Suppose I have a hollow, curved (and not necessarily convex) mask that I received from my pretreatment steps:
I now want to try to select all the pixels that occur inside this shape and add them to the mask, as follows:
How can I do this in Python?
Code to generate the examples:
import cv2 import numpy as np import matplotlib.pyplot as plt # Parameters for creating the circle COLOR_BLUE = (255, 0, 0) IMAGE_SHAPE = (256, 256, 3) CIRCLE_CENTER = tuple(np.array(IMAGE_SHAPE) // 2)(:-1) CIRCLE_RADIUS = 30 LINE_THICKNESS = 5 # Change to -1 for example of filled circle # Draw on a circle img = np.zeros(IMAGE_SHAPE, dtype=np.uint8) img_circle = cv2.circle(img, CIRCLE_CENTER, CIRCLE_RADIUS, COLOR_BLUE, LINE_THICKNESS) circle_mask = img_circle(:, :, 0) # Show the image plt.axis("off") plt.imshow(circle_mask) plt.show()