Community Profile Swati Jain

13 total contributions since 2017

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Question

How to fit a curve to a step function?
Hi, I am trying to fit curve to a step function. I tried no. of approaches like using sigmoid function,using ratio of polynomia...

4 months ago | 3 answers | 0

3

Question

How to fit a polynomial to a step function??
Hi, I have a noisy step from a scnner result. Is there any way to fit a higher order polynimial to step ? I am not sure which p...

7 months ago | 1 answer | 0

1

Question

How to calculate spatial frequency after taking fft in case of oversampling?
Hi, I am calculating Fourier transform of an image. Width of each pixel is 0.004 mm. I re-sample my image at every pixel ...

1 year ago | 1 answer | 0

1

Question

Circle Fit at the Corner of the Step??
Hi, I have a step curve (figure 1) and I want fit a circle to each corner of step (shown in figure 2). I wrote the followin...

2 years ago | 2 answers | 0

2

Question

How to select a region of interest (ROI) from 3-d point cloud data?
Hi, I want to select a rectangular region from my 3-d point cloud data (.asc file format). I applied two approaches to do tha...

2 years ago | 1 answer | 0

1

Question

How to rotate a figure in MATLAB?
Hi, I generated a figure of step through imagesc with x,y and z values. x and y are a column vectors and dimensions of x is n...

2 years ago | 1 answer | 0

1

Question

How to convert local coordinate to Global Coordinate of a 3d plane?
Hi, I have a 3d plane with equation: z+0.898x-0.443y=452, I got this equation by plane fit. This plane is inclined at a crazy...

2 years ago | 0 answers | 0

0

Question

How to extract data of lower surface only in a step profile?
Hi, I have a 3-D plot of step function and want to extract data of lower surface only. I tried to literally read the data of ...

2 years ago | 1 answer | 0

1

Question

How to fit Plane (z=ax+by+c) to 3D point cloud data?
Hi, I am trying to do plane fit to 3D point data. Point cloud file is attached. Here is my code I tried using least square met...

2 years ago | 1 answer | 0

1

Question

Plane fit (z=ax+by+c) to 3D point data
Hi, I have step plot (attached) and I want to fit a plane on the lower terrace of it. Excel file of point cloud is attached a...

2 years ago | 2 answers | 0

2

Question

How to extract data from ".asc" files in MATLAB??
Hi, In my work I have to scan any object from fringe projector and then I will have a '.asc' file with 6 columns. I am assumi...

2 years ago | 2 answers | 0

2

Question

Calculation of pixel shift
Hi, I have a slated edge image and I want to know the value of required pixel shift to make it vertical. I know the pixel va...

2 years ago | 3 answers | 0