Hello folk. I just started using opencv--python.
Intially I typed in some code found here.
link text
But when I typed in the code to my windows 7 64 bit computer and ran it. After a few syntax errors and typos on my part it ran just fine. I dectected the web camera that I have plugged in and it displayed the cameras video in a window. But I do not get that blue square that says it has detected my face. I am using a celron 2200 mhz with 2gb of ram so its not the fastest computer . Is it just that my computer is slow or is there something wrong with the code?
Ok here is the code. It was in the youtube video on the link that I posted,
enter code here# ----------------------------------------
here#-------------------------------------------------------------------------------
image_viewer2.pyName: OpenCV Example of Face Detection from Facebook
Purpose:
#
Created 03-20-2010Author: DD
#
Author: Mike Driscoll
----------------------------------------Created: 12/01/2015
Copyright: (c) DD 2015
Licence: <your licence="">
-------------------------------------------------------------------------------
Facebook.com/RaspberryVi
import glob
numpy as np
import os
import wx
from wx.lib.pubsub import Publisher
#
class ViewerPanel(wx.Panel):
""""""cv2
some comment i a foreign language which I cannot understand. I will put it
thru Altavista later
face_cascade = cv2.CascadeClassifier('haarscascade_frontalface_default.xml')
video_capture = cv2.VideoCapture(0)
while True:
ret, frame = video_capture.read()
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
#capture test with image.
#img = cv2.imread("wyld2.jpg")
# gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
#----------------------------------------------------------------------
def __init__(self, parent):
"""Constructor"""
wx.Panel.__init__(self, parent)
width, height = wx.DisplaySize()
self.picPaths = []
self.currentPicture = 0
self.totalPictures = 0
self.photoMaxSize = height - 200
Publisher().subscribe(self.updateImages, ("update images"))
self.slideTimer = wx.Timer(None)
self.slideTimer.Bind(wx.EVT_TIMER, self.update)
self.layout()
#----------------------------------------------------------------------
def layout(self):
"""
Layout the widgets on the panel
"""
self.mainSizer = wx.BoxSizer(wx.VERTICAL)
btnSizer = wx.BoxSizer(wx.HORIZONTAL)
img = wx.EmptyImage(self.photoMaxSize,self.photoMaxSize)
self.imageCtrl = wx.StaticBitmap(self, wx.ID_ANY,
wx.BitmapFromImage(img))
self.mainSizer.Add(self.imageCtrl, 0, wx.ALL|wx.CENTER, 5)
self.imageLabel = wx.StaticText(self, label="")
self.mainSizer.Add(self.imageLabel, 0, wx.ALL|wx.CENTER, 5)
btnData = [("Previous", btnSizer, self.onPrevious),
("Slide Show", btnSizer, self.onSlideShow),
("Next", btnSizer, self.onNext)]
for data in btnData:
label, sizer, handler = data
self.btnBuilder(label, sizer, handler)
self.mainSizer.Add(btnSizer, 0, wx.CENTER)
self.SetSizer(self.mainSizer)
#----------------------------------------------------------------------
def btnBuilder(self, label, sizer, handler):
"""
Builds a button, binds it to an event handler and adds it to a sizer
"""
btn = wx.Button(self, label=label)
btn.Bind(wx.EVT_BUTTON, handler)
sizer.Add(btn, 0, wx.ALL|wx.CENTER, 5)
#----------------------------------------------------------------------
def loadImage(self, image):
""""""
image_name = os.path.basename(image)
img = wx.Image(image, wx.BITMAP_TYPE_ANY)
# scale the image, preserving the aspect ratio
W = img.GetWidth()
H = img.GetHeight()
faces = face_cascade.detectMultiScale(gray,1.3,5)
for(x,y,w,h) in faces:
cv2.rectangle(frame,(x,y),(x+w,y+h),(255,0,0),2)
cv2.imshow('video', frame)
#some more foreign comments
if W > H:
NewW = self.photoMaxSize
NewH = self.photoMaxSize * H / W
else:
NewH = self.photoMaxSize
NewW = self.photoMaxSize * W / H
img = img.Scale(NewW,NewH)
self.imageCtrl.SetBitmap(wx.BitmapFromImage(img))
self.imageLabel.SetLabel(image_name)
self.Refresh()
Publisher().sendMessage("resize", "")
#----------------------------------------------------------------------
def nextPicture(self):
"""
Loads the next picture in the directory
"""
if self.currentPicture cv2.waitKey(1) & 0xFF == self.totalPictures-1:
self.currentPicture = 0
else:
self.currentPicture += 1
self.loadImage(self.picPaths[self.currentPicture])
#----------------------------------------------------------------------
def previousPicture(self):
"""
Displays the previous picture in the directory
"""
if self.currentPicture == 0:
self.currentPicture = self.totalPictures - 1
else:
self.currentPicture -= 1
self.loadImage(self.picPaths[self.currentPicture])
#----------------------------------------------------------------------
def update(self, event):
"""
Called when the slideTimer's timer event fires. Loads the next
picture from the folder by calling th nextPicture method
"""
self.nextPicture()
#----------------------------------------------------------------------
def updateImages(self, msg):
"""
Updates the picPaths list to contain the current folder's images
"""
self.picPaths = msg.data
self.totalPictures = len(self.picPaths)
self.loadImage(self.picPaths[0])
#----------------------------------------------------------------------
def onNext(self, event):
"""
Calls the nextPicture method
"""
self.nextPicture()
#----------------------------------------------------------------------
def onPrevious(self, event):
"""
Calls the previousPicture method
"""
self.previousPicture()
#----------------------------------------------------------------------
def onSlideShow(self, event):
"""
Starts and stops the slideshow
"""
btn = event.GetEventObject()
label = btn.GetLabel()
if label == "Slide Show":
self.slideTimer.Start(3000)
btn.SetLabel("Stop")
else:
self.slideTimer.Stop()
btn.SetLabel("Slide Show")
ord('q'):
break
#
class ViewerFrame(wx.Frame):
""""""
#----------------------------------------------------------------------
video_capture.release()
cv2.destroyAllWindows()
def
__init__(self):
"""Constructor"""
wx.Frame.__init__(self, None, title="Image Viewer")
panel = ViewerPanel(self)
self.folderPath = ""
Publisher().subscribe(self.resizeFrame, ("resize"))
self.initToolbar()
self.sizer = wx.BoxSizer(wx.VERTICAL)
self.sizer.Add(panel, 1, wx.EXPAND)
self.SetSizer(self.sizer)
self.Show()
self.sizer.Fit(self)
self.Center()
#----------------------------------------------------------------------
def initToolbar(self):
"""
Initialize the toolbar
"""
self.toolbar = self.CreateToolBar()
self.toolbar.SetToolBitmapSize((16,16))
open_ico = wx.ArtProvider.GetBitmap(wx.ART_FILE_OPEN, wx.ART_TOOLBAR, (16,16))
openTool = self.toolbar.AddSimpleTool(wx.ID_ANY, open_ico, "Open", "Open an Image Directory")
self.Bind(wx.EVT_MENU, self.onOpenDirectory, openTool)
self.toolbar.Realize()
#----------------------------------------------------------------------
def onOpenDirectory(self, event):
"""
Opens a DirDialog to allow the user to open a folder with pictures
"""
dlg = wx.DirDialog(self, "Choose a directory",
style=wx.DD_DEFAULT_STYLE)
if dlg.ShowModal() == wx.ID_OK:
self.folderPath = dlg.GetPath()
print self.folderPath
picPaths = glob.glob(self.folderPath + "\\*.jpg")
print picPaths
Publisher().sendMessage("update images", picPaths)
#----------------------------------------------------------------------
def resizeFrame(self, msg):
""""""
self.sizer.Fit(self)
----------------------------------------------------------------------
main():
pass if __name__ == "__main__":
app = wx.App()
frame = ViewerFrame()
app.MainLoop()'__main__':
main()
