我假设您正在尝试使用该Image模块。这是一个例子：
from PIL import Image
picture = Image.open("/path/to/my/picture.jpg")
r,g,b = picture.getpixel( (0,0) )
print("Red: {0}, Green: {1}, Blue: {2}".format(r,g,b))
在此图像上运行此命令，得到输出：
>>> from PIL import Image
>>> picture = Image.open("/home/gizmo/Downloads/image_launch_a5.jpg")
>>> r,g,b = picture.getpixel( (0,0) )
>>> print("Red: {0}, Green: {1}, Blue: {2}".format(r,g,b))
Red: 138, Green: 161, Blue: 175
编辑：做你想要的我会尝试这样的事情
from PIL import Image
picture = Image.open("/path/to/my/picture.jpg")
# Get the size of the image
width, height = picture.size()
# Process every pixel
for x in width:
for y in height:
current_color = picture.getpixel( (x,y) )
####################################################################
# Do your logic here and create a new (R,G,B) tuple called new_color
####################################################################
picture.putpixel( (x,y), new_color)
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