Canny Edge Detector

Orginal image

we need rgb to gray

gray = cv2.cvtColor(image_copy, cv2.COLOR_RGB2GRAY)

plt.imshow(gray, cmap="gray")

we need lower and upper for Canny

lower = 120
upper = 240

edges = cv2.Canny(gray, lower, upper)
plt.imshow(edges, cmap="gray")

More details for Canny

Different wide and tight

wide = cv2.Canny(gray, 30, 100)
tight = cv2.Canny(gray, 180, 240)

f, (ax1, ax2) = plt.subplots(1,2, figsize=(20,10))

ax1.imshow(wide, cmap="gray")
ax1.set_title("Wide")

ax2.imshow(tight, cmap="gray")
ax2.set_title("Tight")