Today I want to finish up my long-running discussion of Feret diameters. (Previous posts: 29-Sep-2017, 24-Oct-2017, 20-Feb-2018, and 16-Mar-2018.) Recall that the Feret diameter measures the... 続きを読む >>
Feret Properties – Wrapping Up 18
Steve on Image Processing with MATLABImage processing concepts, algorithms, and MATLAB
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結果: regionprops
Gray-scale pixel values in image regions
Before I dive into today's topic, I want to invite you to come back to the MATLAB Central Blogs page in a couple of weeks. Look for something new to appear related to deep learning.Earlier today, I... 続きを読む >>
Customizing REGIONPROPS With Your Own Measurements 12
I saw a presentation last month that mentioned a user request to have the ability to customize regionprops. That is, a user wanted to be able to add their own measurement to regionprops.Today, I'll... 続きを読む >>
Binary image area filtering
In my August 8 post about Pokemon Go (and I still can't quite believe that I did that), one of the processing steps was finding the centroid of the largest object in a binary image.That reminded me... 続きを読む >>
Pokémon Go meets MATLAB
Until about two weeks ago, I had given absolutely no thought to the possibility of a relationship between MATLAB and Pokémon Go, this summer's worldwide mobile gaming phenomenon. But then I... 続きを読む >>
Intersecting curves that don’t intersect 5
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 >>
Ellipse visualization and regionprops 2
A blog reader asked me recently how to visualize the ellipse-based measurements computed by regionprops. The reader wanted to superimpose the estimated ellipses on the image.To refresh your memory:... 続きを読む >>
regionprops, tables, and struct2table 7
Today I was talking to Spandan (a regular guest blogger here) about the history of the Image Processing Toolbox function regionprops. This function is a widely-used work-horse of the toolbox. Many of... 続きを読む >>
Automating the extraction of real data from an image of the data – part 2
I'd like to welcome back my fellow MATLAB Central blogger Brett Shoelson for the second in a three-part series on extracting curve values from a plot. You can find Brett over at the File Exchange Pick of the Week blog, or you can check out his many File Exchange contributions. -Steve... 続きを読む >>
Automating the extraction of real data from an image of the data – part 1 1
I'd like to welcome back my fellow MATLAB Central blogger Brett Shoelson for the first in a three-part series on extracting curve values from a plot. You can find Brett over at the File Exchange Pick of the Week blog, or you can check out his many File Exchange contributions. -Steve... 続きを読む >>