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Image Analyst


Last seen: en dag ago
31 418 total contributions since 2010

Senior Scientist and Inventor in one of the world's 10 largest industrial corporations doing image analysis full time. Ph.D. in Optical Sciences specializing in imaging, image processing, and image analysis. 40+ years of military, academic, and (mostly) industrial experience with image analysis programming and algorithm development. Experience designing custom light booths and other imaging systems. Experience with color and monochrome imaging, video analysis, thermal, ultraviolet, hyperspectral, CT, MRI, radiography, profilometry, microscopy, NIR and Raman spectroscopy, etc. on a huge variety of subjects. Be sure to click "View All" in my File Exchange to see ALL of my demos and tutorials: http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862

Professional Interests: Image analysis and processing

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Answered
Strange behaviour with imaqregister and imaqreset
You might delve into my attached InitializeVideoCamera() function and adapt as needed.

ungefär 16 timmar ago | 0

Answered
Manually from c++ to matlab how?
Such a function in MATLAB might look something like this: function [A, dx2, a, b, c] EXampleC(domain) A = domain.A; dx2 = d...

ungefär 16 timmar ago | 0

Answered
Rename jpg files in a folder
Try this: folder = pwd; % Wherever your input images are stored. outputFolder = fullfile(folder, '/renamed'); % Can be the sam...

ungefär 23 timmar ago | 0

Answered
How do you mark and extract an area from an imagesc-figure?
See my attached masking demo.

ungefär 24 timmar ago | 0

Answered
Classification of voiced unvoiced frames
The first place to look is always the File Exchange. If it's not there, you will probably have to write it yourself, unless som...

en dag ago | 0

Answered
My university allows me to access to matlab but it's licence is expired can I extend it ?
That's a question that should be asked of your professor. If he/she expects you to use it, they should enable you to use it, ri...

en dag ago | 0

Answered
How to save resized image with original filename to a folder.
Try this: % Define input folder location. folder = '/Users/kimpitman/Documents/MATLAB/Vehicle/Test'; % Create output folder n...

en dag ago | 0

Answered
Is it possible to disable the items of listbox using m-scripting?
Yes, in the listbox click event, just immediately disable (deselect) any item that you don't want clicked on by removing it from...

en dag ago | 0

Answered
How to find multiple means of an array
Yes, A(b:c) is A(2 : 1) which is null since your starting index, 2, is after your ending index, 1. So that's why it didn't work...

en dag ago | 0

| accepted

Answered
Trying to take the median values of all of the columns within a 16000x171 table
Try this: % Create sample data. col1 = rand(160, 1); col2 = rand(160, 1); t = table(col1, col2) % Convert table to matrix. ...

3 dagar ago | 0

| accepted

Answered
start up error R2020b
See the FAQ: During_installation.2C_the_installer_crashes.2C_hangs.2C_gives_an_error_message.2C_does_not_authenticate_your_licen...

3 dagar ago | 0

Answered
HSV and thresholding for marine growth project
It looks like it's 100% covered after day 7. I would not recommend imaging. Once the blue background is covered, imaging can't...

3 dagar ago | 0

Answered
MATLAB App GUI :: System Stability
Sure. Try these links: Best way(s) to master MATLAB? - MATLAB Answers - MATLAB Central MATLAB Academy - Free 2 hour training ...

4 dagar ago | 0

Answered
How to find a point within a curve?
Try this: % Extract the curve for X (Volume) x = Array_demand{w}.Volume; % Extract the curve for Y (Price) y = Array_demand{...

4 dagar ago | 0

| accepted

Answered
Can you solve this??
% "how to whrite this in code 0,01x^5-1.4x^3+80x+16.7" % Commas do both statements in sequence - one after the other. % The fi...

4 dagar ago | 0

Answered
Pair of dice always rolled until all results happened between (2-12) ..Expected value of throws to find
I'd do something like... numExperiments = 2000 numRollsPerExperiment = 800; % Instantiate array for the number of rolls it to...

5 dagar ago | 0

Answered
Detect Edges having length greater than 50km
You forgot to attach preprocessed2010.mat. After you get the binary image, A, you can call bwareaopen() to extract only those b...

5 dagar ago | 0

| accepted

Answered
how to avoid for loops or faster way for compute 3x3 avarage value of an image
If you're only doing it at 3 locations, don't worry about using for loops. It will be fast. If you insist on using built-in fu...

5 dagar ago | 0

Answered
How to detect people from top view
I'd try snapping a photo with no people in there first, and then subtract your people photo from it. Then threshold it. backgr...

5 dagar ago | 0

Answered
How to combine the multiple .mat files of ecg to get a single file.
Try this: folder = pwd; %'path to the folder where the files are saved'; fileList = dir(fullfile(folder, '*.mat')); numFiles ...

5 dagar ago | 0

Answered
image processing using entropy
There is an entropyfilt() function in the Image Processing Toolbox.

6 dagar ago | 0

| accepted

Answered
Display Image in separate figure in app designer
You can still call figure() in your code to bring up a separate figure, separate from your main GUI that you built with App Desi...

6 dagar ago | 1

| accepted

Answered
Gaussian filtering in spatial domain
Did you know about imgaussfilt()?

6 dagar ago | 0

Answered
How to apply spatially-varying blur to an image?
See my manual convolution demo. You'll need to change it to make the inner loops change their starting and ending values depend...

6 dagar ago | 0

Answered
How do you average each pixel in an image with a 9x9 square?
Try conv2() or imfilter(): kernel = ones(9)/81; % Define filter window to take the mean in a 9x9 square. blurredImage = imfilt...

6 dagar ago | 0

Answered
Determine periodicity of a signal x(t)=4sin (2 pi t /7 )+ 5 sin (2 pi t/9)
This is not a MATLAB question. It doesn't even need fft or correlation. If you do FFt, you'll simply see two spikes, one for o...

6 dagar ago | 1

Answered
Plotting sinewave looks weird.
This is what I get % Plot a sinewave with a length of 1000 samples, with a sample rate of 40kHz and center frequency at 19kHz. ...

7 dagar ago | 0

Answered
Code for Counting and Lookup
If you have the Image Processing Toolbox, you can also use bwareaopen() and regionprops(): A = [1 0 0 1 1 1 1 1 1 0 0 1 1 1 0 1...

7 dagar ago | 0

Answered
Why is my plot not showing?
Look at the first few lines: clear all; close all; clc; test_points=3; start_point=1000; x_rec(1)=x(start_point); Now...

7 dagar ago | 0

Answered
Line selection if the temperature difference does not change?
To find out if you have stretches of 1's in Adif that are 15 or longer, you can use regionprops Adif = [1, 0, 1,1,1,1,1,1,1,1,1...

7 dagar ago | 0

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