Published

Bit slices
Blog reader Kathirvel wanted to know more about the MATLAB default image and how it was formed. I'll show...

19 years ago

Published

Nonflat grayscale dilation and erosion
Blog reader Alex asked for an explanation of nonflat grayscale dilation and erosion. In the most commonly-used form...

19 years ago

Published

Software development tools for engineers
Back in September I wrote that I would be attending the IEEE International Conference on Image Processing this month, and...

19 years ago

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Getting MATLAB code from blog postings
Back in January, I wrote that I was using the MATLAB publish feature to generate some of my blog posts. Since then, I've...

19 years ago

Published

Hough transform coordinate system
Reader JP asked me about my recent blog post on the Hough transform. Specifically, she wanted to know exactly how the...

19 years ago

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The Story Behind the MATLAB Default Image
Image display was added in version 4 of MATLAB, sometime around 1990. Many observant users noticed that the...

19 years ago

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Separable convolution
The sci.image.processing newsgroup had a discussion this week on separable filters, which reminded me that...

19 years ago

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Dilation, erosion, and the morphological gradient
The morphological operator dilation acts like a local maximum operator. Erosion acts like a local minimum...

19 years ago

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Unusual red-eye reduction technique
I was amused by this portion of a product description for a digital camera. I'm not sure that this is what I would expect...

19 years ago

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Use makehgtform for 3-D rotation
Developer Mike G. read my recent post about three-dimensional image rotation and suggested that users might want to use...

19 years ago

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ICIP 2006
The thirteenth International Conference on Image Processing (ICIP) is next month in Atlanta, Georgia. I'll be attending to...

19 years ago

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R2006b
If you look closely at the bottom of my last post, you'll see "Published with MATLAB 7.3" in small gray text. Yep, the...

19 years ago

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Showing image pixels associated with a Hough transform bin
Someone here recently puzzled over the output of the Hough transform functions in the Image Processing Toolbox. The...

19 years ago

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Responses to reader challenge
Thanks to Kimo Johnson and Perttu Ranta-aho for responding to my custom spatial transformation challenge. ...

19 years ago

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Spatial transformations: Three-dimensional rotation
Blog reader Stephen N., who's been following my posts about spatial transformations, asked me last week how to...

19 years ago

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Discrete cosine transforms, JPEG, and software compatibility
Software compatibility is a tricky subject. No one likes it when an incompatible change occurs in a software...

19 years ago

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Reader challenge: Custom spatial transformations
Were you intrigued by the custom spatial transformations I showed last week? Here's a challenge for you: Create a sample...

19 years ago

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Spatial transformations: Defining and applying custom transforms
Blog reader David A. asked me a while back about how to transform an image based on some mathematical function. For...

19 years ago

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Spatial transformations: Controlling the input and output grids with imtransform
The function imtransform has several optional parameters that allow you to fine-tune its behavior. Today's...

19 years ago

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Spatial transformations: Handling noninvertible cases
I've written previously about how imtransform uses inverse mapping to compute the input-space location corresponding to...

19 years ago

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GUI programming questions
I regularly receive blog comments and direct e-mail asking for help with writing image processing GUIs in MATLAB. That's...

19 years ago

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Seen on the web: MATLAB example for tracing and measuring skin lesions
I saw an interesting MATLAB based image processing application on a melanoma skin cancer blog recently. The example,...

19 years ago

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Input from tech support
Recently, our application support engineers gave a series of presentations to development groups. These presentations...

19 years ago

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Spatial transformations: Translation confusion
The last time I wrote about spatial transformations, I explained that imtransform uses the function findbounds to...

19 years ago

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Multidimensional interpolation with integer input
A customer asked me last week how to do multidimensional interpolation with integer inputs. The MATLAB function interpn...

19 years ago

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More from CGIV
More bits and pieces from CGIV today, typed in while watching England and Sweden battle it out on the telly... it's...

19 years ago

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Hue shifts near the L*=0 axis
At the European Colour in Graphics, Imaging, and Vision conference today, I took a tutorial called "Transforms for...

19 years ago

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European colour
Next week I'll be in the UK. On Monday I'll be attending the International Color Consortium's DevCon 2006 at the...

19 years ago

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Spatial transformations: findbounds
I've written previously about how Image Processing Toolbox uses inverse mapping to implement spatial transforms. In...

19 years ago

Published

Determining point positions in MRI peg phantom
Blog reader Jonathan from St. Jude Children's Research Hospital sent me an image derived from an MRI peg phantom:bw...

19 years ago