A couple of weeks ago, Cleve wrote a post about George Forsythe, Cleve's "thesis advisor, colleague, and friend."In that post, Cleve showed some MATLAB code to load in and display a 1964 picture of... 続きを読む >>

On my list of potential blog topics today I saw just this cryptic item labeled dftmtx. Hmm, the MATLAB dftmtx function. But have I written about this function before? I better double-check by... 続きを読む >>

Last week I talked about the so-called Jähne test pattern and how I found a description of it in Practical Handbook on Image Processing for Scientific Applications, by Bernd Jähne, CRC... 続きを読む >>

Earlier this week I posted a summary of posts from the beginning of this blog, including my January 13, 2006 post on generating test images. Today I want to revisit one of the examples from that... 続きを読む >>

Blog reader Mutlu recently asked me this question: "I have two images - one contains class labels (one of 1 or 2) and one containing image segment (region) unique IDs. I am ... 続きを読む >>

Last week I showed this picture of M&Ms on my desk, and I used it to raise some vague questions about the definition of the color green. Today I'll use this picture as an opportunity... 続きを読む >>

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... 続きを読む >>

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... 続きを読む >>

Many of you were onto me immediately last week. I asked you to estimate the frequency of the sampled cosine signal below, and readers quickly chimed in to guess that this question was... 続きを読む >>

Digital Image Processing Using MATLAB has three coauthors, and we are each responsible for different aspects of writing and other book-related activities. One of my responsibilities is to keep... 続きを読む >>