Signal Processing Stack Exchange
Signal Processing Stack Exchange

Questions tagged [conversion]

44 questions
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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 TOSH IK CU51 (PAL) control unit which is…
Amelse Etomer
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3 answers

Going from digital to analog filters

I've been learning about digital signal processing for some time, and I understand the principles in the digital world, as well as the conversion of continuous filters in the s-domain to digital filters in the z-domain. I'd love to learn more about…
Casper B. Hansen
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How to choose the most appropriate color space for a computer vision application?

A lot of image processing techniques used in computer vision consist (among other things) in switching from RGB to another color space (HSV, YUV, LMS...) : color transfer, visual tracking... It seems that different people use different color spaces…
S.E.K.
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3 answers

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, so it strikes me that the most disk-space…
Mike Lawrence
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4 answers

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 these colors derived? Is there any standard…
Libor
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Conversion into the Q31 Format

I have a Setup, where I receive 24-bit ADC samples in the two's complement in 8-bit chunks. Usually I just "converted" them into a signed 32-bit integer like this: sample=((byte1<<24)|(byte2<<16)|(byte3<<8))>>8; Now, for educational purposes I moved…
Chuchaki
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Convert sine wave signal to square wave signal

I have a signal containing a variation of digital ASK type on-off keyed sine wave among which some stochastic irrelevant harmonic waves occur, like you can see on this figure: In its current form each pulse duration is the same, but it's not always…
Athius
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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 Stellaris Launchpad) has a 12 bit ADC integrated on…
AndrejaKo
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inverse Fixed point number (number^-1)

Could someone please provide a method for inverting random fixed point numbers. I have as an input both positive and negative floating point numbers that should be converted into fixed point and then be inverted. An example could be 1/0.2453 where…
Rizias
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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 reasons why it does work and the way to revert…
Marcel
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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 color can be non visible color ? Therefore I was…
Seltymar
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Does the convergence rate never increase of a Stationary Ergodic Random Processes under downsampling?

Summarize the problem Given A Stationary Random Processes (strict sense) $X_i$ I define two Stationary Ergodic Random Processes by $$ \bar{X}_n = \frac{1}{n} \sum_{i=0}^{n-1} X_i \ \ \text{and} \ \ \bar{Y}_n = \frac{1}{n/\delta}…
Gerben Beintema
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Usefulness of Matched $z$ transform Method

I'm aware that the matched $z$ transform method maps between the continuous $s$ plane and the discrete/digital $z$ plane but my question is - when would this be necessary? Why would we need to convert between the two? Thanks
Janitt
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Why is the green colour not represented as black in Cr component of YCbCr?

I am testing conversion from RGB to YCbCr in Python's pillow imaging module (formerly PIL), and am getting predictable results overall, except for green, as represented in the Cr channel component of the YCbCr version of image. For blue, I get white…
Theo d'Or
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Conversion from Floating point representation to Fixed point representation

I have written a matlab function for a constellation mapper and I want to create a Fixed-point version of that code for implementation on FPGA. I know matlab has a specific toolbox for fixed-point conversion but i want to do this manually. My…
Mohamed
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