i want some help ...
i want to implement motion estimation.....in video compression so how
to start and what kind of tools will be helpful to me???
and i am studying about three step search and etc....
any body having code for it???
Dhruv <email@example.com> writes:
> hi friends
> i want some help ...
> i want to implement motion estimation.....in video compression so how
> to start and what kind of tools will be helpful to me???
> and i am studying about three step search and etc....
> any body having code for it???
Find some open source H...dsp+matlab
thats your kindness
we want to draw a shape such az circle with external device that
connect to computer by parallel or serail port
The only thing that we need is process of shape by matlab & send out of
<firstname.lastname@example.org> wrote in message
> thats your kindness
> we want to draw a shape such az circle with external device that
> connect to computer by parallel or serail port
> The only thing that we need is process of shape by matlab & send out of
> edge position
You will have to be more specific to get good responses.
The "external device" could be a lot of things.
I will assume that it is an x-y device such as a mouse with a crosshair
attached to it - so you only need to interpret what the mouse is doing in x
and in y - the same as is done with any number of computer programs.
Next step: how to get from serial mouse to Matlab?
Perhaps a simple mouse position-reading program in C/C++ that interfaces to
That might get rid of any low-level serial port reading requirements.
Shape and edge position are two different things, aren't they?
Did you have some processing or processing requirement specifically in mind?
Does this have to be in real time or might some interim program do a good
part of the job for you?
...Parameter estimation in Matlab?
I have the following formula representing a physical system:
a = K1*arctg[K2*(w1-K3*w2)/(w1+K3*w2)]
Known constants ===> w2
Unknown constants ===> K1, K2, K3
That is, "w1" input generate "a" output.
Through experimentation I have a table ("w1","a").
Is there any command in matlab to find the parameters K1, K2, K3 using this table ("w1","a") ??
Thank You so much!!!
On 10/12/2013 11:52 AM, Christiano wrote:
> I have the following formula representing a physical system:
> a = K1*arctg[K2*(w1-K3*w2)/(w1+K3*w2)]
> Known constants ===> w2
> Unknown constants ===> K1, K2, K3
> That is, "w1" input generate "a" output.
> Through experimentation I have a table ("w1","a").
> Is there any command in matlab to find the parameters K1, K2, K3
> using this table ("w1","a") ??
Whassup w/ this thing of everybody calling data arrays and vectors
What's arctg? arctan() maybe???
Em s=E1bado, 12 de outubro de 2013 21h36min38s UTC-3, dpb escreveu:
> On 10/12/2013 11:52 AM, Christiano wrote:
> > Hi,
> > I have the following formula representing a physical system:
> > a =3D K1*arctg[K2*(w1-K3*w2)/(w1+K3*w2)]
> > Known constants =3D=3D=3D>...Motion intensity estimation
I'm trying to estimate motion intensity of a database of mpeg video streams. I need to extract the motion vectors from all the videos and then use them to estimate the motion intensity. Is there a way to directly extract the motion vectors from the MPEG stream? Any thoughts or code would be appreciated.
...Maximum Likelihood Estimation in MATLAB
I desperately need to estimate in MATLAB the parameters of a simple
regression model via maximum likelihood estimation. Can anyone help
me please? It also would be great if you provided a simple
I have spatial econometrics toolbox from Prof. Lesage. I know how to
run basic OLS.
But I need MLE estimation of the parameters of a linear regression
model. Suppose I have Y column vector and X matrix, what do I do
next? Do I have to first define likelihood function somehow? Thanks!
> I desperately need to estimate in MATLAB the parameters of a simple
&...MATLAB code for DOA Estimation
Am new to MATLAB. Does anyone have sample code for Direction of
Arrival Estimation using the Delay and Sum Beamformer?
...Matlab to simulink to TI DSP
We have developed a Wimax 802.16e model using Matlab
floating point implementation.
Now we need to move this model to simulink model and use
real time workbench to implement it on TI DSP.
Is it possible? What's the limitations ?
...Half pixel motion estimation
i am posting my code about the implementation of 4 step search algorithm. i implement it in integer pixel accuracy and it seems to work fine. But when i try to implement at half pixel accuracy and resize the images and add the lines that you will notice if you scroll at the bottom, it seems to get weird results and consumes much time..please help me
function [vectorsx vectorsy calcs] = fourstepsKK(anchor, reference, blocksize)
reference0 = reference;
anchor0 = anchor;
reference = imresize(reference, 2, 'bilinear');
anchor = imresize(anchor, 2, 'bilinear');
%gnostopoio tis grammes kai tis sthles tou reference frame
[grammes stiles] = size(reference);
[grammes1 stiles1] = size(reference0);
%arxikopoio ton pinaka ton motion vectors
vectorsx = zeros( ceil(grammes/blocksize), ceil(stiles/blocksize));
vectorsy = zeros( ceil(grammes/blocksize), ceil(stiles/blocksize));
halfx = zeros( ceil(grammes/blocksize), ceil(stiles/blocksize));
halfy = zeros( ceil(grammes/blocksize), ceil(stiles/blocksize));
temp = 1;
count = 0;
%ksekiname apo pano aristera opos ston ebma
for i = 1 : blocksize : grammes-blocksize+1;
% for i=12*blocksize+1:12*blocksize+1
for j = 1 : blocksize : stiles-blocksize+1 ;
% for j=0*blocksize+1:0*blocksize+1
min_MAD = 256*grammes*stiles;
x = j; %kratao tis sintetagmenes gia to block pou eimai tora
y = i; %gia na ...Question about DSP in Matlab (beginner)
I'm starting to learn DSP (Matlab )and I have two questions about it,
maybe someone can help me out?
I'm trying to measure a frequency from an Audio Device and I'm using FFT
to transform it from the time domain to the frequency domain. But I am
doing a downsample before the FFT. But you can also do it after the FFT.
Do you know what would be the most efficient (before or after)? And why?
Another question, I am using zero padding to increase my system resolution
(up to 50Hz). My frame length is N=256 and sample frequency fs= 44100 Hz.
So 44100/50 = 882, so I need to add 626 zeroes (to 256 frame length) to
get 50 Hz resolution, I hope this is correct? I believe this is done for
FFT. But is this the same for the DFT?
Thank you and regards,
Posted through http://www.DSPRelated.com
>I'm starting to learn DSP (Matlab )and I have two questions about it,
>maybe someone can help me out?
>I'm trying to measure a frequency from an Audio Device and I'm using FFT
>to transform it from the time domain to the frequency domain. But I am
>doing a downsample before the FFT. But you can also do it after the FFT.
>Do you know what would be the most efficient (before or after)? And
>Another question, I am using zero padding to increase my system
>(up to 50Hz). My frame length is N%6 and sample frequency fs= 44100
>...Cyclic Spectral Estimation (Matlab)
Cyclostationarity is a common property of man-made digital signals tha
has a vast number of uses in digital communications
To make use of cyclostationarity it is necessary to estimate the Cycli
Cross Autocorrelation or the Cyclic Cross Spectrum of the receive
In a simulation how do I estimate these two values?? I have searched
lot of forums, boards and mailing lists and I am unable to find a Matla
code to estimate the Cyclic Cross Autocorrelation nor the Cyclic Cros
Spectrum of noisy signal vectors.
I have read some papers by Gardner and Giannikis but they are heavy i
maths, that I am not good at, and no pseudo algorithm is presented to hel
me implement it in Matlab.
Maybe obtaining these estimates is so trivial that is considered commo
knowledge or it is so hard to do that everybody is avoiding it??
If anyone knows of a function/program (Matlab ) to estimate the Cycli
Cross Spectrum and Cyclic Cross Spectra of two modulated signals with AWG
noise please let me know..
Do you know a company who employs DSP engineers?
Is it already listed at http://dsprelated.com/employers.php ?
On May 25, 3:37 am, "ryujin_ssdt" <hsan...@gmail.com> wrote:
> Cyclostationarity is a common property of man-made digital signals that
> has a vast number of uses in digital communications:http://spincom.ece.umn.edu/papers04/bib05eurasip.pdf
&g...RTDX Matlab with DSP/BIOS
I have a problem while using RTDX to exchange data between target DSK671
and host MATLAB. The problem is the following! When I am running th
examples given by mathworks for comunications between the dsk and matla
they run with no problem.
But the thing is that the examples don't use the dsp/bios, rather the us
their configuration files, and I would like to use the dsp/bio
When I am using the dsp/bios for the configuration I always receive a
timeout from the matlab everytime I want to read a msg. And I already los
some time to solve this problem, but the timeout is always appearing..
Can any one help me out solving this problem of initialize rtdx th
dsk6713 using the dsp/bios, for comunications with matlab?
This message was sent using the Comp.DSP web interface o
...Wavelet-Based Motion Estimation
I hope help how can use wavelet-based motion estimation technique for
dense flow tracking in order to include
information of the entire range of facial motion. Flow-based
principal component analysis
is presented to compress the high-dimensional dense flows to a
vector for each frame in a video sequence, which is encoded for
recognition processes and
expression intensity estimation
...variable block motion estimation
hi there...i need help on how to do variable block based motion estimation for an existing algorithm. the existing algorithm is in fixed block based. i want to implement variable block based. please do help me..thanks
...Matlab DSP jobs for graduates
Hi people.First of all I want to thank you all for your contribution
to this newsgroup.I found it very useful during my university
education and hope to use it post graduation.
I have been programming in Matlab for the past 2 years and I am
looking for a job that involves Matlab DSP and algorithm
development.A search on google doesnt give much results so your help
will be appreciated.If you know any agencies that specialise in
Matlab jobs in UK then please share with me.
> Hi people.First of all I want to thank you all for your contribution
> to this newsgr...estimating motion in pixels/frame
i have a sequence of images which represent moving text and
my project requires me to estimate the motion in pixels per
frame. Can anybody help me out with this.
"naveen " <email@example.com> wrote in message
> i have a sequence of images which represent moving text
> my project requires me to estimate the motion in pixels
> frame. Can anybody help me out with this.
Apply correlation between your frames, and the position of
the peaks will give you a direct measure of the distance
moved in ...motion estimation and compensation in the transform domain
I am doing my project on interpolation of lost frames of video
using motion tracking.In spatial domain using block matching
algorithms i have founded motion vectors but i am not getting how to
do motion estimation and compensation in the transform domain(DCT Of
an image).if anybody of u knows then plz do tell me.
...Question for maximum likelihood estimation in matlab
I am relatively new to matlab and I came up with a project that I have 39 numbers and I have to find their distribution. I performed a liliefors test and I found that the distribution is not Gaussian. From an example in bibliography I know that the specific data if it isn't Gaussian it would be gamma so I did the following :
[phat, pci] = mle(X,'distribution','gamma');
but there are negative numbers included in these 39 numbers and it can't be gamma with negative numbers.How can I possibly found which is the right distribution?Is it right to use abs(...motion compensated frame interpolation in matlab
Does anyone know if there exists any motion compensated frame interpolation scripts in Matlab? I was hoping to increase the framerate of a video I'm creating in Matlab, and at the moment I'm just using a crossfade between frames. It works, but it's not ideal.
I know that MCFI exists in a lot of video editing technology out there yet I can't seem to find any examples of working Matlab code. Any one know of a working library or sample code?
...How to make a Maximum Likelihood estimation in matlab
I would like to have MLE in Matlab.
Could you please help me by specifing a good starting point?
I would like to thank you in advance for your help
"Alex " <firstname.lastname@example.org> wrote in message <email@example.com>...
> Dear all,
> I would like to have MLE in Matlab.
> Could you please help me by specifing a good starting point?
> I would like to thank you in advance for your help
> Best Regards
If you understand what MLE is and does you can implement the algorithm yourself.
You c...Regarding Bub pixel motion estimation
I am new to this group . I am working on H.264 codec. I need to know
how to perform
sub pixel motion estimation in detail. Also i need to know whether sub
pixel motion estimation will achieve good compression without any
Thanls and regards,
...2SLS or IV estimation using matlab
I am new to matlab and have a question and hope someone on this list
can help me out. Is there a function that'll allow me to do 2SLS or
Instrumental Variable estimation in matlab?
I tried to do this manually in the following manner
My variables are y x1 x2 x3 and x1 is potentially correlated with the
unobserved error term. I have an instrument z1. I ran a 2 stage sls in
the following manner
[B1 BINT R1 RINT STATS]=regress(x1,DVmatstage1)
DVmatstage2=[zeros(n,1) z1pred x2 x3]
[B2 BINT2 R2 RINT2 STATS2]=regress(y1,DVmatstage2)
Ho...Re: matlab code for motion compensation
Hi this is bhanu
send me matlab code of motion compensation & prediction part of the
video encoding using the standard H.261
...dsp simulation problem using matlab
i hope this the right forum for this type of questions:
please i really need help in solving this problem:
A random process is defined by x(t) =3D A cos(2*pi*f0*t+=CE=A6), 0=E2=89=A6=
t=E2=89=A7T, where A and f0 are constants and =CE=A6 is uniformly distribut=
ed random variable in the range -pi=E2=89=A6=CE=A6=E2=89=A7pi . Generate sa=
mples (at the rate fs=3D80kHz ) over a time interval of length T. Choose th=
e signal length T so that you get about 900 to 1000 samples of the simulate=
d analog signal x(t).
i)Plot the time signal with the function plot so that the samples are conne=
cted. Make sure that you label the time axis of the simulated analog signal=
ii)Find the autocorrelation of the signal and plot it.
iii)Find the Fourier transform of the autocorrelation and plot it.
On Thu, 04 Oct 2012 09:44:26 -0700, Jamal Alkit wrote:
> hi ,
> i hope this the right forum for this type of questions: please i really
> need help in solving this problem:
> A random process is defined by x(t) = A cos(2*pi*f0*t+Φ), 0≦t≧T, where A
> and f0 are constants and Φ is uniformly distributed random variable in
> the range -pi≦Φ≧pi . Generate samples (at the rate fs=80kHz ) over a
> time interval of length T. Choose the signal length T so that you get
> about 900 to 1000 samples of the simulated analog signal x(t).
> i)Plot the time signal with the function plot so that the samples are
> connected. Make sure that ...Complex FFT in DSP vs Matlab
I use TMS320c6713 DSP.
I compared result of complex fft library in TI DSP with result of
complex fft in Matlab.
Those waveform in frequency domain are similar, but exactly not
Range of result in DSP library is wider than one in Matlab.
> Hi, everyone!
> I use TMS320c6713 DSP.
> I compared result of complex fft library in TI DSP with result of
> complex fft in Matlab.
> Those waveform in frequency domain are similar, but exactly not
> It means..
> Range of result in DSP library is wider than one in Matlab.
Because the MathWorks and TI used different algorithms. A more specific
answer depends on the details of the implementations in both MatLab and
the TI library -- and you can bet that you'll never get the MathWorks to
cough up their code.
If it really matters -- code it yourself.
Wescott Design Services
Posting from Google? See http://cfaj.freeshell.org/google/
"Applied Control Theory for Embedded Systems" came out in April.
See details at http://www.wescottdesign.com/actfes/actfes.html
On Feb 14, 9:08 pm, Tim Wescott <t...@seemywebsite.com> wrote:
> Because the MathWorks and TI used different algorithms. A more specific
> answer depends on the details of the implementations in both MatLab and
> the TI library -- ...