我在
Python中有以下测试代码来读取,阈值和显示图像：
import cv2
import numpy as np
from matplotlib import pyplot as plt
# read image
img = cv2.imread('slice-309.png',0)
ret,thresh = cv2.threshold(img,230,cv2.THRESH_BINARY)
height,width = img.shape
print "height and width : ",height,width
size = img.size
print "size of the image in number of pixels",size
# plot the binary image
imgplot = plt.imshow(img,'gray')
plt.show()
我想用一定的标签来计算图像中的像素数,例如黑色.
我怎样才能做到这一点 ？我查看了OpenCV的教程,但没有找到任何帮助:-(
谢谢！