# Tagged Questions

Algorithm is a method expressed in a finite list of steps of well-defined instructions to process a signal.

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Can anyone suggest a simple algorithm that would be able to detect when an audio track begins to fade out? The fade duration could be anything from half a second to 30 seconds, totally depending on ...
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### Algorithm to identify periodic signal spikes

I'm working with a special chip that allows me to record current draw on phones. This chip logs data with its internal timestamps. I now need to generate a unique signal that will allow me to map the ...
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### What does “kernel based” mean?

In my thesis I try to explain what kernel based methods are, especially the meaning for object detection. I know kernel based methods like Mean- and CamShift and I know how to use them. I understand ...
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### How do I identify repeated subimages within a larger image?

I have a large image of a microscopic die of an integrated circuit. The pixel dimensions are something like 15000 x 10000. Example image: The image contains a number of repeated structured ...
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### Max pooling for sparse codes from word-sequence vectors

I'm processing Geo Text dataset. Based on the dataset, I created a set of word-sequence vectors. Each sequence vector has a label which is a tuple of Geo-coordinates (latitude - longitude). Due to the ...
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### HDR Imaging - Exposure Compensation

Tried HDR Algorithms of OpenCV. Since the algorithm takes pretty much time. I tried few alternative steps as follows. Took sample images from: HDR Images 1. Divided the image into four equal regions ...
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### Artificial Neural Network Example Problem

I was looking at an example of a NN but I dont understand in the Answer i where the .68 come from or .6637 This is the link of the tutorial
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### Q matrix and updating times in a Kalman filter

The context of the problem is that I have several robots located remotely which give their position (x,y coordinates) every x seconds and send it to a centralized remote server. The value of the ...
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### Looking for an arcsin algorithm

Does anyone have a simple algorithm for computing a reasonably accurate arcsine? By "simple" I mean some sort of polynomial that requires <= 5 multiplies per output sample. And by "reasonably ...
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### Algorithm for testing input sound for multiple expected notes?

** originally I asked this question on stack exchange and was pointed to dsp.stackexchange ** I need to determine when the correct musical notes (from a piano) such as in a chord are being played. ...
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### How to generate Gray codes of n bits that have at max k ones?

I understand Gray codes have one bit change between them and how to convert between binary and gray. But given a bit length of n, I want to generate a series of Gray codes (all possible) that have one ...
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### Algorithm for detecting the time where the signal is above a threshold

I need to detect the time window where a 1D-signal is above a certain threshold. If it dips below the threshold briefly I'd like to merge the two windows, if it dips below for a longer time, split ...
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### Difference between these two digital down conversion methods

I can think of two possible methods of digital down conversion. One seems superior to the the other for most cases, but I'd like to get some DSP experts' comments on the practical differences between ...
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### Chromatography Baseline Placement

I have been looking around on Google, and I have not been able to find an explanation of how to do baseline placement in chromatography. what are some algorithms for placing a baseline on a ...
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### What does “A Target with Zero Doppler” Mean?

I have seen several references to target at zero Doppler and some simulations that command users to place a target at zero Doppler. I know that when a target is flying tangential to the signal the ...