Image grab in Python
Hi, anyone know a Python library to grab the size of a selected image region (the selection will be made with the mouse), that work in Linux ? I found a module to do that in the PIL library but only work in Windows - http://www.pythonware.com/library/pil/handbook/imagegrab.htm Thanks in advance. Best regards, -- Valério Valério http://www.valeriovalerio.org -- http://mail.python.org/mailman/listinfo/python-list
Re: Image grab in Python
I can grab the image, I need a way of grab the region size with the mouse, a easy way of the user select a region of the image to analyze, something like the "Rectangle selection tool" of gimp. Regards, -- Valério Valério http://www.valeriovalerio.org 2008/5/4 David <[EMAIL PROTECTED]>: > On Sun, May 4, 2008 at 4:25 PM, Valerio Valerio <[EMAIL PROTECTED]> wrote: > > Hi, > > > > anyone know a Python library to grab the size of a selected image region > > (the selection will be made with the mouse), that work in Linux ? > > You might be able to use this tool: > > http://freshmeat.net/projects/gtkshots/ > > David. > -- http://mail.python.org/mailman/listinfo/python-list
Re: Image grab in Python
Hi, 2008/5/4 David <[EMAIL PROTECTED]>: > On Sun, May 4, 2008 at 5:28 PM, Valerio Valerio <[EMAIL PROTECTED]> wrote: > > I can grab the image, I need a way of grab the region size with the > mouse, > > a easy way of the user select a region of the image to analyze, > something > > like the "Rectangle selection tool" of gimp. > > > > I assume what you want to do is allow the user to drag the mouse > across your desktop, and your program, running in the background, > picks this up? As opposed to the user making a rectangular selection > entirely within your app. What I want is display a window with a image, the user select a region of the image, and the region value is passed to my program, my program slice the image region, and analyze it. I think the Xlib libraries can help in my task, thanks for the help :) Cheers, -- Valério Valério http://www.valeriovalerio.org > > I think the simplest way to do this is to capture the entire screen, > then show it as an image on a window covering the entire screen (eg: > fullscreen mode, or a regular window without decorations). Then > listen for mouse events. There should be a way to show the 'rectangle > elastic band' at the same time. Otherwise just draw a rectangle > between where the user first clicked and where the mouse is now (until > they release the mouse button). > > Another way would be to listen to all events sent through X, and act > based on the mouse events. VNC does something similar. > > A good starting point would be the Python xlib libraries: > > http://python-xlib.sourceforge.net/ > > David. > -- http://mail.python.org/mailman/listinfo/python-list
Re: Image grab in Python
2008/5/4 David <[EMAIL PROTECTED]>: > > What I want is display a window with a image, the user select a region > of > > the image, and the region value is passed to my program, my program > slice > > the image region, and analyze it. > > > > If it's your apps own window, then getting a rectangle selected by the > user is simple. > > 1) Make skeleton x/gtk/wx/qt/etc app > 2) Add code to show an image > 3) Add code to capture mouse events > 4) Add code to show the 'rubber band' rectangle over the mouse selection > area > 5) When the user releases the mouse, then extract the part of the > rectangle between where a mouse button was clicked and where it was > released. > > All this would be in the docs for the Python x/gtk/wx/qt/etc libs. > Where is the difficulty? Right now I don't have any difficulty :) I just asked for a library to do that, if exist I don't have to write all the things from scratch (the selection part), but I am able to do my tasks easily with Xlib or Pygame. Thanks for the help. Cheers, -- Valério Valério http://www.valeriovalerio.org > > David. > -- http://mail.python.org/mailman/listinfo/python-list
