Computers that recognise images. A hard AI Problem. 358 Image Recognition 2012-02-09T05:00:21 Neal Pointer barry.david.adams@googlemail.com Steve on Image Processing 2012-02-07T00:28:31

I want to let readers know that I'm experimenting with a new comment policy. I started this blog at the beginning of 2006. At first, I left comments open and only filtered out obvious spam. Soon, though, I found that I couldn't handle the volume of comments. Also, most comments were off-topic, which I thought [...]

ae21d26695f5abbb7ac226038711e9ef Steve on Image Processing 2012-01-31T18:59:38

Last week I happened to come across a summary I wrote after completing my first month at MathWorks. This was quite a while a go ... December 1993! I was hired to take over development of the Image Processing Toolbox, which had just shipped version 1.0. From the summary, I see that I spent a [...]

68ad631f6d4072116b62ab273a3dea19 Steve on Image Processing 2012-01-26T04:40:47

This week I came across some files I wrote about 16 years ago to compute Hilbert curves. A Hilbert curve is a type of fractal curve; here is a sample: I can't remember why I was working on this. Possibly I was anticipating that 16 years in the future, during an unusually mild New England [...]

a5b7f384334a6302306d4521dc0d219b Steve on Image Processing 2012-01-13T20:50:33

Much of the information I posted in this blog years ago is still useful today. Image processing theory hasn't been completely been overturned since then, and I'm still talking about MATLAB after all. For the benefit of readers who have joined the party more recently, I will occasionally recap the useful bits that I posted [...]

b9eb9a482bcf78d0f11f27918c05a4a7 Steve on Image Processing 2011-12-28T00:00:45

Blog reader Mike posed the following question recently: If you have a bunch of point locations (for example, object centroids), how you make a binary image containing just those points? For example, consider this image:bw = imread('text.png'); imshow(bw, 'InitialMagnification', 200) How can we make an image like this, where the dots are located at the [...]

e826d8d9335f4948071ed1494a4dfbe5 Steve on Image Processing 2011-12-23T00:00:31

Blog reader Asadullah posted the following question last week on my old post about batch processing: I am trying to process some images by following the MATLAB demo. After getting the names of files when I try to see any of the files then it gives the error. The detail is as follows: >> fileFolder [...]

68e901583fa1eeca8bf9df196b62fc6e Steve on Image Processing 2011-12-21T13:20:18

For the past several weeks I've been writing about shortest-path problems in image processing: finding the shortest path between two points in an image, with and without constraints. Applications included the practical (path finding in a skeleton image) and fun (maze solving). Along the way, I've described: the basic idea of finding shortest paths by [...]

13ed7edd9e0b3a2ef9fd318c2db499d9 Steve on Image Processing 2011-12-13T07:00:45

In this post in the Exploring shortest paths series, I make things a little more complicated (and interesting) by adding constraints to the shortest path problem. Last time, I showed this example of finding the shortest paths between the "T" and the sideways "s" in this image: url = 'http://blogs.mathworks.com/images/steve/2011/two-letters-cropped.png'; bw = imread(url);And this was [...]

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