# 実験課題5
# 3.5 エッジ処理

import cv2

image_path = 'sample.jpg'
img = cv2.imread(image_path, cv2.IMREAD_GRAYSCALE)

if img is not None:
    # Sobel
    sobel_x = cv2.Sobel(img, cv2.CV_64F, 1, 0, ksize=3)
    sobel_y = cv2.Sobel(img, cv2.CV_64F, 0, 1, ksize=3)
    sobel_x_abs = cv2.convertScaleAbs(sobel_x)
    sobel_y_abs = cv2.convertScaleAbs(sobel_y)
    sobel_combined = cv2.addWeighted(sobel_x_abs, 0.5, sobel_y_abs, 0.5, 0)
    cv2.imwrite('3_5_sobel.jpg', sobel_combined)

    # Laplacian
    laplacian = cv2.Laplacian(img, cv2.CV_64F)
    laplacian_abs = cv2.convertScaleAbs(laplacian)
    cv2.imwrite('3_5_laplacian.jpg', laplacian_abs)

    # Canny
    canny = cv2.Canny(img, 50, 150)
    cv2.imwrite('3_5_canny.jpg', canny)