Questions tagged [feature-detection]
The feature-detection tag has no usage guidance.
10
questions
1
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1answer
35 views
Palmprint Identification - Why do we align the images before we use the Fourier Transform?
I was reading the paper PALMPRINT IDENTIFICATION BY FOURIER TRANSFORM by WENXIN LI, DAVID ZHANG and ZHUOQUN XU about identifying persons based on an image of their palm.
The first step in their ...
0
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0answers
18 views
Finding the differences(using features, not subtraction) in order to find differences in signals
I have a question. Let’s say I have two signals (discretely represented as arrays), $S_1$ and $S_2$ as shown below. $S_1$ has a similar form to $S_2$. If the signals are subtracted, $S_2-S_1$, they ...
1
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0answers
23 views
KLT tracker, reject tracked occluded points
I want to use KLT tracker for a visual odometry application. Thus, I only want to track object features. Currently I'm using OpenCV's implementation ...
0
votes
1answer
22 views
What are the ranges of values for each audio feature/descriptor?
I need to normalize some audio feature measurements I've done with the software Wolfram Mathematica.
Coming from a non signal processing background, I have some difficulties understanding what ...
1
vote
0answers
30 views
Is there any way to do 3D (Voxel Data) feature detection?
In the 2D image processing, there are ways to find and match features of the image (like corner of the edges). However, I could not find the equivalent of that in the 3D-voxel data (Here voxel means a ...
1
vote
2answers
285 views
Scratch Detection On Noisy Textured Surface
I wish to extract long thin scratches from the noisy background image.I have tried several ways such as stacking smoothed image with input image to remove some of the noisy background patch before ...
0
votes
1answer
61 views
How to make series circle shift invariant
I have a series of numbers. They may be integer, floating, or ...
2
votes
2answers
451 views
How to extract features of individual spikes in non-negative signal?
I have data of non-negative (in the sense there's no signal below baseline) spiking waveforms, which are in the form of a 1D array of numbers:
Spikes that cross some threshold are considered real ...
1
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0answers
45 views
Texture detection
I am looking for good methods, preferably parameterless, to detect textured areas in an image. I mean random textures, not regular patterns. The final goal is to discriminate between significant edges ...
3
votes
2answers
4k views
ORB Algorithm: What Is Intensity Centroid?
So, I am reading a paper about ORB: An Efficient Alternative to SIFT or SURF and it happens to calculate the direction of corner from it center . According to Rosin the author of the paper;moments of ...
