Hi, I need help of how to transform RGB image to HSV in Matlab code. TQ

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3/24/2010 1:21:06 AM

On Mar 23, 9:21=A0pm, "Farie " <ocu96...@yahoogroups.com> wrote: > Hi, I need help of how to transform RGB image to HSV in Matlab code. > > TQ --------------------------------------------------- TQ: Okay! I guess you'll be using rgb2hsv() to do that, unless you want accurate results instead of the book formula. In that case you'll have to calibrate your system by imaging a known standard, such as the xrite ColorChecker Rendition Chart. It can be quite tricky and involved to do calibrated color imaging if you really need the utmost accuracy (involves measuring the OECF of the camera/scanner, using a spectrophotometer, etc.), so I'm not going to get into it. ImageAnalyst

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3/24/2010 2:38:17 AM

Hi, I am learning about digital decimation. The problem is like this: Z-transform of input sequence and filter aree X(z), H(z) respectively. After the filter H(z), there is a 2 decimation. From one book talking about decimation, it says the Z-transform of output sequence after decimation is: V(z)=(1/2)*[H(z^(1/2)*X(z^(1/2))+H(-z^(1/2)*X(-z^(1/2))] I have learned Z transform, but no Z transform with exponential of (1/2). Can you tell me how to get the above result? Or, give me some link relate to that. I have checked DSPGuru website without success. Thanks in advance. freelait2000@yahoo.co...

Hi All, I have studied three diff kinds of transforms, The laplace transform, the z transform and the fourier transform. As per my understanding the usage of the above transforms are: Laplace Transforms are used primarily in continuous signal studies, more so in realizing the analog circuit equivalent and is widely used in the study of transient behaviors of systems. The Z transform is the digital equivalent of a Laplace transform and is used for steady state analysis and is used to realize the digital circuits for digital systems. The Fourier transform is a particular case of z-transform, ...

I want to play a little bit with fourier transformations. Until now I always used phantom(256) to get a object and fourier transformed it. Now I would like to use pictures. For example I created a circle with my drawing program and saved this file as an jpeg. if I now load this picture with imread('pic.jpg') I can't fourier transform it because it is not a double class but some uint8 class object. I tried to save the picture as an indexed file (thats what the matlab help says) but it didn't help. so is there a way to load picture in order to do fft? If not, is there a way to dr...

Hey all, I want to map an int to a color on a rainbow spectrum, i.e. for an int n in the range 0..N, low values (near 0) should map to the red end, and high values (near N) to the blue/violet end. The return values should be R, G, B tuples (well, "#xxxxxx" color codes, but that's not the hard part.) The trouble I'm having is in coming up with a good way to generate color values that approximates the "ROY G BIV" rainbow spectrum. This is just a simple, non-scientific, non-photographic application, nothing fancy. I've tried a simple scheme of overlapping sines...

Hello All, Please provide a solution for getting the Implementation Of Fourier Mellin transform for Image? Also, as i require to calculate fourier mellin of each image , i have to store each value in database.Plz provide the suggestion for getting FMT of Image in Matlab. Thanx all. Awaiting for ur responses. ...

How to combine 3 grayscale images into one RGB color image ? I have 3 "DensityGraphics" pictures and I want to combine them in such a way that the one represents the Red, the others - green and blue colors correspondingly. This procedure is called "merge channels" in Photoshop. It must be quite easy to solve that even without external packages, but I am not experienced enough. Thank you. I don't understand mixing colors so this probably isn't right, but it may get you started. Needs["Graphics`"]; nr=5;nc=4; r=Table[Random[],{nr},{...

Hi Im currently trying to work out some applications for the DFT in both the scientific and communications domain. Please could somebody offer me some examples of both? Cheers Tuurbo tuurbo46@yahoo.co.uk wrote: > Hi > > Im currently trying to work out some applications for the DFT in both > the scientific and communications domain. Please could somebody offer > me some examples of both? What do you mean by "work out"? Jerry -- Engineering is the art of making what you want from things you can get. �������������������������������������������������������������...

Iam implementing turn to turn fault for a transformer.But Iam unable to create turns for Linear transformer in SIMULINK.I want to how to give the parmeter of no of turns for a Linear transformer in SIMULINK I would greatly appreciate if u can give me some advice. Thank you. bye ravi ...

Hi all, I'm new in DICOM, i need to clarify these following concept: modality LUT transform, VOI LUT transform and representation LUT transform. Does anyone have thought? Thanks On Jun 14, 10:21=A0am, quyps <phamsyqu...@gmail.com> wrote: > Hi all, > > I'm new in DICOM, i need to clarify these following concept: modality > LUT transform, VOI LUT transform and representation LUT transform. > > Does anyone have thought? > > Thanks Look in DICOM Part 4, Annex N, which describes the grayscale display pipeline. ...

Hi, I'd like to transform a square image and warp it so that it's circular. I know there's a imtransform function in matlab but I have a hard time understanding how it works. Would someone care to give sample code to do this? Also, can this be extend to 3D (i.e. cube to sphere)? Thank you, Mike Mike: <SNIP wants to put his/her friends face onto a sphere... > I'd like to transform a square image and warp it so that it's circular... there are many solutions % 1) a simple texture warp img=load('clown'); figure; [x,y,z]=sphere(128); sh=s...

I have to create for a project at university a GUI like the one from Wavelet toolbox,but not so complex.I need 1D 2D,DWT,IDWT,decomposition,coefficients..if anyone has smthg like this please contact me.A good day! "haiduc " <pimpiniho@yahoo.com> wrote in message news:hu22rb$r9t$1@fred.mathworks.com... >I have to create for a project at university a GUI like the one from >Wavelet toolbox,but not so complex.I need 1D >2D,DWT,IDWT,decomposition,coefficients..if anyone has smthg like this >please contact me.A good day! No one here is simply going to give...

I'm creating a 2D geographical map using Java graphics and have created Point, Line and Shape classes as well as a Matrix class to perform transformations. Within my transformation class I have methods to perform rotation, translation and scaling. If I want to zoom into my map what kind of matrix transformation do I use? Will scale work or do I have to perform a different type of matrix manipulation? ...

Hi I'm looking for some good image transformation function(s) form my program. I'm trying to use NN to classify hand gestures. That's why I need to transform my binary hand gesture image into vector (for training and testing). I looking for function(s) that is(are): * able to give me quite small vector (less then 320 fields) * able to return similar vector (for the same gestures) values when changing angle of hand gesture in front of camera * able to return similar vector (for the same gestures) when changing distance to camera I know that I might need more...

Let A be an affine transformation and v a vector. The book "Geometric Tools for Computer Graphics" says: T(v) = T(Q - P) = T(Q) - T(P) But 1 + (-1) = 0. Don't the weights of the points need to sum to one? Q - P isn't even an affine combination... A vector being the difference of two points is not translated over affine transformation. So, vectors are transformed linearly, not affinely. For an affine transformation T(x) = Bx + c, where B is a square matrix whose columns are the target coordinates of the local unit axes and c the target position of the local origin, ...

http://techreport.com/discussions.x/22284 1920x1200, front camera upped from 1.2MP to 2MP 1080p camera. This is looking even sweeter. -- MFB On 12-01-10 6:15 AM, Flint wrote: > http://techreport.com/discussions.x/22284 > > 1920x1200, front camera upped from 1.2MP to 2MP 1080p camera. > > This is looking even sweeter. > You just wait until Apple comes up with its own 7 inch tablet (by far, the most practical form factor, IMNSHO) and that will most certainly be innovation! ;) On 1/10/2012 7:28 AM, Nashton wrote: > On 12-01-10 6:15 AM, Flint wr...

what's wrong with the following code #include <string> #include <algorithm> #include <cctype> char *name =3D "HHTT KKK KHH"; std::string lname( name ); std::transform( lname.begin(), lname.end(), lname.begin(), tolower ); The error comes in the last line. C:\web\httpgrab122\happyhttp.cpp|514|error: no matching function for call t= o 'transform(__gnu_cxx::__normal_iterator<char*, std::basic_string<char, st= d::char_traits<char>, std::allocator<char> > >, __gnu_cxx::__normal_iterato= r<char*, std::basic_string<char, std::char_...

Cheers, I've been struggling all day today with this, maybe you could give me some useful pointers. I would like to (elegantly) concatenate a string out of all node values in a map. I have to do it without using boost (as it is forbidden to use it in our project). (Forgive me for giving a non-compiling code.) ---- begin ---- map<int,string> m; string s; transform(m.begin(),m.end(),????, select2nd<int,string>()); ---- end ---- What would you recommend placing instead of ???? ? I've an ugly solution where I declare (something like): vector<string> v; transform(...

Great color and ready for those Commodore classics! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=62054&item=8103647482&ssPageName=STRK:MESSE:IT "Tom Ramm" <ttr1@comcast.net> wrote in news:UNKdnZzdiPtEugPdRVn-vw@comcast.com: > > Great color and ready for those Commodore classics! > > > http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=62054&item=81036 > 47482&ssPageName=STRK:MESSE:IT 1 bid @ $12.99... man, I wish I could find one that cheap in Canada for sale. ...

i have frequency caracteristics of a lawpass filter, cutoff frequency,width of the transition band,undulation of the bandwidth,gain in the stopband and i would get the transfer function and its z-transform using matlab commands, can anybody help me,ireally need thanks On 3/7/2012 4:55 PM, khadidja wrote: > i have frequency caracteristics of a lawpass filter, cutoff frequency,width of >the transition band,undulation of the bandwidth,gain in the stopband > and i would get the transfer function and its z-transform using matlab commands, >can anybody help me,ireally need > thank...

Hello, all: Thank you in advance for the help. I have to admit that I am almost ignorant on wavelet although I sometime use the matlab wavelet toolbox for de-noising. I need to do some lossless compression using wavelet. I found the reference [1]. But it is beyond my domain to implement it. I am I am wondering if the integer to integer transform using wavelet has been implement as a function in matlab. The function probably should look something like transformed_integer_series = wavelet_int2int(original_integer_series, wavelet_chosen) Thank you very much... Alex [1] Wavelet Tran...

Hi all, I am studying a digital phase locked loop. The closed loop filter of this loop has the following Z-Transform : H(z) = ((K1+K2)*z^-1 - K1*z^-2) / (1 + (K1+K2-2)*z^-1 + (1-K1)*z^-2) I would like to know the damping factor and the natural pulse of the equivalent time continuous filter H(p). by equivalent, I mean a filter H(p) that would give in the time domain, the same response to an unit step than the one I would get in the discret domain (one being the discretized version of the other). I thought I just had to replace z by 1+p in H(z). doing the approximation e(p)=1+p. But it ...

Hello Sas-Users, How can I transform this table : ID ID_BIS AGE SEXE 1 1 20 F 2 2 25 M 3 2 10 F 4 2 5 F INTO ID ID_BIS AGE SEXE 1 1 20 F 2 2 25 M 3 2 25 M 4 2 25 M please. Thanks. ash007. actually, we have to duplicate the information age and sexe where id_bis is equal. On Nov 29, 7:35=A0am, ash007 <ramsamyash...@gmail.com> wrote: > actually, we have to duplicate the information age and sex...

Hello, I am trying to transform an expression that involves Sin[x] and Cos[x] into an expression that only contains Cos[x] terms. However, I do not succeed. The very problem seems to be that the built in rules that Mathematica knows, will always rewrite e.g. terms like -Cos[x + Pi/2] to Sin[x]. E.g. assume: f = Sin[x] + Cos[x] Now, for the sake of the example, I want mathematica to start represening f as Cos[x] - Cos[x + Pi/2]. So I try: In : f /. Sin[x] -> -Cos[x + Pi/2] Out: Sin[x] + Cos[x] It seems that mathematica does nothing, but it does: It does the repl...

I stand corrected, thanks. Hopefully the poster will look through the = posts to see that binning the data is probably not appropriate.=20 SPlus has captured David??? Oh, no...he must be terrorizing all the new = statisticians into THINKING!!! Yes, one could hypothesis that a decrease in wealth could cause oil = prices to rise. Most people would assume without testing that the = hypothesis is not correct. Suppose, though, all those farmers who had = the values of their land decline started driving long distances with = their Silverado's or F150's, thereby dramatically increasing...

Power Spectrum Density (PSD) of the randomized switching signal is defined as: The fourier transform of the auto_correlation function of the signal. How to express this in A Matlab code to get the PSD for a randomized signal y=[6 3 7 9 2 1 7 6 5 3 5 9] that corresponds to a time series t=[1 2 3 4 5 6 7 8 9 10 11 12]. Thank you Ashraf Awad ...