车牌识别 - 确定颜色范围以进行像素比较
经过有关车牌检测的大量工作后，我决定简单地在图像中查找黄色像素的“模式”将是在图像中查找车牌位置的充分方法。目前，我使用各种图形过滤器并检测白色像素图案，但是事实证明这越来越有问题。
现在回答这个问题，我知道“黄色”车牌是基于许多因素，例如亮度、环境。 
对此的洞察我需要一个范围来比较，例如：
if(FindIfYellow(GetPixel(x, y) ）））
但是我不知道是否使用 RGB 值，特别是单个 RGB 值来确定颜色是否为黄色。最后是否有一个网站或某种信息来定义这些范围？我知道
R：255 重力：255 B：0
是最纯的黄色，但就范围而言我不知道。不管怎样，希望这是一个合理的想法，我发帖的原因是为了确保我没有忽视某些事情，就像我经常做的那样:)。
Well after much work regarding vehicle plate detection, I've decided that simply finding a 'pattern' of yellow pixels within an image would be a sufficient method of finding the location of a license plate within an image. Currently I use various graphic filters and detect white pixel patterns, however this is proving to be more and more problematic.
Now for the question, I'm aware that the 'yellow' are a license plate is based on numerous factors such as brightness, environment.
Insight of this I would need a range to compare to, for example:
if(FindIfYellow(GetPixel(x, y)))
However I don't know if to use RGB values, specifically individual RGB values to determine if the color is a shade of yellow. Finally is there a website or information of some sort defining these ranges? I know
R: 255
G: 255
B: 0
Is the purest of yellow, but in terms of range I have no idea. Anyway hopefully it's a resonable idea, and the reason I post is to ensure I haven't overlook something, as I have been doing frequently :).
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查看 OpenALPR (http://www.openalpr.com)。它采用不同的方法进行板定位——它使用经过训练的 LBP 模式。除了基于颜色的检测之外，您可能还想使用此库以获得更高的准确性。例如，OpenALPR 可以检测潜在的车牌区域，然后简单地验证一定比例的区域是否呈黄色。
Check out OpenALPR (http://www.openalpr.com). It takes a different approach for plate localization -- it uses trained LBP patterns. You may want to use this library in addition to your color-based detection for even greater accuracy. For example, OpenALPR can detect potential plate regions, and then simply verify that a certain percentage of the area is yellow-ish.
使用 CMYK 通道分离 - 让我们对印版进行 OCR！
对其他图像重复该过程
Using CMYK channel separation - Let's OCR the Plate!
Repeating the process with the other image
金子是黄色的吗？黄橙黄色是黄橙黄色吗？黄绿色怎么样？
（我的观点是，这对于人类来说是一个模糊的定义，更不用说对于计算机而言......只需确定一个对您来说看起来黄色的范围并坚持下去即可。）
Is gold yellow? Is yellowish-orange yellow? How about yellow-green?
(My point being that this is a fuzzy definition for a human, let alone for a computer... just decide on a range that looks yellow to you and stick with it.)