For the next few days, I'll be at the IEEE International Conference on Image Processing in San Antonio, Texas. If you're there, stop by the MathWorks table and say hi. PS. I've discovered... read more >>

Sharp-eyed readers of my previous post might have noticed the "Published with MATLAB® 7.5" footer at the end of the example. That's right, as Loren posted earlier this week, R2007b is now... read more >>

I saw an application recently where someone wanted to handle NaNs in an image differently depending on whether they were "interior." In other words, a set of connected NaN pixels... read more >>

One the measurements provided by regionprops is 'Centroid'. Here's an example of labeling binary objects, computing the centroid of each object, and plotting the centroid location on top... read more >>

Earlier in this series I have discussed the problem of plateaus. Specifically, how do you assign a flow direction to a DEM pixel that has no downhill neighbors? I proposed in part 5 that the... read more >>

The functions bwlabel and regionprops are very useful for measuring the properties of shapes in a binary image. There are documentation examples and product demos showing how to do this,... read more >>

I'd like to introduce guest blogger Stan Reeves. Stan is a professor in the Department of Electrical and Computer Engineering at Auburn University. He serves as an associate ... read more >>

About twelve years ago, I was implementing the algorithm that became roifill in the Image Processing Toolbox. In this algorithm, a specified set of pixels is replaced (or filled in) such that... read more >>

After my last upslope area post, I decided that I had enough of the algorithm details worked out to produce a set of working M-files. Although I have a few more posts to go, I've already uploaded... read more >>

So far in this series I've talked about calculating pixel flow directions and handling plateaus, but I haven't yet discussed the actual upslope area calculation. The Tarboton paper... read more >>