Community Profile

Preetham Manjunatha

University of Southern California

Last seen: en dag ago Active since 2014

Enthusiastic and versatile Research Associate with a Ph.D. in Applied Computer Vision and Machine Learning.

Programming Languages:
Python, C++, C, MATLAB
Spoken Languages:
English, Hindi
Professional Interests:
Machine Learning and Deep Learning, Image Processing and Computer Vision

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Submitted

Weighted adjacency matrix of an image using energy function
Creates a weighted adjacency matrix from an energy matrix for an image. Average, similarity, and dissimilarity between the nodes...

Submitted

Multiclass metrics of a confusion matrix
Given the confusion matrix finds the two or multiclass metrics such as precision, recall, F1-score, and others.

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Random graphs and trees
Creates Erdos-Renyi, geometric random graphs, and rapidly-exploring random trees (RRT and RRT*).

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Voronoi bounded rectangular or square limits
Provides a bounded Voronoi Diagram with vertices similar to MATLAB [vx,vy] = voronoi(x,y). In other words, prunes the edges that...

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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.

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Automatic panoramic image stitcher (AutoPanoStitch)
Automatic Panorama Stitching software in MATLAB. Supports spherical, cylindrical, and planar projections and recognizes multiple...

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

Question

How to convert row-major linear indices to column-major indices?
I have a row-major linear indices [1,8, 14, 9, 4, 11, 18] from a matrix 3 x 6 (row x column). How to convert this to column-majo...

2

Matlab R2020b freezes when closing figure (Intel macOS Big Sur)
MATLAB R2022a still freezes when the Figure window is closed on macOS 12.3.

Submitted

Line 2 Line intersection point (two line segments)
A fast two-line intersection point-based in parametric space. Finds the intersection point between two lines if it exists.

How can I plot a voronoi diagram with a limited area?
If the Voronoi Diagram bounded region is rectangle or square, here is the link function to clip the extending edges of the Voron...

How do I find the intersection point of two lines in MATLAB 6.5 (R13)?
Here is the link to find the intersection point of two line segments/lines. A fast two line intersection point finder based on t...

How to plot 2 lines and find the coordinates of their intersection?
Here is the link to find the intersection point of two line segments/lines. A fast two line intersection point finder based on t...

How to find the point of intersection of two lines in matlab ?
Here is the link to find the intersection point of two line segments/lines. A fast two line intersection point finder based on t...

Finding intersection point of the lines
Here is the link to find the intersection point of two line segments/lines. A fast two line intersection point finder based on t...

Voronoi boundaries
If the Voronoi Diagram bounded region is rectangle or square, here is the link function to clip the extending edges of the Voron...

Voronoi Diagram Boundaries with a given width
If I understand your problem correctly, are you looking to bound the Voronoi region? If so, here is the link function to clip th...

voronoi within a pre-defined area
Here is the link function to clip the extending edges of the Voronoi Diagram for rectangular or square region. Rigorously tested...

Vertices of polygons in bounded voronoi diagram
Here is the link function to clip the extending edges of the Voronoi Diagram for rectangular or square region. Rigorously tested...

Submitted

Cracks splitter/cropper/augment on a large dataset
To augment the cracks with similar geometric properties, cracks can be split into tile images on a large dataset.

Submitted

Cracks splitter/cropper/augment on a single image
Augments the cracks with similar geometric properties, cracks can be split into tile images.

Matlab R2020b freezes when closing figure (Intel macOS Big Sur)
Same problem macOS Monterey v12.1. MacBook Pro (15-inch, 2018), Processor: 2.9 GHz 6-Core Intel Core i9 and Memory: 32 GB 2400 M...

Submitted

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...

1

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.

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

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