从float64到uint8的有损转换>> [

Question

来自

https://www.makeartwithpython.com/blog/visualizing-sort-algorithms-in-python/

的代码>

from imageio import imsave

import numpy as np

newImage = np.random.randint(0, 255, (300, 300, 3))

in_hsv_h = color.convert_colorspace(newImage, 'RGB', 'HSV')
in_hsv_s = in_hsv_h.copy()
in_hsv_v = in_hsv_h.copy()

for i in range(newImage.shape[0]):
    in_hsv_h[i,:,0] = np.sort(in_hsv_h[i,:,0])
    in_hsv_s[i,:,1] = np.sort(in_hsv_s[i,:,1])
    in_hsv_v[i,:,2] = np.sort(in_hsv_v[i,:,2])

imsave('testing-sorted-hue.png', color.convert_colorspace(in_hsv_h, 'HSV', 'RGB'))
imsave('testing-sorted-saturation.png', color.convert_colorspace(in_hsv_s, 'HSV', 'RGB'))

Lossy conversion from float64 to uint8. Range [0, 1]. Convert image to uint8 prior to saving to suppress this warning.
仍然非常缺乏经验，有没有解决此问题的快速方法？

来自https://www.makeartwithpython.com/blog/visualizing-sort-algorithms-in-python/的代码from imageio import imsave import numpy as np newImage = np.random.randint（0，255，（300，300 ，3））in_hsv_h = ...

Answer 1

警告是不言自明的：color.convert_colorspace(in_hsv_h, 'HSV', 'RGB')的类型为float64，imsave将元素转换为uint8。

PNG图像的像素，每个分量存储为一个字节（红色表示一个字节，绿色表示一个字节，蓝色表示一个字节）。每个分量都是[0，255]范围内的整数值（类型uint8）。