update detectMultiScale

Author: makelove

ch02-安装OpenCV/最简单-使用pip安装opencv-python和opencv-contrib-python/test_opencv_contrib_python.py

@@ -25,7 +25,8 @@
 # cv2.imshow('gray', gray)
 
 
-faces = face_cascade.detectMultiScale(gray, 1.3, 5)
+# faces = face_cascade.detectMultiScale(gray, 1.3, 5)
+faces = face_cascade.detectMultiScale(gray, scaleFactor=1.1, minNeighbors=5, minSize=(30, 30), flags=cv2.CASCADE_SCALE_IMAGE)
 print("Detected ", len(faces), " face")
 
 plt.ion()
@@ -40,11 +41,11 @@
         plt.imshow(cv2.cvtColor(img, cv2.COLOR_BGR2RGB))
         plt.show()
         # cv2.waitKey(500)
-        plt.pause(2)
+        plt.pause(1)
         # sleep(2)
     # sleep(2)
     # cv2.waitKey(500)
-    plt.pause(2)
+    plt.pause(1)
 
 # plt.show()
 plt.show(block=True)

ch51-对象检测-使用Haar分类器进行面部检测/51.CascadeClassifier级联分类器.py

@@ -40,7 +40,8 @@
 # have to retain it.
 # minSize – Minimum possible object size. Objects smaller than that are ignored.
 # maxSize – Maximum possible object size. Objects larger than that are ignored.
-faces = face_cascade.detectMultiScale(gray, 1.3, 5)
+# faces = face_cascade.detectMultiScale(gray, 1.3, 5)
+faces = face_cascade.detectMultiScale(gray, scaleFactor=1.1, minNeighbors=5, minSize=(30, 30), flags=cv2.CASCADE_SCALE_IMAGE)#改进
 print("Detected ", len(faces), " face")
 
 for (x, y, w, h) in faces: