# Revision history [back]

### using surffeaturedetector, findHomography() to find am

i have an image where i want to remove the center only. how can i do so?

i played around with this tutorial. at first i found a match but that was when i used 2.4. I switched over to 3.0 and even if i followed the tutorial and changed some syntax for 3.0, it doesnt find the right match.

the only things ive changed from the tutorial is

// this
SurfFeatureDenter code hereetector detector( minHessian );
// to this
Ptr<SurfFeatureDetector> detector = SURF::create(minHessian);

//and this
SurfDescriptorExtractor extractor;
// to this
Ptr<SurfDescriptorExtractor> extractor = SURF::create();


where

int minHessian = 400;


im not sure if im instantiating it right or not. thanks in advance!

note: opencv 3.0 beta, qt, windows 8.1

### using surffeaturedetector, findHomography() to find ama match

i have an image where i want to remove the center only. how can i do so?

i played around with this tutorial. at first i found a match but that was when i used 2.4. I switched over to 3.0 and even if i followed the tutorial and changed some syntax for 3.0, it doesnt find the right match.

the only things ive changed from the tutorial is

// this
SurfFeatureDenter code hereetector detector( minHessian );
// to this
Ptr<SurfFeatureDetector> detector = SURF::create(minHessian);

//and this
SurfDescriptorExtractor extractor;
// to this
Ptr<SurfDescriptorExtractor> extractor = SURF::create();


where

int minHessian = 400;


im not sure if im instantiating it right or not. thanks in advance!

note: opencv 3.0 beta, qt, windows 8.1

 3 retagged berak 32464 ●4 ●81 ●306

### using surffeaturedetector, findHomography() to find a match

i have an image where i want to remove the center only. how can i do so?

i played around with this tutorial. at first i found a match but that was when i used 2.4. I switched over to 3.0 and even if i followed the tutorial and changed some syntax for 3.0, it doesnt find the right match.

the only things ive changed from the tutorial is

// this
SurfFeatureDenter code hereetector detector( minHessian );
// to this
Ptr<SurfFeatureDetector> detector = SURF::create(minHessian);

//and this
SurfDescriptorExtractor extractor;
// to this
Ptr<SurfDescriptorExtractor> extractor = SURF::create();


where

int minHessian = 400;


im not sure if im instantiating it right or not. thanks in advance!

note: opencv 3.0 beta, qt, windows 8.1

### using surffeaturedetector, findHomography() to find a match

i have an image where i want to remove the center only. how can i do so?

i played around with this tutorial. at first i found a match but that was when i used 2.4. I switched over to 3.0 and even if i followed the tutorial and changed some syntax for 3.0, it doesnt find the right match.

the only things ive changed from the tutorial is

// this
SurfFeatureDenter code hereetector detector( minHessian );
// to this
Ptr<SurfFeatureDetector> detector = SURF::create(minHessian);

//and this
SurfDescriptorExtractor extractor;
// to this
Ptr<SurfDescriptorExtractor> extractor = SURF::create();


where

int minHessian = 400;


im not sure if im instantiating it right or not. thanks in advance!

EDIT: So say i have an image like this

and I want to get something like this, where the lines come to a point

note: opencv 3.0 beta, qt, windows 8.1

### using surffeaturedetector, findHomography() to find a match

i have an image where i want to remove the center only. how can i do so?

i played around with this tutorial. at first i found a match but that was when i used 2.4. I switched over to 3.0 and even if i followed the tutorial and changed some syntax for 3.0, it doesnt find the right match.

the only things ive changed from the tutorial is

// this
SurfFeatureDenter code hereetector detector( minHessian );
// to this
Ptr<SurfFeatureDetector> detector = SURF::create(minHessian);

//and this
SurfDescriptorExtractor extractor;
// to this
Ptr<SurfDescriptorExtractor> extractor = SURF::create();


where

int minHessian = 400;


im not sure if im instantiating it right or not. thanks in advance!

EDIT: So say i have an image like this

and I want to get something like this, where the lines come to a point

note: opencv 3.0 beta, qt, windows 8.1