Initial pass at some boost python bindings.

samples/python/boost/camera.py

@@ -0,0 +1,10 @@
+import opencv
+
+capture = opencv.VideoCapture(0)
+img = opencv.Mat()
+
+while True:
+    capture.read(img)
+    opencv.imshow("camera",img)
+    if opencv.waitKey(10) == 27:
+        break

samples/python/boost/subwindow.py

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+#!/usr/bin/env python
+
+import opencv
+
+class SubwindowDemo:
+
+    def __init__(self):
+        self.capture = opencv.VideoCapture(0)
+        self.capture.set(opencv.CV_CAP_PROP_FRAME_HEIGHT, 1000)
+        self.capture.set(opencv.CV_CAP_PROP_FRAME_WIDTH, 1000)
+        opencv.namedWindow( "Video", opencv.CV_WINDOW_KEEPRATIO)
+        opencv.namedWindow( "Track Window", opencv.CV_WINDOW_KEEPRATIO)
+
+        opencv.setMouseCallback( "Video", self.on_mouse,None)
+
+        self.drag_start = None      # Set to (x,y) when mouse starts drag
+        self.track_window = None    # Set to rect when the mouse drag finishes
+
+        print( "Keys:\n"
+            "    ESC,q - quit the program\n"
+            "To initialize the subwindow, drag across the image with the mouse\n" )
+    def __del__(self):
+        opencv.setMouseCallback( "Video", None,None)
+
+    def on_mouse(self, event, x, y, flags, param):
+        #print "caught mouse", event,x,y,flags,param
+        if event == opencv.CV_EVENT_LBUTTONDOWN:
+            self.drag_start = (x, y)
+        if event == opencv.CV_EVENT_LBUTTONUP:
+            self.drag_start = None
+            if 0 not in self.selection:
+                self.track_window = self.selection
+        if self.drag_start:
+            xmin = min(x, self.drag_start[0])
+            ymin = min(y, self.drag_start[1])
+            xmax = max(x, self.drag_start[0])
+            ymax = max(y, self.drag_start[1])
+            self.selection = (xmin, ymin, xmax - xmin, ymax - ymin)
+
+    def run(self):
+        img = opencv.Mat()
+        img_sub = opencv.Mat()
+        while True:
+            #grab a frame
+            self.capture.read(img)
+            #uses imshow
+            opencv.imshow("Video",img)
+            
+            if self.track_window:
+                #show a sub region
+                img_sub = img.roi(opencv.Rect(*self.track_window))
+                opencv.imshow("Track Window",img_sub)
+            
+            #wait for a key, returns an int
+            key = opencv.waitKey(10)
+            if key in ( 27, ord('q')):
+                break
+            
+
+
+if __name__=="__main__":
+    demo = SubwindowDemo()
+    demo.run()
+    opencv.setMouseCallback( "Video", None,None)