数据类型错误 [英] Data type error

问题描述

运行此代码时，我得到输出:

When I run this code I get the output:

TypeError: an integer is required

我不知道为什么会这样，因为我将这两种数据类型分别设置为uint8和uint64.显然我不太了解数据类型.

I have no idea why this is happening because I set both of the data types to uint8 and uint64 respectively. Evidently I don't understand data types very well.

from PIL import Image

from numpy import random

N = 100

##open an image
im=Image.open('/Users/grahamwarner/Desktop/Experiment/gwarner/labeled_photos/masks/003030.png')

##create a random image
rand_matrix = random.randint(0, 255, (500, 500, 3)).astype('uint8')

rand_image = Image.fromarray(rand_matrix)

##select N random pixels
rand_pix = random.randint(0,499, (N,2)).astype('uint64')

##replace the random values at these pixels with the original values
for ii in range(N):

  rand_image.putpixel(tuple(rand_pix[ii,:]), im.getpixel(tuple(rand_pix[ii,:])))

推荐答案

PIL中的getpixel方法似乎对其输入非常挑剔，并且特别希望int s的元组(与Numpy的uint64类型).以下对我有用:

The getpixel method in PIL seems to be very picky about its input, and specifically wants a tuple of ints (which are not the same as Numpy's uint64 type). The following works for me:

for ii in range(N):
    coordinate = tuple(map(int, rand_pix[ii,:]))
    rand_image.putpixel(coordinate, im.getpixel(coordinate))

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