怎样去除图片中手部周围的黑点

Question

使用 opencv 在 python 中捕获图像

我想制作这张图片：

代码：

# Image Processing
gray = cv2.cvtColor(roi, cv2.COLOR_BGR2GRAY)
blur = cv2.GaussianBlur(gray, (51,51), 15) 
th3 = cv2.adaptiveThreshold(gray, 255, cv2.ADAPTIVE_THRESH_GAUSSIAN_C, cv2.THRESH_BINARY_INV, 11, 2)
ret, test_image = cv2.threshold(th3, 10, 255, cv2.THRESH_BINARY_INV+cv2.THRESH_OTSU)

有点像这样：

Answer 1

我认为你应该尝试关闭操作。 它会完成这项工作。

gray = cv2.cvtColor(roi, cv2.COLOR_BGR2GRAY)
blur = cv2.GaussianBlur(gray, (51,51), 15) 
th3 = cv2.adaptiveThreshold(gray, 255, cv2.ADAPTIVE_THRESH_GAUSSIAN_C, cv2.THRESH_BINARY_INV, 11, 2)
ret, test_image = cv2.threshold(th3, 10, 255, cv2.THRESH_BINARY_INV+cv2.THRESH_OTSU)

kernel = np.ones((3, 3), np.uint8)

# opening the image
opening = cv2.morphologyEx(binr, cv2.MORPH_OPEN,
                           kernel, iterations=1)

如果生成的图像不够好，请尝试增加内核大小

Answer 2

如果你会考虑Scikit-Image ，而不是 OpenCV，这是一种方法。

import numpy as np
import matplotlib.pyplot as plt

from skimage import io
from skimage import segmentation
from skimage import morphology

image = io.imread("your_image.jpeg")
seg_img = segmentation.chan_vese(image,mu=.3) 
rsh_img = morphology.remove_small_holes(seg_img,area_threshold=32)