OpenCV with Python By Example

Detecting ears

Since we know how the pipeline works, let's just jump into the code:

import cv2 import numpy as np left_ear_cascade = cv2.CascadeClassifier('./cascade_files/haarcascade_mcs_leftear.xml') right_ear_cascade = cv2.CascadeClassifier('./cascade_files/haarcascade_mcs_rightear.xml') if left_ear_cascade.empty(): raise IOError('Unable to load the left ear cascade classifier xml file') if right_ear_cascade.empty(): raise IOError('Unable to load the right ear cascade classifier xml file') img = cv2.imread('input.jpg') gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY) left_ear = left_ear_cascade.detectMultiScale(gray, 1.3, 5) right_ear = right_ear_cascade.detectMultiScale(gray, 1.3, 5) for (x,y,w,h) in left_ear: cv2.rectangle(img, (x,y), (x+w,y+h), ...