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Image Analyst


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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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How to graph values of a function above and below 0 as separate functions?
If you absolutely MUST do it with an if/else construct, and throw away most of the benefits of the vectorization capabilities of...

약 3시간 전 | 1

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How to graph values of a function above and below 0 as separate functions?
Try this: t = 0:0.2:3*pi; y = sin(t); y2 = y .^ 2; y3 = y .^ 3; hFig = figure; plot(t,y,'-.b') grid on hold on posi...

약 3시간 전 | 1

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How to use ozone from csv file?
OK, but you forgot to attach your CSV files. In the meantime, see my attached demo of scatteredInterpolant.

약 4시간 전 | 0

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Hello everyone, I have one question regarding image registration.
How about the sum of the absolute differences using imabsdiff()?

약 5시간 전 | 0

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How to correct matrix dimension disagree error
I think you're looking for this: hFig = figure clc; v = 1.0; n=[0.00 0.10 0.12 0.18]; u = linspace(0,2, 30); % However many...

약 5시간 전 | 1

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how to read image from folder with many subfolder directories
Try this: % Get a list of all TIFF files in the current folder AND in all subfolders below it. fileListing = dir('**/*.tif*');...

약 8시간 전 | 0

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Hi, i have an image that contain noise which i have extracted from another image, i want to write the noisy pixel values into a separate .txt file, can anyone help me out with it please?
What does that mean??? Do you want a CSV file with x, y, gray level? Or row, column, gray level? How are you defining which o...

1일 전 | 0

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How to automatically identify abnormal regions and highlight boundaries in a different color
You have to help us first. You forgot to attach 'nhimg-*.jpg' plus you forgot to attach the code for your LungMask(), crop(), a...

2일 전 | 0

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Separating yellow from red in the image
Why don't you use the Color Thresholder on the Apps tab and see what values it uses?

2일 전 | 0

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counting holes in an image
Threshold then call imclearborder() and bwlabel(). Assuming you have dark holes on a bright background: % Binarize: binaryIma...

2일 전 | 0

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Length of distance from centre
You'd do this: %make a 2d arraw of values. imageData=[]; imSize=100; numRows=imSize; numCols=imSize; xCenter = numCols/2...

2일 전 | 0

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Decompose image into the sum of two images
Hint: you need to segment the image (perhaps by thresholding), allSquares = grayImage > 0; or from imbinarize(). Then use r...

2일 전 | 1

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답변 있음
Filling Rand matrix with specific numbers
I don't know that your code is clumsy. Sometimes if there are just a small handful of things to do it's often more readable and...

2일 전 | 1

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How to remove square shape part from image and detect the bubbles around squares?
OK Suresh, here's the full demo. It's exceptionally well commented so it's self explanatory. Adapt as needed: % Demo to mask ...

2일 전 | 1

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How to remove square shape part from image and detect the bubbles around squares?
Assuming the square is in the same location for every image, you can simply create a mask with poly2mask() and then mask it away...

3일 전 | 0

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Dot indexing is not supported for variables of this type. GUI issues.
You do not have a static text label or edit text box on your GUI with the name ("tag") InsertNumberofPaymentsHere.

3일 전 | 0

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Error message for polynomial interp
You're missing a closing right parenthesis.

3일 전 | 1

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creating multiple circles inside an array
Here is a little demo you might find useful. It determines which, if any, circles overlap/intersect: % Demo to create some cir...

3일 전 | 0

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답변 있음
creating multiple circles inside an array
Search the forum for the tag "circle packing" and you'll find code. CLICK HERE

4일 전 | 0

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How to map a vector to a colourmap ?
Do you mean where the marker color is the color taken from the "energy" array, like this: % Define our data. theta = linspace(...

4일 전 | 1

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How to normalize GLCMs created for four offsets?
Regarding your last comment above . . .It told you it's not integer and it needs integer. So, cast it to integer: uint8Image =...

4일 전 | 0

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Adaptive background Subtraction Algorithm
See several attached video processing demos. Also see my File Exchange.

4일 전 | 0

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How to extract features of videos
I extract some features in the attached demo. I compute a dynamic background from the last few frames and subtract it to get th...

5일 전 | 0

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Get intersection of two segments
Are the lines in rows or columns? Anyway, just take a line from each and subtract them and see if the signs are all the same: ...

5일 전 | 0

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Corona Virus - Our college campus is closed and moving to all online
We cannot do that. We are just a community of users like you. You'd have to discuss that with the Mathworks directly. They ca...

5일 전 | 0

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Not able to get accurate true positive (TP), true negative (TN), false positive (FP) and false negative(FN) values in image watermarking
Of course. It all depends on how you do your watermark extraction on the tampered image. For example if you merely subtracted ...

5일 전 | 0

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답변 있음
Using convn with pictures and kernel.
I don't understand. If you have a 6x6 image, even though there are 20 independent pictures them stacked into a 3-D array, how a...

6일 전 | 0

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Subroutines stops at input
Hint: s = 'ice cream is good' % Find out which elements are letters. letterIndexes = isstrprop(s,'alpha') % Extract letters ...

6일 전 | 0

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Why can't I write this row vector?
Define x somehow before that line, like these examples x = magic(3) x = rand(3) x = randi(100, 3, 3) or whatever.

6일 전 | 1

답변 있음
Using a variable in a function before it is defined.
Why do you think it should know what "i" is at that point in your code? You never said what i is, so it's undefined. I think y...

6일 전 | 0

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