Aude Rapet

Actif depuis 2016

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Question

Why the dimensions of my picture in pixels is reduced when I save my image?
Hi, I filter an imageA with a function called bpass and then I display it with imagesc to be able to save it (as .tif). Image...

environ 9 ans il y a | 2 réponses | 0

2

réponses

Question

Problem with non equal dimensions when cropping using imcrop
Hi, I have 3 pictures, try to write a code to select an area on my a3 picture with getrect, and then crop my a1 and a2 pictur...

environ 9 ans il y a | 1 réponse | 0

1

réponse

Question

Shift the origin (0,0) of the pixels in my image
Hi, As an input of my code, I need to have some positions on my picture: the positions are in pixels and the origin (0,0) is ...

environ 9 ans il y a | 3 réponses | 0

3

réponses

Question

Delete certain rows of a matrix based on specific values
Hi, I am a beginner in Matlab. I have a matrix that has 2 columns and thousands of rows. I need to delete the rows based o...

environ 9 ans il y a | 1 réponse | 0

1

réponse

Question

Find geometric transformation between a pair of images : does imwarp take into account the translation?
Hi, I am a beginner in Matlab and try to find the rotation + translation that exists between my two images (because my sample...

environ 9 ans il y a | 1 réponse | 0

0

réponse

Question

How to interpret the drift between 2 images, using cross-correlation?
Hi, I am a beginner in Matlab and I need to remove the drift (which exists because of the microscope when capturing the images ...

environ 9 ans il y a | 1 réponse | 0

0

réponse

Question

Why rgb2gray(double(imread('picture.jpg')) gives a matrix of value 1?
Hi, I am a beginner in Matlab, I try to read my picture that I cropped with paint and convert it to double, and I obtain: 13...

environ 9 ans il y a | 1 réponse | 0

1

réponse

Question

compare two matrix and keep only the elements in common
Hi, I am a beginner in matlab, and I need to compare to matrix and then keep only the elements present in both matrix in my 1s...

environ 9 ans il y a | 1 réponse | 0

1

réponse

Question

Problem to delete rows in my matrix
Hi, I am a beginner in matlab and I try to delete rows from my matrix when two following values in my 3rd column are the same...

environ 9 ans il y a | 1 réponse | 0

1

réponse

Question

copy datas, one above the others, in a new matrix
Hi! I am a beginner in matlab. I want to copy the first two columns of my variable cnt in a new variable called o : and my 3...

environ 9 ans il y a | 1 réponse | 0

1

réponse

Question

Help to interpret histogram which check datas obtained with particle-tracking code
Hello, I have to understand a particle tracking code, and at the end of the code, in order to make sure that we have found ou...

plus de 9 ans il y a | 1 réponse | 0

0

réponse

Question

Error with permute function : which order to use??
Hi, I am using a code written by someone else, and I think he used an older version of Matlab than mine. Anyway, when I try ...

plus de 9 ans il y a | 1 réponse | 0

1

réponse

Question

low-pass exponential filter - fourier space
Hello, I am a beginner in Matlab and I have to understand a code. The part I don't understand is to calculate filter for disp...

plus de 9 ans il y a | 1 réponse | 0

1

réponse

Question

Quadratic interpolation with Vandermonde matrix - why the use of PINV?
Hi, I am a beginner in Matlab and I have to understand a code. I don't understand this part where they want to do a quadra...

plus de 9 ans il y a | 1 réponse | 0

0

réponse

Question

Why double(img) / max(img(:)) ???
Hi, I am beginner in Matlab and I have to understand a code. I don't understand this line : im = double(imread('control_di...

plus de 9 ans il y a | 1 réponse | 0

1

réponse