https://steveeddins.com/blog/matlab/ Recent posts from Harmonic Notes on MATLAB and Image Processing Hugo -- gohugo.io en-us Wed, 17 Dec 2025 00:00:00 +0000 https://steveeddins.com/blog/matlab/matlab-image-display-history-part-4/ Wed, 17 Dec 2025 00:00:00 +0000 https://steveeddins.com/blog/matlab/matlab-image-display-history-part-4/ The challenge of displaying images in MATLAB when your early 1990s computer monitor just didn't have enough pixels. https://steveeddins.com/blog/matlab/improved-registration-algorithm-for-imregcorr/ Thu, 16 Oct 2025 00:00:00 +0000 https://steveeddins.com/blog/matlab/improved-registration-algorithm-for-imregcorr/ Substantial improvements for function IMREGCORR, which registers image pairs using similarity, rigid, and translation transformations. https://steveeddins.com/blog/matlab/making-two-state-map/ Sun, 21 Sep 2025 00:00:00 +0000 https://steveeddins.com/blog/matlab/making-two-state-map/ Using MATLAB and Mapping Toolbox to make a simple map of two states with some point and path landmarks. https://steveeddins.com/blog/matlab/lake-image-example/ Sun, 14 Sep 2025 00:00:00 +0000 https://steveeddins.com/blog/matlab/lake-image-example/ Creating a two-color thumbnail lake image from original GIS image with extraneous details. https://steveeddins.com/blog/matlab/matlab-image-display-history-part-3/ Wed, 03 Sep 2025 00:00:00 +0000 https://steveeddins.com/blog/matlab/matlab-image-display-history-part-3/ Image Processing Toolbox version 1, the first appearance of of IMSHOW, and the introduction of more image display models. https://steveeddins.com/blog/matlab/matlab-image-display-history-part-2/ Mon, 04 Aug 2025 00:00:00 +0000 https://steveeddins.com/blog/matlab/matlab-image-display-history-part-2/ MATLAB 4; Handle Graphics and its influence on modern MATLAB design; the original IMAGE object and its strengths and limitations; the first MATLAB default image. https://steveeddins.com/blog/matlab/history-image-display-matlab-part-1/ Sat, 26 Jul 2025 00:00:00 +0000 https://steveeddins.com/blog/matlab/history-image-display-matlab-part-1/ A brief summary of the early years of digital image processing, and of early versions of MATLAB before 1990. https://steveeddins.com/blog/matlab/motivations-for-sharing-code/ Mon, 21 Jul 2025 00:00:00 +0000 https://steveeddins.com/blog/matlab/motivations-for-sharing-code/ My thoughts on a MATLAB Discussions thread about reasons that researchers might benefit from actively sharing their code. https://steveeddins.com/blog/matlab/text-processing-and-directed-graphs/ Sun, 25 May 2025 00:00:00 +0000 https://steveeddins.com/blog/matlab/text-processing-and-directed-graphs/ Turning a nested Markdown list into a directed graph in MATLAB. https://steveeddins.com/blog/matlab/tool-builders-gene-update/ Wed, 16 Apr 2025 00:00:00 +0000 https://steveeddins.com/blog/matlab/tool-builders-gene-update/ I was fortunate to realize quickly that academia wasn't the best place for me and that I would be much happier at a place like MathWorks—because I have the gene. https://steveeddins.com/blog/matlab/imview-v2/ Thu, 20 Mar 2025 00:00:00 +0000 https://steveeddins.com/blog/matlab/imview-v2/ The `imview` function, a new image display function intended to replace `imshow`, has been updated and is ready for wide use. https://steveeddins.com/blog/matlab/changing-some-matlab-plotting-defaults/ Mon, 10 Mar 2025 00:00:00 +0000 https://steveeddins.com/blog/matlab/changing-some-matlab-plotting-defaults/ Revisiting one of my most popular MATLAB Central blog posts, about changing default plotting behavior. https://steveeddins.com/blog/matlab/matlab-central-community-advisory-board/ Sat, 15 Feb 2025 00:00:00 +0000 https://steveeddins.com/blog/matlab/matlab-central-community-advisory-board/ Another way to be retired but still involved. https://steveeddins.com/blog/matlab/update-regarding-add-on-versioning/ Fri, 14 Feb 2025 00:00:00 +0000 https://steveeddins.com/blog/matlab/update-regarding-add-on-versioning/ A MathWorker provides an update regarding plans for add-on versioning. https://steveeddins.com/blog/matlab/issues-with-add-on-versioning/ Thu, 13 Feb 2025 00:00:00 +0000 https://steveeddins.com/blog/matlab/issues-with-add-on-versioning/ Challenges with making one File Exchange submission dependent on another one. https://steveeddins.com/blog/matlab/story-of-timeit/ Wed, 15 Jan 2025 00:00:00 +0000 https://steveeddins.com/blog/matlab/story-of-timeit/ The function `timeit` started out in an engineering textbook about image processing using MATLAB. https://steveeddins.com/blog/matlab/imview-a-new-image-display-function/ Thu, 12 Dec 2024 00:00:00 +0000 https://steveeddins.com/blog/matlab/imview-a-new-image-display-function/ A new image display function intended to replace `imshow`. https://steveeddins.com/blog/matlab/function-syntax-design-conundrum/ Mon, 02 Dec 2024 00:00:00 +0000 https://steveeddins.com/blog/matlab/function-syntax-design-conundrum/ I love using the arguments block, but it doesn't handle this use case well. https://steveeddins.com/blog/matlab/pixel-grid-update/ Wed, 30 Oct 2024 00:00:00 +0000 https://steveeddins.com/blog/matlab/pixel-grid-update/ As it turns out, there are several ways to draw thousands of line segments with just one "line" object. https://steveeddins.com/blog/matlab/image-zoom-pan/ Thu, 29 Aug 2024 00:00:00 +0000 https://steveeddins.com/blog/matlab/image-zoom-pan/ In today's world of display devices with a wide range of resolutions, this notion of a virtual pixel has evolved to help interface and website designers achieve reasonably consistent results on different devices. https://steveeddins.com/blog/matlab/cris-luengo-on-library-design/ Tue, 13 Aug 2024 00:00:00 +0000 https://steveeddins.com/blog/matlab/cris-luengo-on-library-design/ Cris Luengo discusses how the "everything is a class" design philosophy affects the complexity of the resulting client interfaces. https://steveeddins.com/blog/matlab/code-step-through/ Fri, 17 May 2024 00:00:00 +0000 https://steveeddins.com/blog/matlab/code-step-through/ Although I was certainly happy to have found the bug before the feature shipped, I was disappointed to have found it fairly late in the development process. https://steveeddins.com/blog/matlab/fft-zero-padding-strategies-computing-transform-length/ Tue, 14 May 2024 00:00:00 +0000 https://steveeddins.com/blog/matlab/fft-zero-padding-strategies-computing-transform-length/ For 1-D applications with very long vectors, the time required to compute the transform size could be significant. https://steveeddins.com/blog/matlab/fft-zero-padding-strategies-small-primes/ Thu, 02 May 2024 00:00:00 +0000 https://steveeddins.com/blog/matlab/fft-zero-padding-strategies-small-primes/ "The standard FFTW distribution works most efficiently for arrays whose size can be factored into small primes (2, 3, 5, and 7), and otherwise it uses a slower general-purpose routine." https://steveeddins.com/blog/matlab/fft-zero-padding-strategies-intro/ Thu, 25 Apr 2024 00:00:00 +0000 https://steveeddins.com/blog/matlab/fft-zero-padding-strategies-intro/ FFT-based convolution can be performed faster by using a different zero-padding strategy than what is commonly used. https://steveeddins.com/blog/matlab/initialize-matlab-toolbox/ Wed, 10 Apr 2024 00:00:00 +0000 https://steveeddins.com/blog/matlab/initialize-matlab-toolbox/ A utility function for organizing files in a new MATLAB toolbox according to recommended best practices https://steveeddins.com/blog/matlab/welcome/ Wed, 03 Apr 2024 00:00:00 +0000 https://steveeddins.com/blog/matlab/welcome/ Welcome to Matrix Values, a new blog by Steve Eddins about MATLAB, image processing, and other technical topics.