python中如何定义颜色_Python图像处理之颜色的定义与使用分析
本文實例講述了Python圖像處理之顏色的定義與使用。分享給大家供大家參考，具體如下：
python中的顏色相關的定義在matplotlib模塊中，為方便使用，這里給大家展示一下在這個模塊中都定義了哪些選顏色。
1、顏色名稱的導出
導出代碼如下：
import matplotlib
for name, hex in matplotlib.colors.cnames.iteritems():
print(name, hex)
導出結果如下：
names = {
'aliceblue':??????????? '#F0F8FF',
'antiquewhite':???????? '#FAEBD7',
'aqua':???????????????? '#00FFFF',
'aquamarine':?????????? '#7FFFD4',
'azure':??????????????? '#F0FFFF',
'beige':??????????????? '#F5F5DC',
'bisque':?????????????? '#FFE4C4',
'black':??????????????? '#000000',
'blanchedalmond':?????? '#FFEBCD',
'blue':???????????????? '#0000FF',
'blueviolet':?????????? '#8A2BE2',
'brown':??????????????? '#A52A2A',
'burlywood':??????????? '#DEB887',
'cadetblue':??????????? '#5F9EA0',
'chartreuse':?????????? '#7FFF00',
'chocolate':??????????? '#D2691E',
'coral':??????????????? '#FF7F50',
'cornflowerblue':?????? '#6495ED',
'cornsilk':???????????? '#FFF8DC',
'crimson':????????????? '#DC143C',
'cyan':???????????????? '#00FFFF',
'darkblue':???????????? '#00008B',
'darkcyan':???????????? '#008B8B',
'darkgoldenrod':??????? '#B8860B',
'darkgray':???????????? '#A9A9A9',
'darkgreen':??????????? '#006400',
'darkkhaki':??????????? '#BDB76B',
'darkmagenta':????????? '#8B008B',
'darkolivegreen':?????? '#556B2F',
'darkorange':?????????? '#FF8C00',
'darkorchid':?????????? '#9932CC',
'darkred':????????????? '#8B0000',
'darksalmon':?????????? '#E9967A',
'darkseagreen':???????? '#8FBC8F',
'darkslateblue':??????? '#483D8B',
'darkslategray':??????? '#2F4F4F',
'darkturquoise':??????? '#00CED1',
'darkviolet':?????????? '#9400D3',
'deeppink':???????????? '#FF1493',
'deepskyblue':????????? '#00BFFF',
'dimgray':????????????? '#696969',
'dodgerblue':?????????? '#1E90FF',
'firebrick':??????????? '#B22222',
'floralwhite':????????? '#FFFAF0',
'forestgreen':????????? '#228B22',
'fuchsia':????????????? '#FF00FF',
'gainsboro':??????????? '#DCDCDC',
'ghostwhite':?????????? '#F8F8FF',
'gold':???????????????? '#FFD700',
'goldenrod':??????????? '#DAA520',
'gray':???????????????? '#808080',
'green':??????????????? '#008000',
'greenyellow':????????? '#ADFF2F',
'honeydew':???????????? '#F0FFF0',
'hotpink':????????????? '#FF69B4',
'indianred':??????????? '#CD5C5C',
'indigo':?????????????? '#4B0082',
'ivory':??????????????? '#FFFFF0',
'khaki':??????????????? '#F0E68C',
'lavender':???????????? '#E6E6FA',
'lavenderblush':??????? '#FFF0F5',
'lawngreen':??????????? '#7CFC00',
'lemonchiffon':???????? '#FFFACD',
'lightblue':??????????? '#ADD8E6',
'lightcoral':?????????? '#F08080',
'lightcyan':??????????? '#E0FFFF',
'lightgoldenrodyellow': '#FAFAD2',
'lightgreen':?????????? '#90EE90',
'lightgray':??????????? '#D3D3D3',
'lightpink':??????????? '#FFB6C1',
'lightsalmon':????????? '#FFA07A',
'lightseagreen':??????? '#20B2AA',
'lightskyblue':???????? '#87CEFA',
'lightslategray':?????? '#778899',
'lightsteelblue':?????? '#B0C4DE',
'lightyellow':????????? '#FFFFE0',
'lime':???????????????? '#00FF00',
'limegreen':??????????? '#32CD32',
'linen':??????????????? '#FAF0E6',
'magenta':????????????? '#FF00FF',
'maroon':?????????????? '#800000',
'mediumaquamarine':???? '#66CDAA',
'mediumblue':?????????? '#0000CD',
'mediumorchid':???????? '#BA55D3',
'mediumpurple':???????? '#9370DB',
'mediumseagreen':?????? '#3CB371',
'mediumslateblue':????? '#7B68EE',
'mediumspringgreen':??? '#00FA9A',
'mediumturquoise':????? '#48D1CC',
'mediumvioletred':????? '#C71585',
'midnightblue':???????? '#191970',
'mintcream':??????????? '#F5FFFA',
'mistyrose':??????????? '#FFE4E1',
'moccasin':???????????? '#FFE4B5',
'navajowhite':????????? '#FFDEAD',
'navy':???????????????? '#000080',
'oldlace':????????????? '#FDF5E6',
'olive':??????????????? '#808000',
'olivedrab':??????????? '#6B8E23',
'orange':?????????????? '#FFA500',
'orangered':??????????? '#FF4500',
'orchid':?????????????? '#DA70D6',
'palegoldenrod':??????? '#EEE8AA',
'palegreen':??????????? '#98FB98',
'paleturquoise':??????? '#AFEEEE',
'palevioletred':??????? '#DB7093',
'papayawhip':?????????? '#FFEFD5',
'peachpuff':??????????? '#FFDAB9',
'peru':???????????????? '#CD853F',
'pink':???????????????? '#FFC0CB',
'plum':???????????????? '#DDA0DD',
'powderblue':?????????? '#B0E0E6',
'purple':?????????????? '#800080',
'red':????????????????? '#FF0000',
'rosybrown':??????????? '#BC8F8F',
'royalblue':??????????? '#4169E1',
'saddlebrown':????????? '#8B4513',
'salmon':?????????????? '#FA8072',
'sandybrown':?????????? '#FAA460',
'seagreen':???????????? '#2E8B57',
'seashell':???????????? '#FFF5EE',
'sienna':?????????????? '#A0522D',
'silver':?????????????? '#C0C0C0',
'skyblue':????????????? '#87CEEB',
'slateblue':??????????? '#6A5ACD',
'slategray':??????????? '#708090',
'snow':???????????????? '#FFFAFA',
'springgreen':????????? '#00FF7F',
'steelblue':??????????? '#4682B4',
'tan':????????????????? '#D2B48C',
'teal':???????????????? '#008080',
'thistle':????????????? '#D8BFD8',
'tomato':?????????????? '#FF6347',
'turquoise':??????????? '#40E0D0',
'violet':?????????????? '#EE82EE',
'wheat':??????????????? '#F5DEB3',
'white':??????????????? '#FFFFFF',
'whitesmoke':?????????? '#F5F5F5',
'yellow':?????????????? '#FFFF00',
'yellowgreen':????????? '#9ACD32'}
2、顏色圖示
通過如下代碼。可將上述顏色給逐個顯示出來，代碼如下：
import matplotlib.pyplot as plt
import matplotlib.patches as patches
import matplotlib.colors as colors
import math
fig = plt.figure()
ax = fig.add_subplot(111)
ratio = 1.0 / 3.0
count = math.ceil(math.sqrt(len(colors.cnames)))
x_count = count * ratio
y_count = count / ratio
x = 0
y = 0
w = 1 / x_count
h = 1 / y_count
for c in colors.cnames:
pos = (x / x_count, y / y_count)
ax.add_patch(patches.Rectangle(pos, w, h, color=c))
ax.annotate(c, xy=pos)
if y >= y_count-1:
x += 1
y = 0
else:
y += 1
plt.show()
顯示結果如下：
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本文標題: Python圖像處理之顏色的定義與使用分析
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