内容编写的代码：|3564249|++++//+Finds+the+nearest+color+index+in+a+RGB+palette+that+matches+the+requested+color.
++++//+This+function+uses+HSB+instead+of+CIE-Lab+since+this+function+is+intended+to+be+called+after+GetReadableTextForegroundColors()+and+results+in+more+consistent+color+accuracy.
++++public+static+function+FindNearestPaletteColorIndex($palette,+$r,+$g,+$b)
++++{
++++++++$hsb1+=+self::ConvertRGBToHSB($r,+$g,+$b);

++++++++$result+=+false;
++++++++$founddist+=+false;
++++++++foreach+($palette+as+$key+=>+$rgb)
++++++++{
++++++++++++$rgb+=+array_values($rgb);
++++++++++++$r+=+$rgb[0];
++++++++++++$g+=+$rgb[1];
++++++++++++$b+=+$rgb[2];

++++++++++++$hsb2+=+self::ConvertRGBToHSB($r,+$g,+$b);

++++++++++++$hdiff+=+min(abs($hsb1["h"]+-+$hsb2["h"]),+abs($hsb1["h"]+-+$hsb2["h"]+%2B+($hsb1["h"]+<+$hsb2["h"]+?+-360.0+:+360.0)))+*+1.2;
++++++++++++$sdiff+=+($hsb1["s"]+-+$hsb2["s"])+*+1.5;
++++++++++++$bdiff+=+$hsb1["b"]+-+$hsb2["b"];
++++++++++++if+($hsb1["b"]+<+$hsb2["b"])++$bdiff+*=+2.0;

++++++++++++$hdiff+*=+$hdiff;
++++++++++++$sdiff+*=+$sdiff;
++++++++++++$bdiff+*=+$bdiff;

++++++++++++$dist+=+$hdiff+%2B+$sdiff+%2B+$bdiff;

++++++++++++if+($result+===+false+%7C%7C+$founddist+>=+$dist)
++++++++++++{
++++++++++++++++$result+=+$key;
++++++++++++++++$founddist+=+$dist;
++++++++++++}
++++++++}

++++++++return+$result;
++++}|code-block|syntax|javascript|3564250|来源：https://github.com/cubiclesoft/php-misc/blob/master/support/color_tools.php|3564251|将上面的代码转换为使用HSL而不是HSB/HSV应该不会太难。我更喜欢HSB颜色空间，因为它反映了Photoshop，它允许我在软件中确认我正在寻找的数字。|3564252|entityMap|0|LINK|mutability|MUTABLE|url|https://cubicspot.blogspot.com/2019/05/designing-better-terminal-text-color.html|1|https://github.com/cubiclesoft/php-misc/blob/master/support/color_tools.php^0|6|12|0|0|0|0|0|0|3|23|1|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@$A|13|B|14|1|15]]|C|$]]|$1|D|3|E|5|6|7|16|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|17|8|@]|9|@]|C|$]]|$1|H|3|I|5|6|7|18|8|@]|9|@]|C|$]]|$1|J|3|K|5|L|7|19|8|@]|9|@]|C|$M|N]]|$1|O|3|P|5|6|7|1A|8|@]|9|@$A|1B|B|1C|1|1D]]|C|$]]|$1|Q|3|R|5|6|7|1E|8|@]|9|@]|C|$]]|$1|S|3|-4|5|6|7|1F|8|@]|9|@]|C|$]]]|T|$U|$5|V|W|X|C|$Y|Z]]|10|$5|V|W|X|C|$Y|11]]]]

I just concluded <a href="https://cubicspot.blogspot.com/2019/05/designing-better-terminal-text-color.html" rel="nofollow noreferrer">an interesting study into color spaces</a>. As others mentioned here, converting RGB to CIE-Lab and doing a Delta E computation will give you perceptual color distance. It produces okay results.

My goal was to find the closest index in a limited color palette. However, I found using CIE-Lab Delta E calculations ended up with "wrong" colors. Particularly grayscale would wind up getting too much saturation and select a red instead of a gray from the palette but other colors had issues too (I don't remember which ones). For better or worse, I wound up weighting hues at a 1.2x multiplier, saturation at 1.5x, and B values at either 1.0x or 2.0x depending on the direction. The results more or less work out better than just Delta E alone.

Calculating the distance of Hue is a bit tricky since it is a circle. For example, Hue 0 and Hue 359 are a distance of 1. The solution is to select the minimum of two different distances.

Here's my code based on the above:

<pre><code> // Finds the nearest color index in a RGB palette that matches the requested color.
 // This function uses HSB instead of CIE-Lab since this function is intended to be called after GetReadableTextForegroundColors() and results in more consistent color accuracy.
 public static function FindNearestPaletteColorIndex($palette, $r, $g, $b)
 {
 $hsb1 = self::ConvertRGBToHSB($r, $g, $b);

 $result = false;
 $founddist = false;
 foreach ($palette as $key =&gt; $rgb)
 {
 $rgb = array_values($rgb);
 $r = $rgb[0];
 $g = $rgb[1];
 $b = $rgb[2];

 $hsb2 = self::ConvertRGBToHSB($r, $g, $b);

 $hdiff = min(abs($hsb1["h"] - $hsb2["h"]), abs($hsb1["h"] - $hsb2["h"] + ($hsb1["h"] &lt; $hsb2["h"] ? -360.0 : 360.0))) * 1.2;
 $sdiff = ($hsb1["s"] - $hsb2["s"]) * 1.5;
 $bdiff = $hsb1["b"] - $hsb2["b"];
 if ($hsb1["b"] &lt; $hsb2["b"]) $bdiff *= 2.0;

 $hdiff *= $hdiff;
 $sdiff *= $sdiff;
 $bdiff *= $bdiff;

 $dist = $hdiff + $sdiff + $bdiff;

 if ($result === false || $founddist &gt;= $dist)
 {
 $result = $key;
 $founddist = $dist;
 }
 }

 return $result;
 }
</code></pre>

Source: <a href="https://github.com/cubiclesoft/php-misc/blob/master/support/color_tools.php" rel="nofollow noreferrer">https://github.com/cubiclesoft/php-misc/blob/master/support/color_tools.php</a>

Converting the above to use HSL instead of HSB/HSV shouldn't be too difficult. I prefer the HSB color space since it mirrors Photoshop, which allows me to confirm the numbers I'm looking for in software.

I am coding a program that allows a user to choose various foreground and background colours in RGB. I want to not allow them to chose foreground and backgrounds that are too similar and decided to convert to HSL and use HSL euclidean distance as a way to check for similarity. 

Is there a good weighting to use for HSL space (rather than equal weighting for H, S and L)? I've looked at various sites and not found the exact thing I need; just things saying that HSL or HSB is better than RGB.

Distance measure between HSL colours

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

文章

问答

视频

教程

学习中心

腾讯云实验室

直播

竞赛

腾讯云代码分析专区

腾讯iOA零信任安全管理系统专区

腾讯云架构师技术同盟交流圈

腾讯云数据库专区

腾讯云智能顾问专区

腾讯云原生专区

腾讯混元专区

腾讯云TCE专区

腾讯云Lighthouse专区

腾讯云HAI专区

腾讯云Edgeone专区

腾讯云存储专区

腾讯云智能专区

腾讯轻联专区 

腾讯云开发专区

TAPD专区

腾讯轻量云游戏服专区

腾讯云最具价值专家

腾讯云架构师技术同盟

腾讯云创作之星

腾讯云开发者先锋

腾讯云AI代码助手

云原生构建

TAPD 敏捷项目管理

Cloud Studio

SDK中心

API中心

命令行工具

功能1上新10个字符

功能2描述100个字符功能2描述100个字符功能2描述100个字符功能2描述100个字符功能2描述100个字符功能2描述100个字符功能2描述100个字符功能2描述100个字符功能2描述100个字符。

功能2上新100个字符功能2上新100个字符功能2上新100个字符功能2上新100个字符功能2上新100个字符功能2上新100个字符功能2上新100个字符功能2上新100个字符功能2上新100个字符。

功能5描述100个字符功能5描述100个字符功能5描述100个字符功能5描述100个字符功能5描述100个字符功能5描述100个字符

功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符功能5上新100个字符

功能4上新

文章&问答评论现已支持表情

全新交互，全新视觉，新增快捷键、悬浮工具栏、高亮块等功能并同时优化现有功能，全面提升创作效率和体验

社区富文本编辑器全新改版！诚邀体验～ 

精选全网热门MCP server，让你的AI更好用 🚀

💥开发者 MCP广场重磅上线！

涵盖代码开发、场景应用、自动测试全流程，助你从零构建专属AI助手

一站式MCP教程库，解锁AI应用新玩法

聚焦“写作效率、视觉美观与运行性能”三方面进行全面升级，为您提供更高效、稳定的创作环境

社区富文本&Markdown编辑器全新改版上线，欢迎大家体验!

诚挚邀请您参与本次调研，分享您的真实使用感受与建议。您的反馈至关重要，感谢您的支持与参与！

社区新版编辑器体验调研

我正在编写一个程序，允许用户在RGB中选择各种前景和背景颜色。我不想让他们选择太相似的前景和背景，并决定转换为HSL，并使用HSL欧几里德距离作为检查相似性的一种方法。是否有一个好的权重用于HSL空间(而不是H，S和L的相同权重)？我看了很多网站，都没有找到我需要的东西；只是说HSL或HSB比RGB更好。

问HSL颜色之间的距离度量
EN

回答 4

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问HSL颜色之间的距离度量EN

回答 4

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问HSL颜色之间的距离度量
EN