Community Profile

photo

George Papas


University of Edinburgh

8 total contributions since 2013

Contact

George Papas's Badges

  • First Review
  • Thankful Level 1

View details...

Contributions in
View by

Question


The signal intensity of a gray level image with R,G,B indices (hdr file) changes every time the image is multiplied by different binary images (derived from object maps).
I have a 2D gray scale image 'I2' (attached, initially 'hdr' file derived from Analyze) which however, contains R,G,B indices. W...

2 years ago | 0 answers | 0

0

answers

Question


Trace the index of x,y points across an indexed mask?
Hi guys, I have an indexed mask (divided into 4 quadrants, see attached jpeg image and matrix 'Indexed mask') and I want to t...

3 years ago | 0 answers | 0

0

answers

Question


I have a binary mask, with let's say 40 images (Mask(:,:,40) and I want to calculate centroids per image.
I have a binary mask (see attached) with let's say 40 images and I want to calculate and save the centroids across every image. ...

3 years ago | 0 answers | 0

0

answers

Question


Extract 3D cells with nonzero elements, from a 3D cell array.
Hi guys! I have binary masks saved in 3D arrays (e.g. Mask(:,:,40), see attached Matlab file) and I want to extract only the 3D ...

3 years ago | 2 answers | 0

2

answers

Question


How to apply a notch filter in frequency domain data?
Hi, I am new in filters. I have a time domain curve and would like to implement a notch (or similar) filter in the frequency ...

6 years ago | 0 answers | 0

0

answers

Answered
Error using sqpLineSearch (line 22) Objective function is undefined at initial point. Fmincon cannot continue.
I used 'symmetric', still not working. I am afraid there is something wrong with the multiplication between the two functtions i...

6 years ago | 0

Question


Use a band pass filter in frequency domain curves to reduce noise. Any filtering ideas
Hi, I implement some modeling in Matlab and I would like first to reduce the noise in the middle of my frequency domain spect...

6 years ago | 0 answers | 0

0

answers

Question


Error using sqpLineSearch (line 22) Objective function is undefined at initial point. Fmincon cannot continue.
Hi, I am trying to fit a new model in my data using fmincon: [x,fval]=fmincon(@residualF,[0.01 0.01 0.01],[],[],[],[],[0...

6 years ago | 2 answers | 0

2

answers