I'd like to introduce Brett Shoelson as guest blogger for today. Many of you already know Brett from his work on the File Exchange Pick of the Week blog, or his posts on the... 更多内容 >>

Last week I wrote about a user's request to perform connected-component labeling with an unusual connectivity definition: [1 0 1 0 1]This definition, which is not supported by Image... 更多内容 >>

A blog reader asked me recently for an enhancement related to connectivity. I found the request a bit surprising, and I want to explore it with you in the this post and the next. ... 更多内容 >>

A reader asked in a blog comment recently why a vertical line (or edge) shows up in the Fourier transform of an image as a horizontal line. I thought I would try to explain this using the... 更多内容 >>

In a recent post I demonstrated the use of bwdist (binary image Euclidean distance transform) to perform isotropic dilation. This was inspired by something that Brett asked me about. ... 更多内容 >>

Thanks to Steve Lord I just learned that documentation for previous MathWorks releases is now available online. This is something I know many of you have asked about. Just hop over to the... 更多内容 >>

Brett recently asked me about an image processing problem. One step in the problem involved finding out which pixels are within a certain distance of the foreground in a binary image. We... 更多内容 >>

The Image Processing Toolbox function regionprops gives you measurements of shape-based measurements of image regions. It's pretty useful, and I have shown many examples of it on this... 更多内容 >>

One of the discrete-time Fourier transform properties that many people learn is that if a sequence is conjugate symmetric, , then the Fourier transform is real. Therefore it... 更多内容 >>

I've been bothered recently by a MATLAB terminology question: How should we describe the dim argument in functions such as sum? The documentation for sum says: B = sum(A,dim) sums along... 更多内容 >>