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Jürgen


Active since 2012

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Answered
Inserting excel files from different folders for different processing
Hi, your question looks similar to: http://www.mathworks.com/matlabcentral/newsreader/view_thread/274014 regards,J

nästan 8 år ago | 0

| accepted

Question


The threshold of sobel
Hi, I am trying to find how the sobel threshold is defined: I found : determine the threshold; see page 514 of "D...

nästan 8 år ago | 1 answer | 0

1

answer

Question


How to define color accuracy of an image system
Hi, I am working in image analysis but until now I have very little experience in color measurements. I need to measure the...

nästan 8 år ago | 1 answer | 0

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answer

Answered
increasing the launch angle of projectile so it reaches a certain distance
Hi, I admint I did not check all your code, but if you want something like: theta= Value; thetaStep= StepValue; ...

mer än 8 år ago | 0

Question


Title disappears sometimes somtimes not
Hi, I generate a subplot with the code below. Normally that gives me 8 subplots with a title but for some subplots the title d...

nästan 9 år ago | 1 answer | 0

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Answered
How to calculate the energy of an image and what is the unit of that energy ?
Hi, maybe ths helps: http://www.mathworks.com/matlabcentral/fileexchange/13837-meanstdenergy-of-imagecumulative-gray-level-d...

nästan 9 år ago | 0

Question


Term matrix and regression model formula
hey, am not sure about the way the regression model is formulated in the help file this model is proposed 'MPG ~ Acceleratio...

nästan 9 år ago | 0 answers | 0

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answers

Answered
What is the problem in these code?
Hi, sum(a(:,:,x) (:,1:2:end),2); is not correct , I think What do you want to do there? '(:,1:2:end)' is referring to the...

nästan 9 år ago | 0

Question


Which matlab function can be used to compare spatial distribution grids?
Hi, I have two spatial distributions in a grid, so lets say a 40 x 70 matrix: each grid has the same dimensions e.g. 0.250 m...

nästan 9 år ago | 1 answer | 0

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answer

Answered
multiple if statements in matlab
Hey, difficult to check it without example values but if I understand it well you are comparing a column vector p to a column...

nästan 9 år ago | 0

| accepted

Answered
How to correct the assignment Error?
Hi, there is a function: imhist(I) , quite useful for this work, + if you want to calculate the hist by summing for each va...

nästan 9 år ago | 0

Answered
Solving homogeneous linear set of equations
seems a similar question: http://www.mathworks.com/matlabcentral/newsreader/view_thread/242711 and http://www.mathworks.nl/h...

nästan 9 år ago | 2

| accepted

Answered
Selecting data points in 3D space
Hi, in file exchange there is a file to extract a Volume of Interest, do no if that can help? regards,J

nästan 9 år ago | 0

Answered
noise removal in Image
Ok so I indeed did not understand your question, I got interested and just did some googling: first found a paper: http://www...

nästan 9 år ago | 0

Answered
noise removal in Image
Hi, first, quite a challenge to understand your question? did you check ' How to remove noise? or something like that in ma...

nästan 9 år ago | 0

| accepted

Answered
How can I find an object distance in an image??
hi, first Your question is not clear? second, on a single image you can not extract object distance,=> you need stereovision, o...

nästan 9 år ago | 1

Question


testing collinearity with algorithm collinear7
Hi, I was looking for an algorithm to test collinearity and found : http://blogs.mathworks.com/loren/2008/06/06/collineari...

nästan 9 år ago | 1 answer | 0

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answer

Answered
detect and fit curved lines in an image
Hi, Hough Transform can also be used for detecting curves:http://faculty.washington.edu/cfolson/papers/pdf/cviu99.pdf reg...

nästan 9 år ago | 0

Answered
Check if matrix contains zero or not and ...
http://www.mathworks.com/matlabcentral/newsreader/view_thread/255797

nästan 9 år ago | 0

Answered
How to change a variable within an equation in a loop?
do you mean for Counter=1: 48 s=[ 1 0 -1 F(i)] p(i)=roots(s) end probably I misunderstood becaus ethis seems to simpl...

nästan 9 år ago | 0

| accepted

Answered
Angles from XY coordinates from a matrix
Hi, two possibilities if you want to process a lot of data : you can use loops or vectorize, in this case, with few i...

nästan 9 år ago | 0

Answered
how to adjust the size of the cross
Hi, if your are talking about markers, then the answer is yes, you can set the marker size e.g. from the help docs: plot(x...

nästan 9 år ago | 1

| accepted

Answered
plotting two curve in one axes
use the hold function hold on for example will help regardsJ

ungefär 9 år ago | 0

Answered
Linear plot to contour plot
Hi, to make a contour plot you need two dimensions, since you only have r the radius it won't work You need the (x,y) c...

ungefär 9 år ago | 0

Answered
Differences between script and function file
Hi, the coding between script file and function is the same, only the header is different let's say I make in a script ...

ungefär 9 år ago | 0

Answered
i am new to the image processing. i need help for deblurring the below blurred image.
Hi, If you're new take a look at : <http://www.mathworks.nl/products/demos/image/ipexblind/ipexblind.html> regarsJ

ungefär 9 år ago | 1

Answered
Surface of a equation
[x,y,z] = sphere(); r = 5; figure,surf( r*x +cx, r*y+ cy, r*z +cz) wit (cx,,cy,cz) the center look at http://www.mathworks....

ungefär 9 år ago | 0

Answered
I can not return real values
I think this code does what you want or no what I think that you want :-) Of course much nicer if you make a function of it ...

ungefär 9 år ago | 0

Answered
I can not return real values
I am not sure if I get it , is not so clearly explained but I would work with the length of the OriginalVector of size(OriginalV...

ungefär 9 år ago | 0

Answered
Median filter for rgb images
Hey, I would perform it on one of the channels depinding on which features afterwards you want to extract, or perform it on ...

ungefär 9 år ago | 0

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