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Preetham Manjunatha

University of Southern California

Last seen: 2 Tage ago Active since 2014

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Panorama image cropper
Crops a fully stitched panorama with black/white background.

Question

Common substring index from two string arrays
I have two string arrays a and b and I need to find the index matching the substring numbers (within string arrays). For example...

26 Tage ago | 1 answer | 0

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3D space tiling (partition/divide the 3D space w/wo overlap)
Divides the 3D space with or without overlaps. Tested on 3D point clouds.

Submitted

Custom colormap
Creates a custom color map given the RGB triplet array.

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Acceleration to velocity and displacement using DSP filters
Filters and converts the acceleration data to velocities and displacements using the signal processing algorithms.

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Curvature measure and visualization
Measures the shape properties of the object boundaries and displays the curvature.

Submitted

Probability density functions distance and similarity
Measures the distances and similarities between two probability density functions of signals.

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Image to cylindrical and spherical projection/warping
Cylindrical and spherical coordinates projection

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Shape curvature histogram
Feature vector of the curvature histogram of the shapes.

How to calculate the curvature of a boundaries in binary images?
Here this function measures the curvature and other shape properties. In addition, it displays the curvature. Here is the T-...

4 Monate ago | 1

How to measure the curvature of object boundary?
Here this function measures the curvature and other shape properties. In addition, it displays the curvature.

4 Monate ago | 0

Question

Memory problem when accessing and copying the 3D array elements by subscripts
I am trying to access/copy values from an image 3D array to another 3D array using the subcripts (rows and columns). I am trying...

4 Monate ago | 1 answer | 0

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Cylindrical projection from image normal coordinates
I am trying to project normal image coordinates to cylindrical projection using the MATLAB's imwrap function. But the output...

4 Monate ago | 0 answers | 0

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How to use the MATLAB Computer Vision toolbox's bundle adjustment for automatic panoramic image Stitching?
I am trying to implement automatic panoramic image stitching as in the Panorama. I have obtained the connected components of the...

4 Monate ago | 0 answers | 0

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How Do I Move a Set of (x,y,z) Points so they Align with the X-Y Plane?
Fit a oriented bounding box and obtain the orientation of that bounding box and invert the rotation matrix of the Euler angles. ...

4 Monate ago | 0

how to fit a plane to my point cloud data and rotate it so that the plane is parallel to the x-y plane.
Fit a oriented bounding box and obtain the orientation of that bounding box and invert the rotation matrix of the Euler angles. ...

4 Monate ago | 0

Question

How to linearize the nested parfor loop?
I have two variables i,j, where j index start depends on i index. n = 3; for i = 1:n for j = i+1:n % Feature mat...

4 Monate ago | 1 answer | 0

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Find unique images from a folder
I have a folder full of images of video frame sequences of same class of varying sizes of frame number extracted from a large vi...

9 Monate ago | 1 answer | 0

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Machine learning model (neural network or SVM) for unequal feature matrices size
I have feature matrices obtained from visual bags of words model for various dictionary sizes. Example, Nx5, Nx10, …., Nx15000. ...

10 Monate ago | 0 answers | 0

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How to convert MATLAB binary feature matrix to decimal?
I have binary feature matrices from BRISK, FREAK and ORB descriptors with 512 number of bits. I tried to use: d = bi2de(featu...

11 Monate ago | 1 answer | 0

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Question

Bar3 plot increase bar thickness
I am trying to plot the stacked bar3 plot. How to increases the thickness of the bars? All the bars look flat. I need something ...

etwa ein Jahr ago | 1 answer | 0

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MATLAB parfor index exceeds the number of array elements
Why MATLAB throws an error even if it shouldn't go to the first case of the switch statement? Below is the minimal example: myc...

mehr als ein Jahr ago | 1 answer | 0

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GPU-based anisotropic filtering of grayscale images
There are quite a number of contribution on sequential anisotropic diffusion filtering. Are there any GPU-based parallel anistro...

mehr als ein Jahr ago | 1 answer | 0

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MATLAB sgtitle overlapping with the title of the subplots
When I use the subplots with group title (sgtitle), the title of subplots on top are overlapping with the group title. Does anyo...

fast 2 Jahre ago | 1 answer | 0

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How to set point cloud transparency?
Suppose I have aligned two point clouds, how can I set transparencies for each point clouds? I tried with the below lines: src_...

etwa 2 Jahre ago | 1 answer | 0

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Matlab figure(s) suppression not working
Hello: I have some issue suppressing the figure(s) in Matlab. I referred to these solutions <https://www.mathworks.com/matlab...

mehr als 3 Jahre ago | 2 answers | 0

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Overlay imagesc on binary image
Hi Matlab users: I am trying to overlay an imagesc image on top of a binary image. I searched for it online, but no luck. Bel...

mehr als 3 Jahre ago | 0 answers | 0

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Neural network for bags-of-visual-words giving a pretty bad training/testing results.
Dear All: I created a feature matrix using (encode, bagOfFeatures functions) visual-bags-of-words using computer vision toolb...

etwa 4 Jahre ago | 0 answers | 0

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Visual bag-off-features evalute vs. fitcecoc classification results are very different
Dear All: I have few questions regarding vision toolbox's visual bags-of-features class. Firstly, I have a feature matrix cre...

etwa 4 Jahre ago | 0 answers | 0