35 total contributions since 2015

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Question

Character for "ENTER"

I want to break a loop by pressing ENTER key. What character does ENTER key represent? while (1) if strcmp(get(gcf,...

2 years ago | 1 answer | 0

Question

Motion trajectory of an occluded object

How to find the motion trajectory of an object which is partially occluded in a video sequence? For example in the 2 frames belo...

3 years ago | 0 answers | 0

Question

Convert type while keeping values

How to convert the type of an array while keeping the value of all elements? For example, A = [200 150 30] in uint16 to B = [20...

3 years ago | 1 answer | 0

Question

How to add images to data points

How do I add images to data points just like adding text? labels = [1:2] c = cellstr(num2str(labels)); gscatter(X, ...

3 years ago | 1 answer | 0

Question

Reduce data dimension using PCA

pca() outputs the coefficient of the variables and principal components of a data. Is there any way to reduce the dimension of ...

3 years ago | 0 answers | 0

Question

Execute a list of functions

How do I store a list of user-defined function in an array and execute it in a loop one by one? [d] = func1(a), [e] = f...

3 years ago | 2 answers | 0

Solved

Pizza!

Given a circular pizza with radius _z_ and thickness _a_, return the pizza's volume. [ _z_ is first input argument.] Non-scor...

3 years ago

Question

Unable to Install OS Generic Video Interface Support Package

Matlab version: R2015b (student version) with Image Acquisition Toolbox installed Running Matlab on Windows 8.1 (Windows To ...

3 years ago | 0 answers | 0

Question

Showing Matlab output command on Visual Studio using Matlab Engine

I use Matlab engine to run below matlab script on Visual Studio. % test.m for i=1:30 fprintf('i = %d\n', i); ...

3 years ago | 0 answers | 0

Question

Array of 1 and 0 to decimal

How to convert array with 1's and 0's (array A) to decimal (array B)? A = [1 0 0 1 0 0 1 1; 0 0 0 0 1 1 1 1; 1 0 1 0 1 0 1 ...

3 years ago | 2 answers | 0

Question

Rotation of orthogonal projection

I have a depth image (x,y,z = pixel value). I project the image into top and side views: for i = 1:rows for j = 1:cols...

3 years ago | 0 answers | 0

Question

Number of non-zero element

I have n-number of arrays, I want to find the total non-zero element at a location. For example there are three arrays as follow...

3 years ago | 1 answer | 0

Question

Depth Image Segmentation Using Depth Threshold

Depth threshold can be used to extract a foreground (e.g a hand) when there's a gap between a foreground and it's background. In...

3 years ago | 1 answer | 0

Question

Foreground Detection Using GMM on Depth Images

I used vision.ForegroundDetector() to detect foreground on RGB video frames. The input of step() is from the vision.VideoFileRea...

3 years ago | 1 answer | 0

Question

Intersect() Problem when none of the pixels overlap

When I used intersect() to find the intersection between A (red) and B (blue), I failed to get any because the pixels don't over...

4 years ago | 1 answer | 2

Question

Removal of noises at edges (2)

How can I get rid of the unwanted pixels circled in red in the image below? <</matlabcentral/answers/uploaded_files/43196/arm...

4 years ago | 1 answer | 0

Question

Removal of noises at edges

I have a grayscale (value 0-255) image with background pixel equals 0. I am trying to remove noises at the border between the fo...

4 years ago | 2 answers | 0

Question

Padding border of a non-uniform region with a value

I would like to add one-pixel padding to the border of a non-uniform region. Instead of looping each pixel and check its 8-pixel...

4 years ago | 0 answers | 0

Question

Separate region by an equation

How to separate a region by an equation. For example I want to find the region greater than the equation y = mx + c. <</matla...

4 years ago | 0 answers | 0

Question

Normalize image orientation and scale

I want to normalize the orientation and scale of these images before I do a similarity measure. How can I achieve this using PCA...

4 years ago | 1 answer | 0

Question

Find turning point in data

How to get data gradient and how to locate significant changes of the gradient? I'm trying to locate the first "turning point" o...

4 years ago | 1 answer | 0

Question

Counting pixel at an angle without rotating image

How to count the pixels along the line (red) that is perpendicular to the major axis (blue) of a region, without rotating the im...

4 years ago | 1 answer | 0

Question

How to get a region from points

Below is a scatter plot from array that I get using boundary(). How can I get a region so that I can use regionprops() to find t...

4 years ago | 1 answer | 0

Question

Exclude last sample as peak despite being the maximum

The first sample is excluded despite being the maximum in findpeaks(). How to exclude the last peak? <</matlabcentral/answers...

4 years ago | 1 answer | 0

Question

Minimum y-value in each column

How to find the first y value (in red) efficiently in each column of the image below? <</matlabcentral/answers/uploaded_files...

4 years ago | 1 answer | 0

Question

The fastest way to find local minimum

What is the most efficient/fastest way to find the circled local minimum below, the lowest minima between two highest peaks? The...

4 years ago | 1 answer | 0

Question

Finding Special Feature in 3-D points

I have 3-D points data as following. Could you suggest a way to locate the two features circled? I can use regression and dy/dx...

4 years ago | 0 answers | 0

Question

Reading a huge text file using Textscan()

I have a .txt file with 3235K number of lines, and 25 space delimited columns. I use the following code to read the file: ...

4 years ago | 1 answer | 0

Question

Random pick data by label

I have a data array (13x5). The last column is the class (1-4) of each data. How do I randomly pick n-number of data from each c...

4 years ago | 1 answer | 0

Question

Separate a blob into multiple regions

Is it possible to separate a blob into multiple regions and find out the centroid and major axis of each region? <</matlab...

4 years ago | 1 answer | 0