python - OpenCV Python 计算历史

Question

我想用 Python 的 OpenCV 的 calcHist 函数计算图像直方图。
但它不起作用。

代码:

im = cv2.imread(imPath,0)
hist = cv2.calcHist([im],[0],None,[256],[0,256])

我得到这样的错误:

OpenCV Error: Assertion failed (step(dims[-1] == (size_t) CV_ELEM_SIZE(flags)) 
in create, file opencv/sources/modules/core/src/matrix.cpp line:236

Answer 1

试试这个:

import cv2
im = cv2.imread(r'd:\temp\1.bmp',0)
hist = cv2.calcHist([im],[0],None,256,[0,255])

print im
print hist