Steve Eddins

Retired, MathWorks

Last seen: 2 days ago | Active since 2011

Followers: 7 Following: 4

Retired from MathWorks in 2024 after 30 years of service. Can now be found at MATLAB Central, https://hornjourney.com, and https://matrixvalues.com. MathWorks career included image processing, toolbox development, MATLAB development and design, development team management, MATLAB design standards, Steve on Image Processing blog (https://blogs.mathworks.com/steve). Co-author of Digital Image Processing Using MATLAB (https://www.imageprocessingplace.com/DIPUM-3E/dipum3e_main_page.htm). French horn enthusiast, member of Concord Orchestra and Melrose Symphony, member of the board of Cormont Music and the Kendall Betts Horn Camp

Programming Languages:
MATLAB
Spoken Languages:
English
Pronouns:
He/him

Statistics

All

View badges

Feeds

Answered
Vertical blank space in tiledlayout compact
Trying setting TileSpacing to compact or tight. t=tiledlayout(2,2,'Padding','compact','TileSpacing','compact'); Or: t=tiledla...

4 months ago | 1

Answered
What is the Image Processing Toolbox Convention for Input to freqz2() ?
The convention for Image Processing Toolbox filter design functions is for the filter to be specified as a correlation kernel. T...

4 months ago | 1

| accepted

Answered
Axes in dialog box turn blank after calling imagesc in pushbutton callback
This is a strange one. The primary trigger for the unusual behavior is that the dialog function creates a figure with an empty c...

1 year ago | 2

| accepted

Answered
How to measure the correct circularity??
R2023a Update: Correcting regionprops Circularity Measurements That Are Greater Than 1.0 Image Processing Toolbox R2023a or Lat...

1 year ago | 1

Answered
How to detect circularity more accurately than 4*pi*A/P^2?
R2023a Update: Correcting regionprops Circularity Measurements That Are Greater Than 1.0 Image Processing Toolbox R2023a or Lat...

1 year ago | 3

Answered
regionprops circularity value >1 and 0 ?
R2023a Update: Correcting regionprops Circularity Measurements That Are Greater Than 1.0 Image Processing Toolbox R2023a or Lat...

1 year ago | 2

Answered
What is the easiest way to plot a circle annotation that maintains its shape regardless of figure dimensions?
You can position a circle with the center specified in axes data space by plotting a single point using a circle marker. You can...

2 years ago | 0

Answered
Saving figure in jpg with 600 dpi
The function exportgraphics generates and saves the image at the specified resolution, but it does not write resolution info int...

2 years ago | 4

| accepted

Answered
How to remove thin lines from the following image?
Try using the 3rd output of imfindcircles (metric) to distinguish the bigger droplets that aren't really circles.

2 years ago | 0

Answered
Convert RAW file (NEF) to CIELab
You could use the Image Processing Toolbox function raw2rgb to convert your raw NEF to sRGB values, and then you could use the r...

2 years ago | 0

Answered
How can I change a square wave into a sign wave with the graph provided?
Try removing the call to the sign function.

2 years ago | 0

Answered
label two objects that share part of the same boundary separately
m = [0,1,1,1,0;1,0,0,0,1;0,1,1,1,0;0,1,0,1,0;0,0,1,0,0] Fill the holes. From your example, it looks like the background connect...

2 years ago | 1

| accepted

Answered
Extracting bright spots on image
Try something like the following: Convert to grayscale (using rgb2gray). Use imextendedmax to pick out the bright peaks. You'l...

2 years ago | 1

| accepted

Answered
Saving to .mat without additional struct.
Try this: s = load("test2.mat"); aircraftdata = s.test;

2 years ago | 1

Answered
Find consecutive numbers below threshold using bwlabel
You could a hysteresis thresholding technique. First, threshold with a strict threshold, like your 0.5. Then, threshold with a s...

2 years ago | 0

| accepted

Answered
3D Plot shrinks one dimension when plotting Alphashape
The plot method for alphaShapes sets the data aspect ratio to [1 1 1]. When your code arrives at line 76, the data aspect ratio...

2 years ago | 0

Answered
Use Geographic Plots in tiledlayout without multiple axis
From the doc for nexttile: "nexttile creates an axes object and places it into the next empty tile of the tiled chart layout tha...

2 years ago | 0

| accepted

Answered
Is this another bug in imread(), or is this just a forum problem?
I can reproduce the problem in MATLAB Answers. The problem does not occur in MATLAB Online or in the desktop version. I'll let ...

2 years ago | 0

Answered
How to use "imregister" with "InitialTransformation"?
The value of InitialTransformation is supposed to be an affine3d object, not an imref3d object. See the doc description for the ...

2 years ago | 1

| accepted

Answered
WebREAD returns zeors when reading a GIF image
I got an array of zeros once using your code, but later I ran it again and got the expected image data. I quit MATLAB and launch...

2 years ago | 0

| accepted

Answered
imwarp function - bands during interpolation
First, let me run Arnaud's reproduction code and display the result so that everyone can see what we are talking about. Im1 = r...

2 years ago | 1

| accepted

Answered
Check for missing argument or incorrect argument data type in call to function 'head' - using Matlab R2020a
The function head is only defined for an input that is a table, a timetable, or a tall array. When trying to execute your code,...

2 years ago | 1

| accepted

Answered
Getting imaginary numbers for induction factors; I am getting imaginary number for my induction fact Aa and At but I am not using any sqrt to calculte. Thank you.
The acos function returns complex values if the inputs are outside the interval [-1,1]. Set a breakpoint on the line where you a...

2 years ago | 0

Answered
Filling one type of holes in a binary image
Based on your description of what you're trying to do, I ask the question: how are the semi-rectangular grains, which you want t...

3 years ago | 1

| accepted

Answered
How to remove extrapolated regions of a grid created with scatteredInterpolant?
You could try using an alpha shape to postprocess (mask) Z. Original code dx = 5; %grid step load('datapoints.mat'); F = s...

3 years ago | 1

| accepted

Answered
How to create a filling/shading between prediction bounds?
I can't completely run your code (s and Asiiimodel are missing), but I think that the black color in your patch result is from t...

3 years ago | 1

| accepted

Answered
FFT function is not functioning.
It seems that you may have tried to install MATLAB on a cloud drive (OneDrive). Or maybe you copied the application files into O...

3 years ago | 0

Answered
How do I transform this format 202007011030 (2020 07 01 10:30) into a readabel format?
I can imagine several ways to do this. Here is one. lines = readlines("Fehmarn_Wind_date.txt"); readlines was introduced in R2...

3 years ago | 0

Answered
ROI Trace boundaries result
I think some careful coordinate system tweaks will get you there. In many Image Processing Toolbox functions, pixels are treated...

3 years ago | 2

Answered
How is the 2D filter function used in this code?
For each element in A, filter2 essentially "slides" the filter F so that its center lines up with the element in A, and then it ...

3 years ago | 1

| accepted

Steve Eddins

Retired, MathWorks

Statistics

MATLAB Answers

MATLAB Answers

Cody

Cody

File Exchange

File Exchange

Cody

Cody

Cody

Cody

Cody

Cody

Feeds