Leandro Vasco da Rocha
2012-11-14 12:43:06 UTC
Hello,
I was studying opencv for python and I found Mahotas.
I have to solve the following problem: I will send a picture and the system will
search a database of images with different images which are similar to the
one that was sent (like google search images). My desire is to bring the
images that have over 70% similarity.
What is the best way to do this? Any suggestions?
I'm do one test using opencv and Py2.7, but now I need to compare the
images and obtain percent of common points.
*# Load the images**
img =cv2.imread(MEDIA_ROOT + "/uploads/imagerecognize/armchair.jpg")
# Convert them to grayscale
imgg =cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)
# SURF extraction
surf = cv2.FeatureDetector_create("SURF")
surfDescriptorExtractor = cv2.DescriptorExtractor_create("SURF")
kp = surf.detect(imgg)
kp, descritors = surfDescriptorExtractor.compute(imgg,kp)
# Setting up samples and responses for kNN
samples = np.array(descritors)
responses = np.arange(len(kp),dtype = np.float32)
# kNN training
knn = cv2.KNearest()
knn.train(samples,responses)
modelImages = [MEDIA_ROOT + "/uploads/imagerecognize/1.jpg", MEDIA_ROOT
+ "/uploads/imagerecognize/2.jpg", MEDIA_ROOT +
"/uploads/imagerecognize/3.jpg"]
for modelImage in modelImages:
# Now loading a template image and searching for similar keypoints
template = cv2.imread(modelImage)
templateg= cv2.cvtColor(template,cv2.COLOR_BGR2GRAY)
keys = surf.detect(templateg)
keys,desc = surfDescriptorExtractor.compute(templateg, keys)
for h,des in enumerate(desc):
des = np.array(des,np.float32).reshape((1,128))
retval, results, neigh_resp, dists = knn.find_nearest(des,1)
res,dist = int(results[0][0]),dists[0][0]
if dist<0.1: # draw matched keypoints in red color
color = (0,0,255)
else: # draw unmatched in blue color
#print dist
color = (255,0,0)
#Draw matched key points on original image
x,y = kp[res].pt
center = (int(x),int(y))
cv2.circle(img,center,2,color,-1)
#Draw matched key points on template image
x,y = keys[h].pt
center = (int(x),int(y))
cv2.circle(template,center,2,color,-1)
cv2.imshow('img',img)
cv2.imshow('tm',template)
cv2.waitKey(0)
cv2.destroyAllWindows()*
Thanks!
Best regards,
Leandro.
--
I was studying opencv for python and I found Mahotas.
I have to solve the following problem: I will send a picture and the system will
search a database of images with different images which are similar to the
one that was sent (like google search images). My desire is to bring the
images that have over 70% similarity.
What is the best way to do this? Any suggestions?
I'm do one test using opencv and Py2.7, but now I need to compare the
images and obtain percent of common points.
*# Load the images**
img =cv2.imread(MEDIA_ROOT + "/uploads/imagerecognize/armchair.jpg")
# Convert them to grayscale
imgg =cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)
# SURF extraction
surf = cv2.FeatureDetector_create("SURF")
surfDescriptorExtractor = cv2.DescriptorExtractor_create("SURF")
kp = surf.detect(imgg)
kp, descritors = surfDescriptorExtractor.compute(imgg,kp)
# Setting up samples and responses for kNN
samples = np.array(descritors)
responses = np.arange(len(kp),dtype = np.float32)
# kNN training
knn = cv2.KNearest()
knn.train(samples,responses)
modelImages = [MEDIA_ROOT + "/uploads/imagerecognize/1.jpg", MEDIA_ROOT
+ "/uploads/imagerecognize/2.jpg", MEDIA_ROOT +
"/uploads/imagerecognize/3.jpg"]
for modelImage in modelImages:
# Now loading a template image and searching for similar keypoints
template = cv2.imread(modelImage)
templateg= cv2.cvtColor(template,cv2.COLOR_BGR2GRAY)
keys = surf.detect(templateg)
keys,desc = surfDescriptorExtractor.compute(templateg, keys)
for h,des in enumerate(desc):
des = np.array(des,np.float32).reshape((1,128))
retval, results, neigh_resp, dists = knn.find_nearest(des,1)
res,dist = int(results[0][0]),dists[0][0]
if dist<0.1: # draw matched keypoints in red color
color = (0,0,255)
else: # draw unmatched in blue color
#print dist
color = (255,0,0)
#Draw matched key points on original image
x,y = kp[res].pt
center = (int(x),int(y))
cv2.circle(img,center,2,color,-1)
#Draw matched key points on template image
x,y = keys[h].pt
center = (int(x),int(y))
cv2.circle(template,center,2,color,-1)
cv2.imshow('img',img)
cv2.imshow('tm',template)
cv2.waitKey(0)
cv2.destroyAllWindows()*
Thanks!
Best regards,
Leandro.
--