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Questions tagged [segmentation]

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0
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1answer
30 views

How to extract a smooth contour from a set of points in 3D?

I am trying to segment a 3D volume. The outcome of all my volume segmentation algorithms is a set of candidate points in 3D space. Now I need to smooth this point cloud and fit a closed surface it. My ...
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0answers
31 views

How to use a context window to segment a whole log Mel-spectrogram (ensuring the same number of segments for all the audios)?

I have several audios with different duration. So I don't know how to ensure the same number N of segments of the audio. I'm trying to implement an existing paper, so it's said that first a Log Mel-...
0
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1answer
41 views

How does reconstruction function relate to watershed segmentation?

I'm trying to understand how watershed work by reading The Morphological Approach to Segmentation: The Watershed Transformation S. Beucher and F. Meyer This document mentions the reconstruction ...
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0answers
112 views

Discontinuities in digital down conversion (frequency translation and LPF) of a continuous data stream in Python?

I have to process large data files containing a BPSK, biphase-L encoded signal with 72 kHz carrier frequency (expected), 18 kHz baud rate. The sampling rate (fs) is 648 kHz, chosen to be an integer ...
2
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1answer
80 views

Is deep learning the only way to detect humans in a picture?

I'm looking for a way to detect humans in a picture. For instance, regarding the picture below, I'd like to coarsely determine how many people are in the scene. I must be able to detect both standing ...
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0answers
25 views

For extracting the characteristics of the signal what minimum duration should be considered?

Being non signal processing student I have a limited understanding of concepts. I have a continuous periodic bearing faulty signal of 10 seconds duration sampled at 12 kHz. So I have 120,000 ...
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0answers
161 views

Machine learning to find an optimal set of parameters for a segmentation algorithm

Using machine learning to find an optimal set of parameters for a given segmentation algorithm. In the "classical" case of machine learning, in the training phase, the data set is constant and the ...
1
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1answer
81 views

How to compute number of samples in 1 cycle of signal?

I have 3 signal sampled at 12 KHz frequency obtained from a motor rotating at constant 2000, 2020, and 2040 rpm. For 1 second signal recording I have 12,000 time samples. Depending on the frequency I ...
0
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1answer
83 views

Kullback-Leibler Distance of Spectral Data

I am currently reading through Music Structure and Analysis from Acoustic Signals and am having some difficulty in understanding how the modified Kullback-Leibler distance is calculated. (I am just ...
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0answers
66 views

Help Understanding Radial Gaussian Filter

I am currently reading through Mueller's "Fundamentals of Music Processing" and I am trying to understand audio segmentation through the use of self-similarity matrices. Currently, my matrix looks ...
0
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1answer
1k views

How to segment frequency bands after FFT and calculate power?

I have been working with EEG signal. I have raw EEG data for a 2-second (i.e. $t=2$) duration. My objectives are: Transforming these raw data from time domain to frequency domain. Segmentation into ...
0
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1answer
62 views

Number segmentation techniques

Assume that the speed limit at a place is captured and is provided as an input to a system which checks if the speed of vehicle is above the accepted level or not. For checking, the number in the ...
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2answers
724 views

segmenting an EEG data

I have an EEG labeled data, which is the data that used for training, And I want to segment those data based on the time of EEG signal (Time-based Epoching) as a preprocessing step, based on the ...
1
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1answer
490 views

How to segment object when it has similar histogram with background

I am working in image segmentation and I would like to ask you something about my problem. I have a image such as bellow. I want to segment leopard from background. However, intensity information is ...
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2answers
336 views

Image Segmentation - Berkeley Dataset

I've been given an image from Berkeley dataset to segmentate. I am an undergrad student and so far I threw everything i know to this thing. But the colors are extremely close. I tried; Clustering ...
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0answers
2k views

how to get segmented OPTIC DISC from retinal image?

i have been segmented some image of retina. but the result is not good as i hope. for one image i can get good segmentation, like this image my code is from some reference in internet, in below i ...
0
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1answer
60 views

Segmenting a sound file before each of its attacks

Like the title says... I want to split audio file where a single instrument is played (not so fast)... I just need to detect the attack phase of the waveform to know where a played note begins. Can ...
4
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1answer
2k views

Segmentation and Labeling of White Blood Cells

I am trying to segment and label white blood cells from this image: Using K-Means I managed to segment most of what I wanted: But as you can see, there are some cells connected to each other which I ...
1
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1answer
79 views

What are the Segmentation algorithms that can be used to process Satellite images (obtained from Google Earth) to segment forest and barren areas?

I have tried Region based Segmentation - through Seed Growing, Watershed algorithm, and Graphcut algorithm, but none have been successful so far. I am using MATLAB.
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0answers
427 views

Segmentation based on peak values

I have a 2D array/matrix (something like an image, but it's not an actual image) with values from 0 to X (in this case 180). and I have a 1D array/Vector that has the occurrence frequency of these ...
1
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1answer
346 views

Speech / Audio Separation

I'm looking for a way to implement a Speech Separation from a .wav file. Let's say I have a .wav signal containing the following words: "The cat flew away" Now I ...
2
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1answer
290 views

Speech segmentation for speaker recognition

I'm trying to implement a speaker recognition system and want to make sure I'm aware of the latest trends in speech segmentation. I've read a number of very different methods at a higher level but I'm ...
3
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0answers
74 views

Perceptually Corresponding Error Map

Is there any better measurement of error between two images than just taking pixel value differences? The problem I am tackling is stitching images containing "sensitive" objects, such as moving ...
7
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1answer
5k views

How do I evaluate the performance of a segmentation algorithm?

I'm currently on a project of liver tumor segmentation. I segmented the liver using region growing, and I have to assess how accurate the result is. I recently learnt that there are certain metrics ...
6
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1answer
1k views

What segmentation methods can be used for simple images?

As related to the project I am currently involved in, I have come to realize that one thing that might help is for me to 'segment' my image. To that end, I have shown a very simple example below. ...