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Questions tagged [freak]

Fast Retina Keypoint is a keypoint descriptor based on human retina visual system.

A cascade of binary strings is computed by efficiently comparing image intensities over a retinal sampling pattern.

It is a competitive solution compared to other descriptors like SIFT or SURF.

Reference:

FREAK: Fast Retina Keypoint

Alexandre Alahi, Raphael Ortiz, Pierre Vandergheynst

Ecole Polytechnique Fed´ erale de Lausanne (EPFL), Switzerland

22 questions
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How to use FREAK as part of BOW

I've some code running that performs object categorization using the BOW-frame provided by OpenCV. And as long as I use SIFT or SURF as DescriptorExtractor everything is fine. Now I want to use FREAK as DescriptorExtractor. As my first step I…
Kastor
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Features detection with ARToolKit?

I'm using ARToolKit in an android app and i would like to do a features detection (probably with FREAK because now ARToolKit uses it) in an image. My goal is just to have the number of key points in the image. But I don't find the tools to do just…
Bruno G
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Bruteforcematcher with FREAK extractor gives zero matches

Hello guys hope you are doing well. I am implementing a system that can detect object from given image frame in opencv 2.4.8. Currently I am dealing with FREAK algorithm because it is free. So as mentioned in tutorials and opencv docs I created…
d91
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Freak Descriptor Row type

I have the following code: //newImg is a mat of an image and orderedKeyPoint is the result from Fast cv::FREAK extractor; cv::Mat queryDescriptors; extractor.compute(newImg, orderedKeyPoint, queryDescriptors); I am trying to access individual freak…
Isaac
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Best way of matching FREAK descriptors?

So I'm making an application with the use of FAST detectors and FREAK descriptors. When it comes to the matching I wanted to use the BRUTEFORCE_HAMMING matching, but I don't get the expected results (gives more matches with images that have nothing…
user1393500
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error while using FREAK

I'm trying to create Descriptor extractor using FREAK. but at the following line: freakExtractor = cv2.DescriptorExtractor_create('FREAK') I get an error saying: freakExtractor = cv2.DescriptorExtractor_create('FREAK') AttributeError: 'module'…
md1hunox
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How is defined the Freak descriptor pattern

I'm have to code my own implementation of FREAK descriptor for a homework. I actually read the original paper but there isn't any explanation of how the build the pattern used. In the OpenCV code is defined the buildPattern() function but it also…
user1896216
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