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Image Analyst


Last seen: Today Active since 2010

Senior Scientist (male/man) 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. Member of the Mathworks Community Advisory Board. 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

Programming Languages:
MATLAB, Visual Basic
Spoken Languages:
English
Professional Interests:
Industrial Statistics, Deep Learning with Images, Image Processing and Computer Vision

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Content Feed

Answered
count the # of rows of CSV files in a folder, part 2
Maybe, but that's unnecessarily complicated. Just use ** in dir to get only csv files in the top level folder and subfolders an...

ungefär 12 timmar ago | 0

Answered
trainingOptions for a RCNN detector with AlexNet
Why are you retraining it when you said it has already been trained to recognize stop signs? If that's true, just delete the fi...

ungefär 12 timmar ago | 0

Answered
How to extract a Roipoly area in an image with poly2mask function under my own defined coordinates
poly2mask expects x and y to be in pixels. drawpolygon will give you the coordinates in pixels and thus should be fine for use ...

ungefär 13 timmar ago | 0

| accepted

Answered
How to save two variables and create a function to use it later
Try this to save your two vectors in a .mat file and then recall them later % Save time and y variable save('Time Data.mat', '...

ungefär 13 timmar ago | 0

Answered
+60k Lines on one plot - Too slow
Plot just a subsample of the curves. You'll never be able to see all 60k lines anyway, so just pick, say 1000 of them at random...

ungefär 15 timmar ago | 0

Answered
Why is imcolordiff not symmetric and what is output range?
I didn't even know about this fairly new function. Maybe I should read release notes. Or maybe I just forgot about it. No it'...

ungefär 17 timmar ago | 0

Answered
I have sensors values in the form of multiple csv's want to read each file and if the length is less than 800 take average of each column and insert in the last of csv
See the FAQ: https://matlab.fandom.com/wiki/FAQ#How_can_I_process_a_sequence_of_files?

ungefär 19 timmar ago | 0

Answered
generate a random number base on pdf function
You need to do "inverse transform sampling" so you need the CDF, as the esteemed @John D'Errico said. https://en.wikipedia.org/...

ungefär 20 timmar ago | 0

Answered
Added a new Toolbox but Matlab says I don't have it
Try restoredefaultpath If that doesn't fix it, either reinstall, or call tech support on Monday for free installation suppo

ungefär 20 timmar ago | 0

Answered
how to write codeing phylogenetic diversity index
I'm assuming you don't have the inputs needed to use that index. Maybe pick a different diversity index - one that is easier to...

ungefär 20 timmar ago | 0

Answered
How can I make .mat file for SVM with 85 images?
What are the features that you measure for your SVM? You can collect them all in to a table for your training images, then use ...

ungefär 20 timmar ago | 0

Answered
Do you know any histogram modification methods?
In the Image Processing Toolbox there are histeq, which gives lousy images, adapthisteq which gives good images. imadjust wh...

ungefär 21 timmar ago | 0

Answered
I have problem to open Deep learning App
Try this. Tell us what you see in the command window: % Check that user has the specified Toolbox installed and licensed. % h...

ungefär 21 timmar ago | 0

Answered
How do I store an input value to a variable each time?
See this snippet of code. Adapt as needed % Ask user for two floating point numbers. defaultValue = {'45.67', '78.91'}; titl...

en dag ago | 1

| accepted

Answered
can someone teach me how to find optic disc using three channels (RGB) ,shannon information content per channel in the ROI, OD centre using the circular Hough transform
Are you talking about color channel? The blue channel should have the greatest contrast between the retina and the optic disc. ...

en dag ago | 0

Answered
How to write MATLAB Scripts for FLIR's ResearchIR?
You should ask FLIR or check the FIle Exchange. All I have is the attached demo, and my Image Segmentation Tutorial: Image Ana...

en dag ago | 0

Answered
I want to find end to end distance of this skeleton image
What exactly is the end to end distance? Do you mean the Feret diameter bwferet? Do you mean the sum of all white pixels to ...

en dag ago | 0

Answered
How do I export a complete list of users at my institution?
Ask the license administrator at your institution. They may have that. Now whether they'll hand over the list to you is anothe...

en dag ago | 0

Answered
How can I create a curve that will fit my data?
fitnlm in the Statistics and Machine Learning Toolbox, since 2013b, though you should probably upgrade your antique 8 year old v...

en dag ago | 0

Answered
Help with the code for converting hyperspectral image to excel file
Try this: baseFileName = sprintf('%s%s%d.xlsx', dataname, datasetname, i); fullFileName = fullfile(dataSaveDir, baseFileName);...

en dag ago | 0

Answered
How to use the same directory for all functions in app designer?
This works on my computer: Folder = 'E:\Movies'; % FileList = dir(fullfile(Folder, '*.mkv')); FileList = dir(fullfile(Folde...

en dag ago | 0

Answered
How to find the curvature of a surface plot?
Youi have to define where the "top part" is, particularly if the whole thing is curved, just to a greater or lesser degree. Is ...

en dag ago | 0

Answered
Thinning lines preserving 4-connectivity
There does not seem to be an option to skeletonize with bwskel or bwmorph to create a skeleton with 4-connectivity. It looks li...

2 dagar ago | 0

Answered
New to coding - Error /.DS_Store (Name is nonexistent or not a directory) on MacBook
I think that's just some sort of system bookkeeping file on Macs. It's not a file you'd ever want to process in any way so just...

2 dagar ago | 0

Answered
How to use the same directory for all functions in app designer?
Try this: folder = pwd; % wherever you want % Get a list of all .txt, .png, and .csv files: fileList = [... dir(fullfile...

2 dagar ago | 0

Answered
How can I create a curve that will fit my data?
I can see from what you did plot that there are not enough points in "dataset" to get the three colored curves that you are hopi...

2 dagar ago | 0

Answered
How to run a .exe file in other computers without Matlab?
I don't think so because the library is so huge. It's up to 3.6 GB now. I don't think a 3.6 GB executable would be good. So t...

2 dagar ago | 0

Answered
Resolving value of variable to restricted range
I don't think you need an if statement or a for loop. Here is one way to do it: X = 30 % Sample starting number. while X < -p...

3 dagar ago | 0

| accepted

Answered
Speeding up fread for random position in big file
There is also memmapfile - a function older than the datastore family of functions. Maybe @Steven Lord can explain the differ...

3 dagar ago | 0

Answered
In a custom CNN network, how can I know about the input size for each layer?
When you build a custom network, for example like this: layers = [ imageInputLayer([227, 227, 3]) convolution2dLayer(...

3 dagar ago | 0

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