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Questions tagged [noise-reduction]

Anything related to noise reduction techniques and tools. This tag may be employed for questions on algorithms (and corresponding implementations) used to reduce noise in digital data and signals.

Anything related to noise reduction techniques and tools. This tag may be employed for questions on algorithms (and corresponding implementations) used to reduce noise in digital data and signals.

298 questions
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Image noise reduction OCR

Hello i'm having problem with segmentation of the following picture below. It's coloured character which needs to be recognized. I'm using sharpening, wiener deblurring and wiener smoothing. After that i'm segmenting the picture with fuzzy-c means…
box
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Background noise removal from audio signals using FFT Python

I am currently doing a project at university where I am distinguishing between different instruments playing notes of the same pitch using python. I have recorded various notes on different instruments using a microphone attached to a computer. I…
Marchy
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Remove high frequency vertical shear noise from image

I have a some scanned images, where the scanner appears to have introduced a certain kind of noise that I've not encountered before. I would like to find a way to remove it automatically. The noise looks like high frequency vertical shear. In other…
Igor Khavkine
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C#/.net audio noise reduction

I'm developing a class library, that allows to do some manipulations with streamed audio (it is working with buffered samples, retrieved from recording device - so basically I've got an bytes array) for researsh purposes. The problem is that i need…
danyloid
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Python TypeError: reduce_noise() got an unexpected keyword

Hi guys I'm trying to do audio classification using python and I installed a package and when I tried to use the functions, it said TypeError: TypeError: reduce_noise() got an unexpected keyword argument 'audio_clip' hear the code of…
RED ALPHA97
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How to reduce static noise while recording audio

I'm trying to add the Noise Suppressor to an audioRecord Handler through which I'm recording the audio, the issue is that although the audio record is clear and understandable, there is still a bit of static and buzzing noise for which i'm…
ibrhm117
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NVidia RTX Voice, input a wav file instead of a microphone

I've downloaded this Ai software. I've tried it and it does a beautiful job with noise cancellation as the input should be the microphone. My question is : How can I input a wav file instead of a microphone? Anyway to use this magical noise…
Mehdi Souregi
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How to gain volumes of specific bands of audio files using ffmpeg?

I want increase or decrease volume of specific frequency bands with ffmpeg. I think bandreject and bandpass filter can do similar thing. But is there any way to reject 80% of energy of specific bands? Thanks in advance?
Ko Ohhashi
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Applying Haar Wavelet transform to time series data

I am trying to apply a Haar wavelet transform to stock market data for noise reduction, before feeding the data to a RNN (LSTM). As this data is in 1D, I'm using a single level DWT as follows: import pywt x = [3, 7, 1, 1, -2, 5, 4, 6,…
Adeel Hashmi
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google app engine python log level noise reduction

Does anyone know how to reduce the verbosity of logging output from dev_appserver.py? The noise level of these logs is just driving me crazy. I know how to do this kind of config in Java with log4j, but am really lost here on google app engine…
jpswain
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Noise removal to create mask in OpenCV

I need to create a mask to retrieve an object (foreground object) based on two related images. Image 1: [![enter image description here] Image 2: [![enter image description here] The images contain a foreground object and a background with…
Putra
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scipy.signal.wiener always show warning

I'm trying to use the wiener denoise function from Scipy in a grayscale image: image = data.imread(image_path, as_grey=True) image = signal.wiener(image) but I always get this…
rriccilopes
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Noise reduction before pocketsphinx reduces recognition accuracy

I am trying to improve the recognition accuracy of pocketsphinx in noisy environments. However the user might use the app in a variable environment. Hence training with noise is not something that I want to do. My question is , would noise reduction…
neeraj baji
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Feature detection on a small, noisy image with OpenCV

I have an image that is both pretty noisy, small (the relevant portion is 381 × 314) and the features are very subtle. The source image and the cropped relevant area are here as well: https://i.stack.imgur.com/mVLFx.jpg The task is to count the…
PFlans
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MediaRecorder.AudioSource.VOICE_RECOGNITION is available or not

I'm working on a project in which I have to use an Android Development Board, just like following, to record audio via MIC, specifically speech. PandaBoard BeagleBone Black AM335x Evaluation Module For my audio, from MIC, I want it to be filtered…
Bilal Rabbani
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