# Preetham Manjunatha

### University of Southern California

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**Content Feed**

Submitted

Panorama image cropper

Crops a fully stitched panorama with black/white background.

4 days ago | 1 download |

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 days ago | 1 answer | 0

### 1

answerSubmitted

3D space tiling (partition/divide the 3D space w/wo overlap)

Divides the 3D space with or without overlaps. Tested on 3D point clouds.

3 months ago | 2 downloads |

Submitted

Custom colormap

Creates a custom color map given the RGB triplet array.

3 months ago | 1 download |

Submitted

Acceleration to velocity and displacement using DSP filters

Filters and converts the acceleration data to velocities and displacements using the signal processing algorithms.

3 months ago | 9 downloads |

Submitted

Curvature measure and visualization

Measures the shape properties of the object boundaries and displays the curvature.

3 months ago | 12 downloads |

Submitted

Probability density functions distance and similarity

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

4 months ago | 1 download |

Submitted

Image to cylindrical and spherical projection/warping

Cylindrical and spherical coordinates projection

4 months ago | 2 downloads |

Submitted

Shape curvature histogram

Feature vector of the curvature histogram of the shapes.

4 months ago | 3 downloads |

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 months 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 months 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 months ago | 1 answer | 0

### 1

answerQuestion

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 months ago | 0 answers | 0

### 0

answersQuestion

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 months ago | 0 answers | 0

### 0

answersHow 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 months 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 months 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 months ago | 1 answer | 0

### 1

answerQuestion

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 months ago | 1 answer | 0

### 1

answerQuestion

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 months ago | 0 answers | 0

### 0

answersQuestion

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 months ago | 1 answer | 0

### 1

answerQuestion

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 ...

1 year ago | 1 answer | 0

### 1

answerQuestion

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...

1 year ago | 1 answer | 0

### 1

answerQuestion

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...

1 year ago | 1 answer | 0

### 1

answerQuestion

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...

2 years ago | 1 answer | 0

### 1

answerQuestion

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_...

2 years ago | 1 answer | 0

### 1

answerQuestion

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...

3 years ago | 2 answers | 0

### 2

answersQuestion

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...

3 years ago | 0 answers | 0

### 0

answersQuestion

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...

4 years ago | 0 answers | 0

### 0

answersQuestion

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...

4 years ago | 0 answers | 0

### 0

answersQuestion

Issue with getframe and getimage commands while saving the image (image size mismatch).

Hello: I have an issue while using getimage() command. I am trying to use a figure, first with imshow to initialize a color ima...

4 years ago | 1 answer | 0