In Traction - Latest Comments

Re: Fun with Python, OpenCV and face detection

jozilla — Mon, 07 Dec 2009 16:21:43 -0000

Thanks a lot! I'll give it a try!

Re: Fun with Python, OpenCV and face detection

the-maxx — Fri, 04 Dec 2009 15:52:35 -0000

argh, it killed my tabs!!!

Re: Fun with Python, OpenCV and face detection

the-maxx — Fri, 04 Dec 2009 15:50:52 -0000

hi, i stumbled upon your little nice python script a few days ago and ported it to opencv 2.0 with its new python bindings. Hope anyone is interested, maybe you can update your version with this.

import sys
import cv

class FaceDetect():
def __init__(self):
cv.NamedWindow ("CamShiftDemo", 1)
device = 0
self.capture = cv.CaptureFromCAM(device)
capture_size = (320,200)
cv.SetCaptureProperty(self.capture, cv.CV_CAP_PROP_FRAME_WIDTH, capture_size[0])
cv.SetCaptureProperty(self.capture, cv.CV_CAP_PROP_FRAME_HEIGHT, capture_size[1])

def detect(self):
cv.CvtColor(self.frame, self.grayscale, cv.CV_RGB2GRAY)

#equalize histogram
cv.EqualizeHist(self.grayscale, self.grayscale)

# detect objects
faces = cv.HaarDetectObjects(image=self.grayscale, cascade=self.cascade, storage=self.storage, scale_factor=1.2,\
min_neighbors=2, flags=cv.CV_HAAR_DO_CANNY_PRUNING)

if faces:
#print 'face detected!'
for i in faces:
if i[1] > 10:
cv.Circle(self.frame, ((2*i[0][0]+i[0][2])/2,(2*i[0][1]+i[0][3])/2), (i[0][2]+i[0][3])/4, (128, 255, 128), 2, 8, 0)

def run(self):
# check if capture device is OK
if not self.capture:
print "Error opening capture device"
sys.exit(1)

self.frame = cv.QueryFrame(self.capture)
self.image_size = cv.GetSize(self.frame)

# create grayscale version
self.grayscale = cv.CreateImage(self.image_size, 8, 1)

# create storage
self.storage = cv.CreateMemStorage(128)
self.cascade = cv.Load('haarcascade_frontalface_default.xml')

while 1:
# do forever
# capture the current frame
self.frame = cv.QueryFrame(self.capture)
if self.frame is None:
break

# mirror
cv.Flip(self.frame, None, 1)

# face detection
self.detect()

# display webcam image
cv.ShowImage('CamShiftDemo', self.frame)
# handle events
k = cv.WaitKey(10)

if k == 0x1b: # ESC
print 'ESC pressed. Exiting ...'
break
sys.exit(1)

if __name__ == "__main__":
print "Press ESC to exit ..."
face_detect = FaceDetect()
face_detect.run()

Re: Fun with Python, OpenCV and face detection

jozilla — Fri, 13 Nov 2009 08:06:02 -0000

You should install OpenCV first, and try to run the simple_winclient.py script. The software is available at my website.

Re: Fun with Python, OpenCV and face detection

njay — Fri, 13 Nov 2009 01:35:17 -0000

hey!! i am nj here, i am trying to execute this program on windows I am getting following error. I saw a post with same thing, where u said u will be releasing new version so that it works on windows. Is it not released yet?

Re: Fun with Python, OpenCV and face detection

club penguin cheats — Wed, 04 Nov 2009 10:25:23 -0000

this is awesome, i have been wanting to do this with python for awhile now. great stuff.

Re: Research update

jozilla — Sat, 31 Oct 2009 18:17:23 -0000

Thanks Ruben! :)

Re: Research update

Ruben — Sat, 31 Oct 2009 06:25:39 -0000

Great one-minute movie, I enjoyed it :-) I see your website also got a nice update in the publications section, cool!

Cheers
Ruben

Re: Fun with Python, OpenCV and face detection

jozilla — Fri, 30 Oct 2009 07:39:17 -0000

The script uses Gary Bishop's CVtypes, not python-opencv.

Re: How to efficiently perform a literature review

jozilla — Fri, 30 Oct 2009 06:18:37 -0000

Thanks Juan!

Re: How to efficiently perform a literature review

jumagoca78 — Thu, 29 Oct 2009 04:50:52 -0000

Excelent post Jo Very interesting and useful.

Re: New homepage

jumagoca78 — Fri, 16 Oct 2009 10:20:35 -0000

Jesus Jo. Your blog is very good. I will be following you.

Re: Fun with Python, OpenCV and face detection

online games — Wed, 23 Sep 2009 18:23:41 -0000

I'm still having trouble with the escape key. Any tips?

Re: Fun with Python, OpenCV and face detection

cyril84 — Mon, 14 Sep 2009 16:10:43 -0000

I have do sudo apt-get install python-opencv. It is already installed. What can i do?

Re: Fun with Python, OpenCV and face detection

cyril84 — Mon, 14 Sep 2009 16:08:10 -0000

Hello, i have this:

Traceback (most recent call last):
File "opencv.py", line 2, in <module>
from CVtypes import cv
ImportError: No module named CVtypes

What is this mistake? how install cvtypes?

Thinks

Re: Fun with Python, OpenCV and face detection

nop — Sun, 13 Sep 2009 08:39:25 -0000

In synaptic you can fing python-opencv

Re: Fun with Python, OpenCV and face detection

nop — Sun, 13 Sep 2009 08:26:26 -0000

yes, 9.04

Re: Fun with Python, OpenCV and face detection

cyril — Fri, 11 Sep 2009 13:00:39 -0000

Hello, i try your code but i have this:

cyril@zilo2:~/Bureau/test$ sudo python webcam2.py
Traceback (most recent call last):
File "webcam2.py", line 3, in <module>
from CVtypes import cv
ImportError: No module named CVtypes

i use ubuntu, how cab i install opencv? sudo apt-get install ?

Thinks @+

Re: Fun with Python, OpenCV and face detection

sreeraj — Thu, 27 Aug 2009 14:00:26 -0000

hi, i'm having this problem when i'm running your code..

i have an integrated camera on my laptop, which works with some apps like cheese.

while running this code, the camera(led) turns on, but nothing comes on the screen.
the script hangs and i have to ctrl+C to close it.

any pointers to help me with this situation will be appreciated.
thanks

Re: Fun with Python, OpenCV and face detection

ClubPenguinCheats — Thu, 20 Aug 2009 20:32:55 -0000

The script I wrote was based on the OpenCV face detection sample too, but using gstreamer instead of OpenCV's HighGUI to interface the webcam (HighGUI didn't support the camera in the XO).

Re: OneNote: a hidden Microsoft Office gem

ClubPenguinCheats — Thu, 20 Aug 2009 20:31:45 -0000

For projects and tasks as well as research I've been juggling Google apps, as well as Outlook tasks and cal, good old .txt files with .LOG tags added to the start as well as Tab groupings and sub groupings in IE and Firefox and don’t forget regular folders.

Re: Small update on face detection post

ClubPenguinCheats — Thu, 20 Aug 2009 20:30:25 -0000

I really want to learn DBUS and py-notify. Besides, it looks really nice your software, I would like to have a copy.

Re: MIT Media Lab wearable projector prototype

richardz315 — Sun, 16 Aug 2009 20:44:59 -0000

thank you for sharing this post

Re: OneNote: a hidden Microsoft Office gem

freegiftcards — Sun, 16 Aug 2009 12:34:10 -0000

I had never used One Note in past, I prefer a Google services, they gives some simplicity in my work, but after this article I have to review my opinion.

Re: Fun with Python, OpenCV and face detection

jozilla — Mon, 10 Aug 2009 08:23:45 -0000

It might be good to use a specific GUI toolkit in this case, such as WxWindows.

Have a look at Gary Bishop's blog post, where he grabs a bitmap from the camera and displays this in a Wx window: http://wwwx.cs.unc.edu/~gb/wp/blog/2007/02/04/p...