使用Python OpenCV测量微小颗粒的费雷特直径

如何解决使用Python OpenCV测量微小颗粒的费雷特直径

我正在尝试使用Python OpenCV2测量沉积在玻璃上的微小颗粒的费雷特直径。目前，我有近150张图像需要自动执行此过程。为了进行测量，我编写了以下Python脚本：

import cv2
import numpy as np
import matplotlib.pyplot as plt
from skimage import io,color,measure

##step-1 reading the image
img = cv2.imread('1.tif',0)
pixel_2_micron = 1.75 #1 pixel is equal too 1.75 microns
#img = color.rgb2gray(io.imread('1.tif',0))

##step-2 selecting required region if necessary
cropped_img = img[0:1422,:]
#plt.hist(img.flat,bins=100,range=(0,255))
ret,thresh = cv2.threshold(cropped_img,162,217,cv2.THRESH_BINARY)

#Step-3
kernel = np.ones((3,3),np.uint8)
eroded = cv2.erode(thresh,kernel,iterations = 1)
dilated = cv2.dilate(eroded,iterations = 1)
#cv2.imshow("Original Image",img)
#cv2.imshow("Threshold Image",thresh)
#cv2.imshow("Eroded Image",eroded)
#cv2.imshow("Dilated Image",dilated)
#cv2.waitKey(0)

#step-4

mask = thresh == 217
io.imshow(mask) #show the masked image 

请协助我测量遮罩区域的尺寸。尤其是所有遮盖区域的费雷直径。

我已经附上了遮盖了颗粒的图像。