Source Code for Module pyvision.other.surf

 1  ''' 
 2  Created on Feb 2, 2011 
 3   
 4  @author: bolme 
 5  ''' 
 6   
 7  #import pyvision as pv 
 8  import cv 
 9   
10 -def surf(im,mask=None,extended=False,hessianThreshold=500, nOctaves=3, nOctaveLayers=4): 
11      ''' 
12      Keypoints contain a 
13        0: center point 
14        1 sign of laplacian (-1,0,+1) 
15        2 scale - diameter or radius 
16        3 angle 
17        4 response value 
18       
19      Descriptors contain 64 floating point numbers 
20       
21      @param im: image to extract features from. 
22      @type im:  pv.Image 
23      @param mask: a mask that controls where features are extracted from. 
24      @type mask:  OpenCV 8bit image 
25      @return: (keypoints,descriptors) 
26      ''' 
27      cvim = im.asOpenCVBW() 
28      keypoints,descriptors = cv.ExtractSURF(cvim,mask,cv.CreateMemStorage(),(int(extended),hessianThreshold,nOctaves,nOctaveLayers)) 
29      return keypoints,descriptors 
30