I want to posterize an image with k-means and OpenCV in C++ interface (cv namespace) and I get weird results. I need it for reduce some noise. This is my code: #include "cv.h" #include &q...

I'm trying to use the BaselineRemoval package to remove background fluorescence from some Raman spectra. In the code documentation, it states the preferred format for the input as input_array: A pa...

I have images that are noised with some random lines like the following one: I want to apply on them some preprocessing in order to remove the unwanted noise ( the lines that distort the writing) ...

I have an image here with a table.. In the column on the right the background is filled with noise How to detect the areas with noise? I only want to apply some kind of filter on the parts with no...

On different systems (Windows/Android/etc.) there are some "built-in" audio enhancements. For example AEC (autmatic echo cancellation), NR (noise reduction) and Automatic Gain Control. Everyone can...

In my android application I need to capture the user's speech from the microphone and then pass it to the server. Currently, I use the MediaRecorder class. However, it doesn't satisfy my needs, bec...

I try to obtain the spectrum of an grayscale image using FFT Cooley–Tukey algorithm in Java. I don't know exactly how to form the input for the algorithm and what values from the output to use in o...

I've only used MATLAB as a calculator, so I'm not as well versed in the program. I hope a kind person may be able to guide me on the way since Google currently is not my friend. I have a wav file ...

I'm trying to learn how to work with audio in as many different ways as possible. Given a known audio stream (lets call it stream1) and an unknown audio stream (stream2) which are mixed into one s...

I'm trying to remove a Gaussian noise from an image. I've added the noise myself using: nImg = imnoise(img,'gaussian',0,0.01); I now need to remove the noise using my own filter, or at least red...

I'm working a somewhat ambitious project to get active noise-reduction achieved on Android with earbuds or headphones on. My objective is to record ambient noise with the android phone mic, invert...

At my work the entire engineering department just got moved into a new seating arrangement that allows sound to travel a bit more than any of us care to enjoy. I wanted to try to come up with...

I'm looking for a possibility to convert raster images to vector data using OpenCV. There I found a function cv::findContours() which seems to be a bit primitive (more probably I did not understand...

This question is related to my previous post Image Processing Algorithm in Matlab in stackoverflow, which I already got the results that I wanted to. But now I am facing another problem, and gett...

I had read in a video into Visual Studio using openCV and converted it to grayscale then used the function CV_THRESH_BINARY to convert it into a binary image. However, there are holes and noise in ...

I'm developing an iPhone 4 (iOS 4) application that show an level meter. This app measures human voice. But it has a problem. When there is a lot of noise, it doesn't work. It measures also backgr...

I came across this relatively old post which describes how impressively Nexus One's noise cancellation works and I was wondering where can I find more information about its implementation in the OS...

I want to program software for noise canceling in real time, the same way it happens in earphones with active noise canceling. Are there any open algorithms or, at least, science papers about it? A...

in a given application I apply an averaging mask to input images to reduce noise, and then a Laplacian mask to enhance small details. Anyone knows if I Would get the same results if I reverse the o...

Can anyone point me in the right direction on how I would minimize ambient noise while recording someone speaking using the iPhone SDK Core Audio? I'm guessing a band-pass filter that eliminates an...