python 如何使用 PIL 减少调色板
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How to reduce color palette with PIL
提问by Nadia Alramli
I'm not sure how I would go about reducing the color palette of a PIL Image. I would like to reduce an image's palette to the 5 prominent colors found in that image. My overall goal is to do some basic color sampling.
我不确定如何减少 PIL 图像的调色板。我想将图像的调色板减少到该图像中的 5 种突出颜色。我的总体目标是做一些基本的颜色采样。
回答by Nadia Alramli
That's easy, just use the undocumented colors argument:
这很简单，只需使用未记录的颜色参数：
result = image.convert('P', palette=Image.ADAPTIVE, colors=5)
I'm using Image.ADAPTIVE to avoid dithering
我正在使用 Image.ADAPTIVE 来避免抖动
回答by Paul
I assume you want to do something more sophisticated than posterize. "Sampling" as you say, will take some finesse, as the 5 most common colors in the image are likely to be similar to one another. Maybe take a look at the 5 most separated peaks in a histogram.
我假设您想做一些比posterize更复杂的事情。正如您所说的“采样”需要一些技巧，因为图像中最常见的 5 种颜色可能彼此相似。也许看看直方图中5 个最分离的峰值。
回答by tzot
The short answer is to use the Image.quantizemethod. For more info, see: How do I convert any image to a 4-color paletted image using the Python Imaging Library ?
简短的回答是使用该Image.quantize方法。有关详细信息，请参阅：如何使用 Python 成像库将任何图像转换为 4 色调色板图像？
