# Tag Info

### Signal and Space/Time

You probably have a small misunderstanding here. In the definition it is not said "time" and "space" but "time" or "space". Some signals vary with time, as your ...
• 1,976
Accepted

### What's the point of differential beamforming?

Introduction To my (rather limited) knowledge, the main advantage that made Differential Microphone Arrays (DMA) popular is their ability to have a frequency invariant beampattern (up to some certain ...
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• 90.5k
1 vote

### What is the meaning of spectral contamination in image processing?

"Spectral contamination" is used for designating a few phenomena connected with spectral analysis in optics, acoustics, analytical chemistry. I have never heard of these words to be used in ...
• 1,739
1 vote
Accepted

### How to detect the presence one- and two-dimensional patterns in distributions of spatial points?

Perhaps you could perform blob detection to find the individual dots and then map their location to a 2d space, that preserves their spatial structure, through the use of some measure for example the ...
• 247
1 vote
Accepted

• 10.7k
1 vote

Try this ...
• 45.6k
1 vote

### Are there accepted ranges of "high", "medium" and "low" visual spatial frequency?

The short answer is yes(1), no(2). The quantification of the power spectrum is performed via the Fourier Transform over an image. An image is a matrix that describes the distribution of reflectance (...
• 10.7k
1 vote
Accepted

### How to find PSD (Power spectral density) of spatial data

A spectrum estimation method that works well in many cases is Welch's method. The MATLAB implementation is pretty straight forward to use, even when not knowing about the math behind it. Following ...
• 1,035
1 vote

### IFFT of Microphone Array Directivity Response

Your plot shows the magnitude of the array gain vs angle of arrival for the broadside beampattern. Before you can take meaning IFFT of this sequence, you need to follow the following steps. The data ...
• 126

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