C# is a programming language from Microsoft for .NET/CLR

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Using Fourier Transform on Gyroscope

The original idea is to calculate distance from accelerometer input. However, accelerometer reading also contains the gravitational values, thus to remove gravity, I tried using Gyroscope. The idea ...
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96 views

Image Registration C#

I'm trying to fuse different images of the same scene which each image have a different focus. I've been told that first I have to perform an image registration to the images. Right now, the result ...
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76 views

How to get the depth value of a ball from a disparity map

Hi I am writing a program which retrieves the z coordinates of a ball from a disparity map. I am using the EmguCv wrapper class. At present I have a lot of elements working although admittedly not ...
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34 views

using frequency of image to update it

I am using c# in a desktop application. If the image - which comes from an ip camera changes from the previous frame then I upload the image in bytes to my web server. I have found some images are ...
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2answers
262 views

Options to enhance a poor image

I have a C# desktop application. I am using EMGU as a wrapper for OpenCV. I am receiving images in JPEG format that were originally taken by an analogue camera. The quality of the image is poor ...
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1answer
147 views

Entropy/frequency of a natural image

I have a C# desktop application. I am using a wrapper to OpenCV which is EMGU. I am just performing a basic motion detection operation. I am using component labelling and 2 frames differencing to ...
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0answers
52 views

reducing chroma of image on client and reconstructing on server

I have a C# desktop application. I am using Emgu wrapper to openCV. My objective is to upload images in the most efficient way I can. I have hit upon the idea of loading an image (jpeg) into memory ...
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1answer
139 views

Entropy of an image

If I want to measure entropy of an image how should I do it? My aim is to ignore things like tree leaves moving in the wind with my C# desktop application. I know matlab has this functionality but I ...
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286 views

Sharpening an image using emgu

I have c# desktop application and I am using emgu framework as a wrapper for OpenCV. I am trying to sharpen an image because the input images are not great. I tired a technique I found via searches ...
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2answers
440 views

Improve contrast when image has a flood of white balancing

I have an image taken a night time. I apply _EqualizeHist to it. But the result is a high level of whiteness running through the image. This is the image: I had asked this question in a slightly ...
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0answers
63 views

motion detection within a poor contrast image

I have a C# desktop application. Its purpose is to detect motion changes between consecutive frames. Currently I am using the excellent Emgu wrapper to OpenCV. Now, I know this question may seem ...
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54 views

Intersecting ellipses recognition in image C#

For a research project, I have to find the ellipses in a fossil image. For each fossil image, I also have a CSV file containing the contour of the fossil, in cartesian coordinates. I need help in ...
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1answer
133 views

Getting the average pitch of a wave in C#

I want to separate out the components that I need to evaluate the pronunciation of a user, so I am dealing with the energy/stress/volume and intonation or pitch. Focusing first on the pitch, is ...
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1answer
113 views

PID With Prediction

First, I just want to start off by saying that I am a programmer, and am no expert in complex algorithms, and will probably not be able to apply complex pseudo-code or other descriptions of a ...
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2answers
1k views

Remove background from image

I want to remove the background from image. Let's say I have this background: . Then I put pen drive and tippex on it. . Is it possible to remove the background image from second image? If so, ...
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2answers
95 views

processing 16bit audio files [closed]

I currently have a 16bit mono file. I would like to read this data to retrieve only the data chunk part and not the entire file with the headers so that I can apply fft on it. I tried finding ...
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1answer
1k views

comparing 2 audio files in c#

I have 2 audio .wav files recorded by the the same person with the same word. Each audio file has a format of 16bit, 44.1kHz and is a mono channel. I would like to know how to compare these 2 audio ...
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1answer
589 views

Applying FFT to PCM stream

I would like to use a .WAV file and convert it into a spectogram. Any idea how to do this with Naudio? Basically the flow should be like this, I think: Convert WAV file to PCM stream Convert PCM ...
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1answer
99 views

Detect when someone has stopped talking

What's an extremely efficient way of detecting when a user has stopped talking into a microphone? When I use systems like Siri it can detect when I've stopped talking almost immediately, even when ...
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2answers
427 views

Object Recognition

I need help to develop an object recognition system. It needs to identify an object in an image by comparing it with an image in an existing database. For example my database may consist of images of ...
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1answer
82 views

What could an algorithm look like that iterates through all combinations of two variables to aim at a certain number of entries? [closed]

For background information, see "Some background" further down. I have a list that looks like this: Start-Time-In-Seconds;End-Time-In-Seconds 1;2 4;6 12;15 ... ...
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3answers
4k views

How to resample audio using FFT or DFT

I'm down sampling voice audio by first performing an FFT, then only taking the parts of the result that I need, and then performing an inverse FFT. However, it's only working properly when I'm using ...
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0answers
259 views

Get bit stream from known radio frequency

I'm a beginner in radio demodulation, and several days can't solve my problem. The problem is to get bit stream from known frequency. I made I C# application that gets the data in real time from ...
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3answers
1k views

Image Processing: How to detect a quadrialteral signboard in image?

How can I detect a quadrilateral signboard from an image captured using a mobile phone? How can i detect shapes like rectangle? rounded rectangle (rounded corners instead of shape corners)? I am ...
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3answers
5k views

How do I compare 2 audio files, returning a percentage of difference

Is there a way to compare 2 audio files, whereby a percentage of difference will be returned? I am using C# VS08, .net framework 3.5. Edited: difference in the sound (like for eg. Audio 1: ...