The local-features tag has no wiki summary.
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Affine detector + SIFT descriptor
I am approaching to the Oxford Buildings dataset which contains already computed SIFT descriptors from affine detected keypoint locations.
Usually SIFT detector provides to its detected keypoints ...
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3answers
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Local Image Features Extraction for Road Signs
I'm working on a project to detect a road sign from the Image. Consider the sample image below:
I'm using a heuristic search to detect the road sign within an image. Basically, I want some weak ...
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Filtering Corners Detected on Multiple Scales
I made a multi-scale Harris corner detector (inspired by MOPS) which is simply a Harris corner detector performed on several scales (i.e. subsampled versions of the same image).
This effectively make ...
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1answer
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Understanding Integration Scale in Multi-Scale Harris Corner Detector
I would like to improve a simple Harris corner detector by adding more scales.
I don't need scale-invariant interest points, just to detect more points by processing more scales.
The Wikipedia says ...
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1answer
83 views
best robust feature detectors for detecting similarities among archeological signs
I would like to implement edge detectors for creating a feature vector for archeological signs.
Which are best features, algorithms to retrieve? That could be loaded in a Support vector machine for ...
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2answers
301 views
A feature extraction method: Principal Component Analysis (PCA)
I read some articles about PCA and I think the nice way to summarize it is:
It is a way of identifying patterns in data, and expressing the data in such a way as to highlight their similarities ...
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457 views
Scale and Rotation invariant feature descriptors
Can you list some scale and rotational invariant feature descriptors for use in feature detection.
The application is for the detection of cars and humans in video captured by a UAV, using a ...
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2answers
202 views
Image Registration by Segmentation
Image registration algorithms are usually based on point features such as SIFT (Scale-Invariant Feature Transform).
I saw some references to line features, but I was wondering if it would be possible ...
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1answer
68 views
What scale should a detected SIFT point be extracted at?
I've heard this from a few different researchers but I can't find a definitive value. Given the "scale" extracted by David Lowe's SIFT detector, we need to extract a descriptor at a specific scale.
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238 views
Image Processing Prior to Feature Detection
I have implemented a feature detector based on Harris corners. It works fine most times, but there are cases where it performs poorly. I need to make it work on many different images without ...
8
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1answer
501 views
Good features / algorithms for recognizing car-models in images
I have a question concerning object recognition, especially recognizing car-models! I am at the beginning of a work about identifying the same car-model in different images. At the moment I think one ...
5
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1answer
180 views
Patent-free Interest Point Detector? [duplicate]
Possible Duplicate:
Free alternatives to SIFT/SURF for commercial use
There are same very good algorithms for interest point detection/description, like:
SIFT (Scale-Invariant Feature ...
5
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1answer
189 views
image feature extraction
We are given a set of grayscale image patches obtained from images after edge detection. Each patch is 10x10 pixels with intensity varying between 0 and 255 for each pixel. This set may contain a very ...
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1answer
391 views
Detection of circles (ellipses) in 2D point cloud
Given a set of points (2D) i.e., point cloud (PC), the question is about a robust, accurate and ...
11
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1answer
596 views
Binary robust independent elementary features (“BRIEF”) understanding
How are the descriptors in the BRIEF algorithm matched to each other?
How is the template image found in the another image? How do we compare the descriptors?
I have read that article but didn't ...
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3answers
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What are some free alternatives to SIFT/ SURF that can be used in commercial applications?
As far as I understand, both SURF and SIFT are patent protected.
Are there any alternative methods that can be used in a commercial application freely?
For more info on the patent check out:
...
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3answers
289 views
Preprocessing to improve Harris corner tracking between video frames?
In our unmanned aerial vehicle grayscale video image stabilization application, we're having difficulty finding the "good" Harris corners in frame N+1 selected from frame N. The source of the ...
