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Steve Eddins


Last seen: 2 days ago

MathWorks

708 total contributions since 2006

MATLAB user since 1987. MathWorker since 1993. Amateur French horn player. MATLAB design and development, image processing algorithms.

Image processing blog: https://blogs.mathworks.com/steve/

Deep learning blog: https://blogs.mathworks.com/deep-learning

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Answered
How do I get the actual mesh Vertices and Triangles generated by the spiralRectangular function in the Antenna Tool Box?
I don't see a documented interface for this, but you can find the patch object produced by the show method and then get the face...

2 days ago | 0

Answered
Disoriented Matlab output plot
Try using a regular text object instead, like this: text(0,41.75,string(0),'FontSize',8,'HorizontalAlignment','center')

2 days ago | 0

Solved


Project Euler: Problem 3, Largest prime factor
The prime factors of 13195 are 5, 7, 13 and 29. What is the largest prime factor of the number being input, input might be ui...

3 days ago

Solved


Project Euler: Problem 2, Sum of even Fibonacci
Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 te...

3 days ago

Answered
Log axis with percentage tick labels
From what I can tell, the ruler object ignores the TickLabelFormat property (which is set by ytickformat) when the Scale is 'log...

3 days ago | 0

Answered
Help calling my basic function
You must use the filename as the function name when calling your function. MATLAB will not pay attention to the "n" inside the f...

3 days ago | 1

Answered
Why does evaluating a function with symbolic variables take so much longer than with a double?
When MATLAB performs arithmetic on normal numeric values, which are represented internally as double-precision floating-point nu...

4 days ago | 2

| accepted

Published


Making Color Spectrum Plots – Part 3
Recently, I've been explaining how I made this plot, which is from DIPUM3E (Digital Image Processing Using MATLAB, 3rd...

1 month ago

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Published


What is 0.01?
I was looking at these two numbers the other day:... read more >>

2 months ago

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Published


Making Color Spectrum Plots – Part 2
It was a while ago now, but on April 27 I started explaining how I made this plot, which is from DIPUM3E (Digital Image...

2 months ago

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Submitted


MATLAB Color Tools
MATLAB Color Tools is an experimental collection of MATLAB functions related to color science computation and visualization.

2 months ago | 12 downloads |

Published


Making Color Spectrum Plots – Part 1
The new edition of Digital Image Processing Using MATLAB (DIPUM3E) contains a number of MATLAB functions related to color,...

5 months ago

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Published


Geometric Transformation of Points – Getting Started
I like to think of geometric transformations of images (stretching, shrinking, rotating, etc.) by starting with the...

6 months ago

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Published


How to Display Color Swatches
When working on the "Color Image Processing" chapter of DIPUM3E, I found myself often wanting to display square blocks (or...

7 months ago

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Published


Digital Image Processing Using MATLAB, 3rd edition
The 3rd edition of Digital Image Processing Using MATLAB (DIPUM3E) has just been published, at long last. The new edition...

7 months ago

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Published


Treble clefs, Unicode, SVG, strings, Bézier curves, kron, implicit expansion, and polyshape
Today I will show you how I plotted this treble clef symbol in MATLAB:... read more >>

8 months ago

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Published


How to Write Animated PNG (APNG) Files from MATLAB
Today, I'm writing about how to create animated PNG (APNG) files, such as this one:... read more >>

9 months ago

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Submitted


Animated PNG (APNG) Writer
Create APNG (animated PNG) files

9 months ago | 5 downloads |

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Published


How to Go a Little Crazy with Graphics Titles
The title function is the third most commonly-used function in my 13 years of writing this blog, after imshow and imread....

10 months ago

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Published


How to Overlay a Color on an Image Using a Mask
In my first year of writing this blog (2006!), I showed how to overlay a color onto an image based on a mask. This was the...

10 months ago

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Submitted


Image overlay
Overlay a binary mask onto an image using a specified color

10 months ago | 22 downloads |

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Submitted


Zone plate test image
MATLAB function to create a zone plate test image

10 months ago | 5 downloads |

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Submitted


Penrose Rhombus Tiling
MATLAB functions for Penrose tiling

10 months ago | 4 downloads |

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Submitted


Pixel Grid
MATLAB function that superimposes a grid of pixel edges on an image

10 months ago | 3 downloads |

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Published


How to Read and Visualize a DICOM Volume
Earlier this year, I learned something about DICOM datasets that surprised me. I had downloaded a Head-Neck CT+PET study,...

10 months ago

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Published


Guess the functions and get a t-shirt
Of all the MATLAB or MathWorks toolbox functions that have been mentioned in this blog since 2006, imshow and imread have...

11 months ago

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Published


How to display images with bilinear interpolation and antialiasing
Note: this blog post describes an image display feature that is new in R2019b. You can download this release from...

11 months ago

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Published


The tool builder’s gene (or how to get a job at MathWorks)
In my second year of grad school (1987-88), my thesis advisor asked me to develop some PC-based digital signal...

11 months ago

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Published


Using the Color Threshold app again
Back in the summer I had another chance to use the Color Thresholder, a very nice app that's in the Image Processing...

12 months ago

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Published


Documenting performance improvements
I recently noticed a change in the way we write some of our product release notes, and I wanted to mention it to you.......

12 months ago

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