Steve on Image Processing with MATLAB

Image processing concepts, algorithms, and MATLAB

Posts 61 - 70 of 71

Results for: 2007

Computing distance using image file information 25

Patrick asked for an example on how to compute distances between objects based on resolution information stored in a file. The TIFF format
is one that can store resolution information, and the... read more >>

Connected component labeling – Part 2 5

In this series I'm discussing different ways to compute the connected components of a binary image. Before I get into specific
algorithms, though, I need to touch briefly on the notion of... read more >>

What happened to isgray, isind, isbw, and isrgb? 13

In a blog comment recently, Rob asked about what happened to isrgb. When you run this function, it issues a warning about being obsolete. Rob asked "What were the toolbox developers... read more >>

Connected component labeling – Part 1 9

Several people have asked recently about how bwlabel works, so I plan to write about it here during the next several weeks.
bwlabel implements an operation known as connected component labeling, or... read more >>

R2007a 6

As Loren posted yesterday in her Art of MATLAB blog, the R2007a release is available. Readers of this blog might be interested in the minor upgrades the Image Processing Toolbox, the Image... read more >>

ROIPOLY – rectangular regions and logical indexing 26

Several readers commented on my recent roipoly and poly2mask posts, and I wanted to follow up on a couple of issues they raised. The first issue is a common point of confusion about ... read more >>

Costas arrays 17

Last week I wrote about a possible modification to poly2mask that would estimate how much of each pixel is contained within a polygon. The idea was to use a regular 5-by-5 subgrid and ... read more >>

Antialiased polygon scan conversion: Are you interested? 19

In December I wrote several blogs about the algorithm underlying the poly2mask function. Basically, the algorithm uses a 5-by-5 subpixel grid and lays out the polygon along the edges of the... read more >>

Seen on the web 1

Item 1: Digital image correlation for strain measurement The iMechanica web site has an item on a MATLAB tool that applies digital image correlation techniques for measuring material... read more >>

A Year of Blogging 50

I started this blog on image processing and MATLAB about a year ago. Shortly afterward, another blogger discovered it and told the world that a blog solely about MATLAB and image processing was... read more >>

Posts 61 - 70 of 71