Signal Processing Stack Exchange
Signal Processing Stack Exchange

Questions tagged [segmentation]

34 questions
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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 for assessing the accuracy of the region growing…
Gomathi
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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. How do segmentation methods work in general, and…
Spacey
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Extracting audio segments based on detected onsets using libROSA

I have a couple of .wav sound files with very similar percussive signals of ~60ms duration. I can identify their onset times using libROSA's onset detection quite well. I would now like to extract the associated audio segments of ~60ms from the…
VGF
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Modern Method for 1D Signal Segmentation

I want to segment a signal in an unsupervised manner. The data is a 1D signal which has different segments which I want to be able to segment automatically for farther processing. I am looking for a fast and efficient algorithm. The motivation is…
Thomas
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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 would like to label as separate objects. So my…
user3148616
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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 people. Here are two images I would like to blend: I…
Libor
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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 and sitting people. I do not mind not detecting…
avazula
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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 not sure which one would be best for my…
wheresmycookie
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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 good, and I am trying to understand the use of a…
SFX
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Signal segmentation into states ( Stop/mov)

My question concerns signal segmentation. My signal is the green one, which represents the distance from the first point to the rest of points. I would like to cut the trajectory into segments that each represents the current status of the person,…
Mouna
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Comparison of results own implementation and python signal.welch

I am trying to replicate the output of Python's signal.welch function to make an estimate of the PSD from an FFT calculation. I don't want to use the built-in function to understand better what is happening, plus it gives me some illusion of more…
WhyCFD
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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 discrete time samples in 10 sec signal. I have utilized…
Raady
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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 can say (1/f) is the time period of oscillation.…
Raady
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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 not useful for my case because the bough…
John
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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 Edge Detection Histogram Thresholding I need…
Mert Çelikok
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