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Image Analyst


29,301 2010 年以降の合計貢献数

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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Randomly select a set number of samples (of size n) without overlap, nor replacement, in a signal
Try this: % Set up the signal and sampling parameters samplingFrequency = 100; % Samples per second. totalSeconds = 6000 % 60...

約2時間 前 | 0

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hello!How can I segment a image using GLCM?
All I have on hand is the attached GLCM demo. Adapt as needed (e.g. threshold the image or whatever).

約2時間 前 | 0

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How to draw multiple rectangular diffraction pattern
Simply use repmat(I, [8, 8]) to replicate your image 8 times in every direction. lambda=632e-9; k=(2*pi)/lambda; a=1e-3; b...

約3時間 前 | 0

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Unequal circles in a rectangle partition into k equal layers
See previous discussions of circle packing: Click here

約3時間 前 | 0

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Statistics problem using MATLAB
Hint: pd = makedist('Exponential','mu',2)

約3時間 前 | 0

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Plot 100 random points in 2-D equations
Try this: % Get a set of random x1 and x2 for g1. x1 = rand(100, 1); x2 = rand(100, 1); g1 = 1 ./ (6*pi) * exp( (((x1-4) .^2...

約20時間 前 | 0

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how do i count unique cell rows?
There are more compact (read cryptic) ways, but this simple and easy-to-understand (for a beginner) way using a for loop and swi...

約20時間 前 | 0

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error using bwferet function in matlab 2016a
It was not until Release 2019a that that function was introduced. For some reason, you didn't fill out the form completely when...

約22時間 前 | 0

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How can I remove unwanted objects and segment the swan?
You can do with functions in the Computer Vision Toolbox. See this link. you mgiht also look at Hus moments: http://www.youtub...

約22時間 前 | 0

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Rayleigh random variables for σ = 1. Plot the histogram for the 20000 symbols and compare it with the corresponding Rayleigh PDF
For what it's worth, I'm attaching my Rayleigh demo. Adapt as needed. I did it a long time ago. There is now a function now b...

約22時間 前 | 0

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How I can choose randomly value from cell?
Here's one way, if you need to get the value within a loop where you're doing other things: SI = {[1, 2], [2, 3]} for k = 1 : ...

約22時間 前 | 1

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how to search for a red circle in an image?
Sorry, I can't do it without using any built-in functions, though the functions I use are pretty low level, like imread(), imsho...

約23時間 前 | 0

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How to Ignore the last line from a file read
Try this: % Read in data. d = importdata('data.txt') % Now plot each row of data for k = 1 : 4 plot(d(k, :), '.-', 'Line...

1日 前 | 0

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How to create a FILLED circle within a matrix
See the FAQ on how to create a circle

1日 前 | 0

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Darcy's law
You're setting up your boundary conditions incorrectly. You're overwriting the corners with different numbers. I think maybe y...

1日 前 | 0

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How to access image name in imageDatastore?
Use fileparts(): imds = imageDatastore('*.png') fullFileNames = vertcat(imds.Files) for k = 1 : length(fullFileNames) [fold...

1日 前 | 0

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Warning creating vertical line using xline
It worked for me. As an alternative, you might try the older line() and then use text() to place the text annotation.

1日 前 | 0

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Choose my k-term from matrix and defines by itself on for loop
It's not clear. Not sure what x1, a, and c are. It looks like the user enters some number of values for x1, then somehow, some...

1日 前 | 0

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Index in position 1 is invalid. Array indices must be positive integers or logical values.
The first row is not 0 -- it's 1. Try plot(x, Tdata(1,:), 'b-', 'LineWidth', 2); This is one of the most frequently asked que...

1日 前 | 0

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How to get cluster more than 2 if i have :
Just define Cluster3 to be something. What would you want it to be? It could be virtually anything you direct it to be.

1日 前 | 0

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Short Question about Multiple cases in for end
One way is to do nested for loops for j=1:10 for k=0:9 for m=1:11 for n=1:1 x(j)^k + m -2*n end % of n loop ...

1日 前 | 1

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how can I create a function with multiple variables?
Try this: function y = yourFunctionName(x, z) % x,y,z can be taken from database and some values are mentioned below.) ...

1日 前 | 0

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Resistance Calculator For Circuits
Try App Designer: http://www.mathworks.com/products/matlab/app-designer/

1日 前 | 0

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Error Invalid or deleted object while creating a line
When you create a line object and get the handle of the line graphic into "customer" if you want to "NEED TO REMOVE ALL THE CUST...

1日 前 | 0

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Tracking object in video and plot path of object
Extract a frame, find the car and add it's (x,y) coordinate to a growing list of them, then call "hold on" and plot the entire l...

1日 前 | 0

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Why am I getting "Array indices must be positive integers or logical values" when trying to add together all the integers?
This is a VERY frequently asked question. So see the FAQ. Your code runs fine though. I copied and pasted and got htis: C = ...

2日 前 | 0

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Cropping an image using imfreehand()
Try this: grayImage = imread('cameraman.tif'); imshow(grayImage); subplot(1, 2, 1); imshow(grayImage); fontSize = 20; titl...

2日 前 | 0

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find main area of image
Looks like you're doing an edge detection for some reason. Can I see the original image? Because usually edge detection is NOT...

2日 前 | 1

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Fit Powerlaw to Data
I'd use fitnlm() in the Statistics and Machine Learning Toolbox. I suggest that you don't try to fit the first point. When I t...

2日 前 | 0

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How can set colormap for below matirx?
I think this is what you want: clc; % Clear the command window. close all; % Close all figures (except those of imtool.) ...

2日 前 | 1

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