IndexError：元组索引超出范围-计算平均值RGB

Question

我正在尝试使用python计算图像的平均RGB值。我在这里找到了使用numpy的可接受方法。

How to find the average colour of an image in Python with OpenCV?

我可以使用以上答案中的示例图像来计算RGB平均值，但是无法计算我的图像（波纹管）的RGB平均值。

import os
import cv2
import numpy as np


path = ('C:/images')

img = cv2.imread(path + '/1049.jpg', 0)
img = np.array(img)
average = img.mean(axis=0).mean(axis =0)
print(average)

我收到以下错误。

    Traceback (most recent call last):
  File "c:/Users/isaac_madsen/Google Drive/Rhizoc_2018/image_stats.py", line 21, in <module>
    average = img.mean(axis=0).mean(axis =0)
  File "C:\Users\isaac_madsen\AppData\Local\Continuum\anaconda3\lib\site-packages\numpy\core\_methods.py", line 57, in _mean
    rcount = _count_reduce_items(arr, axis)
  File "C:\Users\isaac_madsen\AppData\Local\Continuum\anaconda3\lib\site-packages\numpy\core\_methods.py", line 50, in _count_reduce_items
    items *= arr.shape[ax]
IndexError: tuple index out of range

我在非对称数组上找到了类似问题的答案，但是我不确定如何在我的特殊情况下实现解决方案，或者不确定我是否实际上在处理非对称数组。

Means of asymmetric arrays in numpy

Answer 1

您可能要确保文件位于您要查找的位置。要验证，

BASE_PATH = 'C:/images'
FILE_PATH = os.path.join(BASE_PATH, '1049.jpg')

try:
    fh = open(FILE_PATH, 'r')
    img = cv2.imread(FILE_PATH, 0)
    img = np.array(img)
    average = img.mean(axis=0).mean(axis =0)
    print(average)

except FileNotFoundError:
    print(f"No file here: {FILE_PATH}")