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update detectMultiScale

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

-4

lines changed

Lines changed: 4 additions & 3 deletions

Original file line number	Diff line number	Diff line change
`@@ -25,7 +25,8 @@`
`25`	`25`	`# cv2.imshow('gray', gray)`
`26`	`26`
`27`	`27`
`28`		`-faces = face_cascade.detectMultiScale(gray, 1.3, 5)`
	`28`	`+# faces = face_cascade.detectMultiScale(gray, 1.3, 5)`
	`29`	`+faces = face_cascade.detectMultiScale(gray, scaleFactor=1.1, minNeighbors=5, minSize=(30, 30), flags=cv2.CASCADE_SCALE_IMAGE)`
`29`	`30`	`print("Detected ", len(faces), " face")`
`30`	`31`
`31`	`32`	`plt.ion()`
`@@ -40,11 +41,11 @@`
`40`	`41`	`plt.imshow(cv2.cvtColor(img, cv2.COLOR_BGR2RGB))`
`41`	`42`	`plt.show()`
`42`	`43`	`# cv2.waitKey(500)`
`43`		`- plt.pause(2)`
	`44`	`+ plt.pause(1)`
`44`	`45`	`# sleep(2)`
`45`	`46`	`# sleep(2)`
`46`	`47`	`# cv2.waitKey(500)`
`47`		`- plt.pause(2)`
	`48`	`+ plt.pause(1)`
`48`	`49`
`49`	`50`	`# plt.show()`
`50`	`51`	`plt.show(block=True)`

Lines changed: 2 additions & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -40,7 +40,8 @@`
`40`	`40`	`# have to retain it.`
`41`	`41`	`# minSize – Minimum possible object size. Objects smaller than that are ignored.`
`42`	`42`	`# maxSize – Maximum possible object size. Objects larger than that are ignored.`
`43`		`-faces = face_cascade.detectMultiScale(gray, 1.3, 5)`
	`43`	`+# faces = face_cascade.detectMultiScale(gray, 1.3, 5)`
	`44`	`+faces = face_cascade.detectMultiScale(gray, scaleFactor=1.1, minNeighbors=5, minSize=(30, 30), flags=cv2.CASCADE_SCALE_IMAGE)#改进`
`44`	`45`	`print("Detected ", len(faces), " face")`
`45`	`46`
`46`	`47`	`for (x, y, w, h) in faces:`

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