Steve on Image Processing

Color Thresholder App in R2014a 7

Posted by Steve Eddins,

I had way too much fun this morning playing with the new Color Thresholder app (new in R2014a) in the Image Processing Toolbox, so I wanted to show it to you. ... read more >>

Timing the FFT 3

Posted by Steve Eddins,

I've seen two questions recently about the speed of the fft function in MATLAB. First, a tech support question was forwarded to development. The user wanted to know how to predict the computation time for an FFT of a given length, N. This user was interested in values of N... read more >>

R2014a shipped! (And the developer says, “Wait, what?”) 11

Posted by Steve Eddins,

At MathWorks, the software developers' sense of calendar time is SO out of sync with the real world. In the real world, MathWorks shipped R2014a, the first of our two annual releases, last week. In the developers' world, R2014a is old news. Right now all the developers are heads-down and... read more >>

regionprops, tables, and struct2table 7

Posted by Steve Eddins,

Today I was talking to Spandan (a regular guest blogger here) about the history of the Image Processing Toolbox function regionprops. This function is a widely-used work-horse of the toolbox. Many of my blog posts here have shown it in practice.... read more >>

Update to TopoToolbox

Posted by Steve Eddins,

In 2007 I did a series of blog posts on developing MATLAB algorithms for a topological measurement called upslope area, a measurement related to digital elevation models (DEMs). The upslope area of a point (pixel) is the total area on the terrain above that point that drains through it. I... read more >>

These postings are the author's and don't necessarily represent the opinions of MathWorks.