Created
May 11, 2022 03:20
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import numpy as np | |
import cv2 | |
import sys | |
def main(): | |
print("OpenCV Version: " + str(cv2.__version__)) | |
# Loading image data (GRAYSCALE) | |
filename = "image.png" | |
image = cv2.imread(filename, cv2.IMREAD_GRAYSCALE) | |
if image is None: | |
print("Cannot find image data : " + filename) | |
sys.exit() | |
# Sobel filter (horizontal) | |
image_sobel_h = sobel_horizontal(image) | |
# Sobel filter (vertical) | |
image_sobel_v = sobel_vertical(image) | |
# Sobel filter (horizontal & vertical) | |
image_sobel = sobel(image) | |
# Saving image | |
cv2.imwrite('image_sobel_h.png',image_sobel_h) | |
cv2.imwrite('image_sobel_v.png',image_sobel_v) | |
cv2.imwrite('image_sobel.png',image_sobel) | |
def sobel_horizontal(image): | |
kernel_sobel_h = np.array([[-1, -2, -1], | |
[0, 0, 0], | |
[1, 2, 1]]) | |
image_output = cv2.filter2D(image, cv2.CV_64F, kernel_sobel_h) | |
return image_output | |
def sobel_vertical(image): | |
kernel_sobel_v = np.array([[-1, 0, 1], | |
[-2, 0, 2], | |
[-1, 0, 1]]) | |
image_output = cv2.filter2D(image, cv2.CV_64F, kernel_sobel_v) | |
return image_output | |
def sobel(image): | |
image_h = sobel_horizontal(image) | |
image_v = sobel_vertical(image) | |
image_output = np.sqrt(image_h ** 2 + image_v ** 2) | |
return image_output | |
if __name__ == "__main__": | |
main() |
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