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# Mehri Mehrnia

Last seen: 12 days ago Active since 2021

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Save all the plots
Based on the answers, it means there is no 1 line of code which can save all open plots?

6 months ago | 0

Question

spline for corner object
I have a contour that I have extracted important points of it based on detectHarrisFeatures. Now I need to connect these points ...

6 months ago | 2 answers | 0

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Question

extract control points of curve with spline
I almost studied whole matlab help and mathwork posts about spline. But, nobody wants to extract control points out of a give...

7 months ago | 2 answers | 0

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Question

norm vector of pixels on edge of an image
I need to show norm vectors of of each pixels on edge of image. an example is attached

7 months ago | 1 answer | 0

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how to find the gradient of pixels in angular direction?
If I want to find the norm of edge, should I replace 30 with 90 in the above formula? Is "H*cosd(30)+V*sind(30)" a vector or p...

7 months ago | 0

Question

change histogram to PDF
I have attached a histogram which is attached. This histogram is computed step by step based on milions of samples. If I don't...

7 months ago | 1 answer | 0

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How can we calculate probability density of a histogram?
I have the same problem , just at I want to have same edges in both before normalization and after normalization. I got an str...

7 months ago | 0

Question

pair-was operation on 3D image(3D matrix)
I have 3D image, in fact it's slices of heart which is a 3D matrix(i.e N=640*640*64). I want to do an operation such as asb(diff...

7 months ago | 2 answers | 0

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Enlarging an image with spline interpolation
Hi, I really appreciate this Q/A, helped me. I have a countour which is a complex shape(left atrial of heart). I want to sele...

8 months ago | 0

Question

difference of SSIM and multissim?
I work on MRI images and now I assess different k-space trajectories on mri images. I used ssim and nrmse to assess the qualit...

8 months ago | 1 answer | 0

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What's the difference between imagesc and imshow?
I work with cardiac MRI images(grayscale). it happens repeatedly that "imagesc" shows the image while "imshow" shows a nonsence ...

8 months ago | 1

Find differences in a set of points without a for loop
I have the question to find all pair-wise difference in a group without loop! My array in scale of milions!

9 months ago | 0