Image capture from Alacron FastFrame-CB

[phishboh]

Hi.

I would like to perform some image processing using Python.
Can someone please point me in the right direction on how to get
images from the framegrabber (Alacron FastFrame-CB)?
Is VideoCapture (http://videocapture.sourceforge.net/) the correct way
to go?

Thanks in advance.
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Image capture

[Catalin Lungu]

Hi,
Can anybody help me to implement the following VB code in Python. Thanks in 
advance.

Private Declare Function SendMessage Lib user32.dll Alias _
   SendMessageA (ByVal hwnd As Long, ByVal wMsg As Long, _
   ByVal wParam As Long, ByVal lParam As Long) As Long

Private Const WM_PAINT = HF
Private Const WM_PRINT = H317
Private Const PRF_CLIENT = H4
Private Const PRF_CHILDREN = H10
Private Const PRF_OWNED = H20

Private Sub Command1_Click()
   SendMessage grid.hwnd, WM_PAINT, picture.hDC, 0
   SendMessage grid.hwnd, WM_PRINT, picture.hDC, PRF_CHILDREN Or PRF_CLIENT
Or PRF_OWNED
   picture.Picture = picture.Image
   picture.Refresh
End Sub


Catalin
[EMAIL PROTECTED] 


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Re: Image capture

[Kartic]

Catalin,

Some explanation about what you are tring to do will be of immense
help.

Did you want to capture some other Windows object from Python or do you
want to capture a Python GUI application from Python?

I might be able to help out, but please send more details.
Thank you,
--Kartic

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Re: Image capture

[Catalin Lungu]

Hi,

I want to capture a no visible area of a wxFrame of  Python. This area 
contain  a wxGrid object. In VB6 this code work very good.

Thanks.

Kartic [EMAIL PROTECTED] escribió en el mensaje 
news:[EMAIL PROTECTED]
 Catalin,

 Some explanation about what you are tring to do will be of immense
 help.

 Did you want to capture some other Windows object from Python or do you
 want to capture a Python GUI application from Python?

 I might be able to help out, but please send more details.
 Thank you,
 --Kartic
 


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Re: Image capture

[Kartic]

Hi Catalin,

Here are the modifications to your code. I am emailing you the complete
file back to your email address. Please note that you need PIL (Python
Imaging Library) to grab the window. I included a step to save the
image, but you can do whatever you want with it.

Thanks,
--Kartic

-- Unified Diff ---

--- Catalin.txt Wed Jan 05 11:43:38 2005
+++ frmDesign.pyWed Jan 05 11:43:17 2005
@@ -1,7 +1,7 @@
from wxPython.wx import *
from wxPython.grid import *
from win32api import SendMessage
-import win32ui
+import win32ui, win32gui, ImageGrab

WM_PAINT = 0xf
WM_PRINT = 0x317
@@ -47,6 +47,10 @@
dc = wxMemoryDC()
dc.SelectObject(bmp)
dc.Clear()
+   win_sz = win32gui.GetWindowRect(self.grd.GetHandle())
+   print win_sz
+   im = ImageGrab.grab((win_sz[0],win_sz[1],win_sz[2],win_sz[3]))
+   im.save('C:/TEMP/grid.jpg')
SendMessage(self.grd.GetHandle(), WM_PAINT, dc.GetHDC(), 0)
SendMessage(self.grd.GetHandle(), WM_PRINT, dc.GetHDC(),
PRF_CHILDREN|PRF_CLIENT|PRF_OWNED)

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