Twice in the last month, I have read comments about certain problems being intrinsically hard to solve. In a fascinating book I just started to read called Algorithms to Live By, authors Brian... 続きを読む >>

In response to "MATLAB image display - autoscaling values with imshow," MATLAB Answerer Extraordinaire ImageAnalyst posted this comment:A discussion of the relationship and interplay of caxis(),... 続きを読む >>

I was looking at some documentation yesterday and saw something that I had forgotten. When you write a JPEG2000 image file using imwrite, you can specify a desired compression ratio.OK, that sounds... 続きを読む >>

A post in MATLAB Answers earlier this year reminded me that working on a discrete grid can really mess up apparently obvious notions about geometry.User Hg offered an image containing two... 続きを読む >>

MATLAB R2016a shipped earlier this month. It has a new feature that is a personal favorite: the Pause button. Have you ever sat watching MATLAB busily running your code, thinking that it was... 続きを読む >>

Last week I talked about displaying gray-scale and binary images. In that post, I showed how to control the grayscale range. For example, the call imshow(I,[0.4 0.6]) displays the matrix I as a... 続きを読む >>

In my previous posts (February 9, February 22, and February 29), I discussed the truecolor and indexed image display models in MATLAB, as well as the direct and scaled variations of indexed display. The Image Processing Toolbox has conventions for two additional image display models: grayscale and binary. These conventions are used by the MATLAB image display function imshow, which originated in the Image Processing Toolbox.... 続きを読む >>

In my last post on pixel colors, I described the truecolor and indexed image display models in MATLAB, and I promised to talk to soon about a third model. That model is the scaled indexed image, a... 続きを読む >>

ContentsMATLAB image display - truecolor and indexed imagesTruecolor imagesIndexed imagesMATLAB image display - truecolor and indexed imagesLast time I posed this question: How does MATLAB associate... 続きを読む >>

Here's a quick quiz for you: How bright are these pixel values?252 252 253 254 255 252 252 253 254 254 252 252 253 253 254 252 252 253 253 254 252 252 253 ... 続きを読む >>