I was looking at the image below on a web page recently and I decided to extract the locations of all the dots. I thought the procedure might make a nice little end-of-the-week how-to... 続きを読む >>

Earlier this week I wrote about the lists I keep of MATLAB and Image Processing Toolbox changes that might be relevant to the material in Digital Image Processing Using MATLAB. I've been keeping... 続きを読む >>

I wrote last week about new features in R2009a related to connected component labeling. There are two new functions, bwconncomp and labelmatrix, as well as additional syntaxes for an existing... 続きを読む >>

Last week I wrote about our desire to reduce the memory used by bwlabel. I also wrote about other issues we hoped to address: The... 続きを読む >>

One of the changes we made to the Image Processing Toolbox for R2009a was partially inspired by comments received on this blog. Specifically, several blog readers complained about the... 続きを読む >>

I recently heard a MathWorks application engineer (hi, Brett!) say that a short little paragraph in the regionprops documentation was very "powerful." Here it is: The function ismember... 続きを読む >>

Transparent graphics objects can be used effectively to visualize image processing concepts. Two particularly useful techniques are: Highlighting image... 続きを読む >>

Several questions I've seen about bwlabel are about finding the correspondences between object labels in two images. In other words, if a particular pixel is in the foreground in two... 続きを読む >>

The three most common questions I've been hearing about bwlabel, which is used for labeling connected components in a binary image, are about Search order ... 続きを読む >>

I've received several questions over the past months about the search order for the function bwlabel and whether it can be changed. Today's post discusses the search-order issue, how useful it... 続きを読む >>