Best value for threshold in Canny

Question

I have an image which I want to detect edges on that. I found Canny has been used a lot ( I don\'t know whether I have a better option than that). I have set the values as f

Answer 1

You can use this equation it is useful and you can apply bluer to enhance it.

blurred_img = cv2.blur(img,ksize=(5,5))
med_val = np.median(img) 
lower = int(max(0 ,0.7*median_pix))
upper = int(min(255,1.3*median_pix))
edges = cv2.Canny(image=img, threshold1=lower,threshold2=upper)