您可以使用Image 方法getdata(band=None) 或getpixel(xy)。
In [1]: from PIL import Image
In [2]: im = Image.open('block.png', 'r')
In [3]: data = list(im.getdata())
In [4]: data[:20]
Out[4]:
[(0, 0, 0),
(0, 0, 0),
(0, 0, 0),
(0, 0, 0),
(0, 0, 0),
(0, 0, 0),
(0, 0, 0),
(0, 0, 0),
(0, 0, 0),
(0, 0, 0),
(0, 0, 0),
(144, 33, 33),
(144, 33, 33),
(144, 33, 33),
(144, 33, 33),
(255, 255, 255),
(255, 255, 255),
(255, 255, 255),
(255, 255, 255),
(0, 0, 0)]
In [5]: pxl = im.getpixel((1, 1))
In [6]: pxl
Out[6]: (144, 33, 33)
要将getdata() 返回的序列转换为列表列表,可以使用列表推导:
In [61]: data2d = [data[i:i+im.width] for i in range(0, len(data), im.width)]
In [62]: data2d[0] # row 0
Out[62]:
[(0, 0, 0),
(0, 0, 0),
(0, 0, 0),
(0, 0, 0),
(0, 0, 0),
(0, 0, 0),
(0, 0, 0),
(0, 0, 0),
(0, 0, 0),
(0, 0, 0)]
In [63]: data2d[1] # row 1
Out[63]:
[(0, 0, 0),
(144, 33, 33),
(144, 33, 33),
(144, 33, 33),
(144, 33, 33),
(255, 255, 255),
(255, 255, 255),
(255, 255, 255),
(255, 255, 255),
(0, 0, 0)]
In [64]: data2d[1][1]
Out[64]: (144, 33, 33)