I was looking at these two numbers the other day:$0.01$$\frac{5764607523034235}{576460752303423488}$It turns out they are very close, differing only by about 5 parts in a quadrillion.A tech support... 続きを読む >>

It was a while ago now, but on April 27 I started explaining how I made this plot, which is from DIPUM3E (Digital Image Processing Using MATLAB, 3rd ed.):... 続きを読む >>

The new edition of Digital Image Processing Using MATLAB (DIPUM3E) contains a number of MATLAB functions related to color, color calculations, and color visualization. I wrote about functions for... 続きを読む >>

When working on the "Color Image Processing" chapter of DIPUM3E, I found myself often wanting to display square blocks (or swatches) of color, like this: Eventually, I wrote a function,... 続きを読む >>

Today I will show you how I plotted this treble clef symbol in MATLAB: My discovery and implementation process for doing this involved Unicode characters, SVG files, string processing, Bezier curves,... 続きを読む >>

Today, I'm writing about how to create animated PNG (APNG) files, such as this one: I first wrote about APNG files last February. An APNG file is a valid PNG image file that uses file metadata in a... 続きを読む >>

The title function is the third most commonly-used function in my 13 years of writing this blog, after imshow and imread. You have probably all used this function many times.... 続きを読む >>

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 example I gave back then: I wrote a function called imoverlay to handle all... 続きを読む >>

Earlier this year, I learned something about DICOM datasets that surprised me. I had downloaded a Head-Neck CT+PET study, and I wanted to create a volume array in MATLAB. I tried to do this the hard... 続きを読む >>

Of all the MATLAB or MathWorks toolbox functions that have been mentioned in this blog since 2006, imshow and imread have appeared the most. As in last week's post, they often appear together,... 続きを読む >>