# Jürgen

Active since 2012

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Inserting excel files from different folders for different processing

mer än 10 år ago | 0

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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...

mer än 10 år ago | 1 answer | 0

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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...

mer än 10 år ago | 1 answer | 0

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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; ...

ungefär 11 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...

mer än 11 år ago | 1 answer | 0

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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...

mer än 11 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...

mer än 11 år ago | 0 answers | 0

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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...

mer än 11 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...

mer än 11 år ago | 1 answer | 0

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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...

mer än 11 år ago | 0

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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...

mer än 11 år ago | 0

Solving homogeneous linear set of equations

mer än 11 år ago | 2

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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

mer än 11 år ago | 0

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...

mer än 11 år ago | 0

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...

mer än 11 år ago | 0

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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...

mer än 11 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...

mer än 11 år ago | 1 answer | 0

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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...

mer än 11 år ago | 0

Check if matrix contains zero or not and ...

mer än 11 år ago | 0

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...

mer än 11 år ago | 0

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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...

mer än 11 år ago | 0

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...

mer än 11 år ago | 1

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

mer än 11 år ago | 0

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...

mer än 11 år ago | 0

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 ...

mer än 11 år ago | 0

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

mer än 11 år ago | 1

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....

mer än 11 år ago | 0

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 ...

mer än 11 år ago | 0

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...

mer än 11 år ago | 0

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 ...

mer än 11 år ago | 0