OpenCV/Face Detection - Revision history

Admin: /* Basic Face Detection Example */

2017-10-27T08:31:51Z

Basic Face Detection Example

← Older revision		Revision as of 08:31, 27 October 2017
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	eye_cascade = cv2.CascadeClassifier('haarcascade_eye.xml')		eye_cascade = cv2.CascadeClassifier('haarcascade_eye.xml')

	img = cv2.imread('~~face~~.jpg')		img = cv2.imread('images/bush.jpg')
	gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)		gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)

	faces = face_cascade.detectMultiScale(gray, 1.3, 5)		faces = face_cascade.detectMultiScale(gray, 1.3, 5)
	for (x,y,w,h) in faces:		for (x,y,w,h) in faces:
	cv2.rectangle(img,(x,y),(x+w,y+h),(255,0,0),2)		cv2.rectangle(img,(x,y),(x+w,y+h),(0,255,0),2)
	roi_gray = gray[y:y+h, x:x+w]		roi_gray = gray[y:y+h, x:x+w]
	roi_color = img[y:y+h, x:x+w]		roi_color = img[y:y+h, x:x+w]
	eyes = eye_cascade.detectMultiScale(roi_gray)		# If the 1.07 parameter becomes 1.08 we only detect right eye (???)
			eyes = eye_cascade.detectMultiScale(roi_gray, 1.07, 1)
	for (ex,ey,ew,eh) in eyes:		for (ex,ey,ew,eh) in eyes:
	cv2.rectangle(roi_color,(ex,ey),(ex+ew,ey+eh),(0,255,0),2)		cv2.rectangle(roi_color,(ex,ey),(ex+ew,ey+eh),(0,0,255),2)

			cv2.imwrite("detected_faces.jpg", img)
	cv2.imshow('img',img)		cv2.imshow('img',img)
	cv2.waitKey(0)		cv2.waitKey(0)

Admin: /* Basic Face Detection Example */

2017-10-27T08:29:39Z

Basic Face Detection Example

← Older revision		Revision as of 08:29, 27 October 2017
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	The result:		The result:

	[[Image:DetectedFaces.jpg\|~~400px~~]]		[[Image:DetectedFaces.jpg\|200px]]

	Gist with simple OpenCV facial detection algorithm script: https://gist.github.com/charlesreid1/381bb27eea325d24eeb3a11dbb113dbf		Gist with simple OpenCV facial detection algorithm script: https://gist.github.com/charlesreid1/381bb27eea325d24eeb3a11dbb113dbf

Admin: /* Basic Face Detection */

2017-10-27T08:29:29Z

Basic Face Detection

← Older revision		Revision as of 08:29, 27 October 2017
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	=Code=		=Code=

	==Basic Face Detection==		==Basic Face Detection Example==


			Here is a very simple face detection example:

	<pre>		<pre>
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	</pre>		</pre>

			The result:

			[[Image:DetectedFaces.jpg\|400px]]

	Gist with simple OpenCV facial detection algorithm script: https://gist.github.com/charlesreid1/381bb27eea325d24eeb3a11dbb113dbf		Gist with simple OpenCV facial detection algorithm script: https://gist.github.com/charlesreid1/381bb27eea325d24eeb3a11dbb113dbf

Admin: /* Related */

2017-10-27T08:22:59Z

← Older revision		Revision as of 08:22, 27 October 2017
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	=Related=		=Related=

	[[OpenCV]]		* [[OpenCV]]

	[[RaspberryPi/USB Camera]]		* [[RaspberryPi/USB Camera]]

	=Flags=		=Flags=

Admin: /* Haar Cascades */

2017-10-27T08:20:20Z

Haar Cascades

← Older revision		Revision as of 08:20, 27 October 2017
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	* Main opencv repository (version 2.4): https://github.com/opencv/opencv/tree/2.4/data/haarcascades		* Main opencv repository (version 2.4): https://github.com/opencv/opencv/tree/2.4/data/haarcascades
	* opencv_contributions repository: https://github.com/opencv/opencv_contrib/tree/master/modules/face/data/cascades		* opencv_contributions repository: https://github.com/opencv/opencv_contrib/tree/master/modules/face/data/cascades

	This page contains an example of how to use the Haar cascade to detect multiple faces and eyes in a photograph: https://opencv-python-tutroals.readthedocs.io/en/latest/py_tutorials/py_objdetect/py_face_detection/py_face_detection.html#face-detection

	=Code=		=Code=

Admin: /* Basic Face Detection */

2017-10-27T08:20:00Z

Basic Face Detection

← Older revision		Revision as of 08:20, 27 October 2017
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	faces = face_cascade.detectMultiScale(gray, 1.3, 5)		faces = face_cascade.detectMultiScale(gray, 1.3, 5)
	for (x,y,w,h) in faces:		for (x,y,w,h) in faces:
	~~img =~~ cv2.rectangle(img,(x,y),(x+w,y+h),(255,0,0),2)		cv2.rectangle(img,(x,y),(x+w,y+h),(255,0,0),2)
	roi_gray = gray[y:y+h, x:x+w]		roi_gray = gray[y:y+h, x:x+w]
	roi_color = img[y:y+h, x:x+w]		roi_color = img[y:y+h, x:x+w]
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	Gist with simple OpenCV facial detection algorithm script: https://gist.github.com/charlesreid1/381bb27eea325d24eeb3a11dbb113dbf		Gist with simple OpenCV facial detection algorithm script: https://gist.github.com/charlesreid1/381bb27eea325d24eeb3a11dbb113dbf


	=Related=		=Related=

Admin at 07:17, 27 October 2017

2017-10-27T07:17:54Z

@@ Line 1: / Line 1: @@
-{{Main|OpenCV}}
+This page covers how to do facial detection using OpenCV's built-in feature detection algorithms. Note that these require OpenCV >= 2.4.
 Gist with simple OpenCV facial detection algorithm script: https://gist.github.com/charlesreid1/381bb27eea325d24eeb3a11dbb113dbf
-==Raspberry Pi==
+=Related=
-Related page: [RaspberryPi/USB Camera]]
+[[RaspberryPi/USB Camera]]
 =Flags=

Admin: /* Basic Template */

2017-10-23T03:00:30Z

Basic Template

← Older revision		Revision as of 03:00, 23 October 2017
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			==Raspberry Pi==

			Related page: [RaspberryPi/USB Camera]]

	=Flags=		=Flags=

Admin at 02:55, 23 October 2017

2017-10-23T02:55:33Z

← Older revision		Revision as of 02:55, 23 October 2017
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	This page covers how to do facial detection using OpenCV's built-in feature detection algorithms. Note that these require OpenCV > 2.4.		This page covers how to do facial detection using OpenCV's built-in feature detection algorithms. Note that these require OpenCV > 2.4.

			==Basic Template==

			Gist with simple OpenCV facial detection algorithm script: https://gist.github.com/charlesreid1/381bb27eea325d24eeb3a11dbb113dbf

Admin: Created page with "{{Main|OpenCV}} This page covers how to do facial detection using OpenCV's built-in feature detection algorithms. Note that these require OpenCV > 2.4. =Flags= Categor..."

2017-10-23T02:51:18Z

Created page with "{{Main|OpenCV}} This page covers how to do facial detection using OpenCV's built-in feature detection algorithms. Note that these require OpenCV > 2.4. =Flags= Categor..."

New page

{{Main|OpenCV}}

This page covers how to do facial detection using OpenCV's built-in feature detection algorithms. Note that these require OpenCV > 2.4.

=Flags=

[[Category:Faces]]
[[Category:Images]]
[[Category:OpenCV]]