Answered
how to estimate the density of each pixel in the image?
I am not sure what you mean, but if it is the intensity of a pixel, you can access that as follows: intensity=yourimage(50,...

11 years ago | 0

Answered
overlay to image matrix together
It depends a lot on your images and what you exactly want, but did you try to just sum them? overlay_im=image1+image2; I...

11 years ago | 0

Answered
how to choose weight (lamda)value for thresholding based intensity contrast and variance?
For the modulus you should check this link: http://lmgtfy.com/?q=matlab+modulus

11 years ago | 0

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Answered
Find a series of consecutive numbers in a vector
The following will give the lengths of the consecutive sequences of your vector: q=yourvector; a=diff(q); b=f...

11 years ago | 6

Answered
how to access zip files in the directory?
Using the 'dir'-command you can obtain a list of files. In your case you could use something like: filelist=dir('DATA/*....

11 years ago | 0

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Answered
changing values of pixels in an image pixel by pixel ( Thresholding )
Hi, First I don't understand how your original image can have non-integer pixel values, because it seems your image is 8-bit ...

11 years ago | 1

Answered
Change amount of ticks on a colorbar
The 'YTick' property contains the locations of the ticks on the Y axis, so I guess that set(cbr,'YTick',20:2:50) should...

11 years ago | 5

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Question

Dummy error in parfor
Hi, While running a parfor loop i am getting the following error: Caught-error breakpoint was hit in ParallelException...

11 years ago | 1 answer | 0

Question

Sparse for arrays with lots of NaN.
Hi, I am using very large arrays containing a lot fo NaNs. If they were zeros, I could use 'sparse' to save a lot of memory, ...

11 years ago | 1 answer | 2

Answered
HOW TO WRITE SUMMATION FORM ∑_(i=1) (L-1)
Make an appropriate vector with the values that you want to sum (or select the values from an array containing them) and use the...

11 years ago | 0

Answered
Hi, guys, I am trying to create a MATLAB Subrountine, but I faced some problems. My code is not working, and I don't know what is wrong with it.
Try to remove the first three lines ('clc', 'clear' and the empty line), then rename your file, or function, so that the filenam...

11 years ago | 0

Answered
Average curve for a set of curves
Maybe you can use interpolation (help interp has an example) to generate Y data for a common set of X points, based on your orig...

11 years ago | 0

Answered
How to convert Nan to zero
To set all NaN in Q to zero: Q(isnan(Q))=0; Is that what you need?

11 years ago | 45

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Question

Parfor reports error which does not exist when running as a for-loop
Hi, To speed up some calculations I am using a parfor-loop. I have to run calculations on many files and I made a simple parf...

11 years ago | 2 answers | 1

Answered
How to change the colour of the backgroud
It depends on what type of image you have, but let's say it is a 8-bit grayscale image. In that case you can do the following: ...

11 years ago | 0

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Answered
Is there any matlab code to get time and date from Internet?
Take a look at this: http://www.mathworks.com/matlabcentral/fileexchange/20693-atomic-reminder It has a function where the...

11 years ago | 1

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Answered
doubt regards of centroid
It seems that your labeledImage contains 40 different objects. All of those objects will have a centroid and that's why you get ...

11 years ago | 0

Answered
sigmoid function value for parameter a and b
Well, if the only requirement is that y0 < 0.5 for x=0 and y1 > 0.5 for x=1, then for 0 < b < 1 and a > 0 it should work.

11 years ago | 1

Question

Multi-dimensional version of bwboundaries
Hello, I am trying to get the boundaries of objects in a three-dimensional array. For 2D data, the bwboundaries functio...

11 years ago | 2 answers | 0