Steve on Image Processing

Concepts, algorithms & MATLAB

Binary image area filtering

Posted by Steve Eddins,

area_filtering_06

In my August 8 post about Pokemon Go (and I still can't quite believe that I did that), one of the processing steps was finding the centroid of the largest object in a binary image.... read more >>

Pokémon Go meets MATLAB

Posted by Steve Eddins,

Until about two weeks ago, I had given absolutely no thought to the possibility of a relationship between MATLAB and Pokémon Go, this summer's worldwide mobile gaming phenomenon. But then I heard about someone using some basic image processing techniques to hack the game by automating the search for PokéStops.... read more >>

Friday MATLAB Mystery 3

Posted by Steve Eddins,

mystery-item-05-aug-2016

There are some MathWorkers who like to try to stump each other with pictures of "mystery items." For example, last week someone posted the following picture and challenged others to guess what it is:... read more >>

Image binarization – Otsu’s method 2

Posted by Steve Eddins,

binarization_otsu_method_08

In my 16-May-2016 post about image binarization, I talked about the new binarization functions in R2016a. Today I want to switch gears and talk about Otsu's method, one of the algorithms underlying imbinarize.... read more >>

Image binarization – new R2016a functions 3

Posted by Steve Eddins,

binarization_part2_06

In my 09-May-2016 post, I described the Image Processing Toolbox functions im2bw and graythresh, which have been in the product for a long time. I also identified a few weaknesses in the functional designs:... read more >>

Image binarization – im2bw and graythresh 2

Posted by Steve Eddins,

binarization_part1_featured_image

As I promised last time, I'm writing a series about functional designs for image binarization in the Image Processing Toolbox. Today I'll start by talking about im2bw and graythresh, two functions that have been in the product for a long time.... read more >>

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