Here's a quick tip. A user question came in recently that involved a step of finding the pixels adjacent to foreground pixels in a binary image. Suppose you have a binary mask image,... 続きを読む >>

Loren wrote about the 2007 MATLAB World Tour in her Art of MATLAB blog recently. Several other MathWorks developers also attended some of the events. One message that they brought back... 続きを読む >>

[NOTE: After I originally wrote this post about handling plateaus, I discovered problems with the method, so I am no longer using it. I revisited the plateau issue in a later post. -SE] ... 続きを読む >>

In my previous upslope area post, I showed this graphic of pixel flow around North Pond in Milford, Massachusetts: Notice that pixels in the pond have no arrows. In fact, the... 続きを読む >>

In Part 2 of the upslope area series, I showed an M-file, pixelFlow, that could calculate a pixel's flow direction and magnitude according to the D-infinity method of Tarboton. Let's... 続きを読む >>

Patrick asked for an example on how to compute distances between objects based on resolution information stored in a file. The TIFF format
is one that can store resolution information, and the... 続きを読む >>

Several people have asked recently about how bwlabel works, so I plan to write about it here during the next several weeks.
bwlabel implements an operation known as connected component labeling, or... 続きを読む >>

Several readers commented on my recent roipoly and poly2mask posts, and I wanted to follow up on a couple of issues they raised. The first issue is a common point of confusion about ... 続きを読む >>

Several people have asked me recently how to plot some kind of shape on top of an image, so I thought I'd show the basic technique here. Essentially, you display the image, then call hold on,... 続きを読む >>

This is the final post in a series discussing the algorithm underlying Image Processing Toolbox functions poly2mask and roipoly. (See Part 1 and Part 2.) There are several desirable... 続きを読む >>