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3
votes
3answers
74 views

Low analog lowpass + ADC vs High analog lowpass + ADC + low digital lowpass

I'm doing EEG data collection and my amp forces use of an analog lowpass filter before the ADC. I'm fairly sure that I won't be interested in phenomena associated with frequencies of 30Hz or higher, ...
0
votes
1answer
96 views

DAC and sample and hold effect

I am having some trouble understanding how a digital signal gets converted back to an analog signal. Why is the "sample and hold" effect a problem?
0
votes
1answer
177 views

Frequency domain to time domain conversion-(varying sample count)

I need to convert 150 Frequency domain samples to the time domain. The problem is, I have been provided with 250 time domain samples for comparing my results. How am I supposed to relate the 150 ...
2
votes
1answer
90 views

Revert anayltic signal(length(N/2)) to real signal (length(N))

As a beginner in signal processing, i'll try to explain my problem most thoroughly. I'll firstly explain the idea of the transformation the real valued data has undergone. This includes the ideas and ...
2
votes
2answers
298 views

12 bit ADC to 8 bit DAC

A bit of background information: I plan to start experimenting with digital signal processing on microcontrollers. The particular microcontroller I plan to use (TI Stellaris LM4F230H5QR, from the ...
4
votes
1answer
42 views

Is gamma correction applied in my setup

I am working on a scientific application where I would like to evaluate luminance in an image, however I am unsure if what I receive from my setup is luminance (Y) or luma (Y'). I use a camera with a ...
1
vote
1answer
158 views

Is the mean of visible color in CIELab color space can be non visible color?

I am converting color from RGB to CIELab to train a GMM. When I get back the mean of clusters of the GMM I have sometimes negatives values in RGB space. I was wondering if the mean of only visible ...
2
votes
1answer
423 views

How to Generate False Color Palette

How to convert grayscale intensity input to something like the following image? It seems that no response (0, black) is converted to dark blue, then it goes through other colors to red. How are ...