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Dilation algorithms—Introduction
Post updated on September 4 based on feedback from Cris Luengo's comment. Today I'm starting a new series covering...
plus de 17 ans il y a
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Image visualization using transparency
Transparent graphics objects can be used effectively to visualize image processing concepts. Two particularly useful...
plus de 17 ans il y a
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Filling small holes
A MATLAB user recently asked in the MATLAB newsgroup how to fill "small" holes in a binary image. The function imfill...
plus de 17 ans il y a
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Reading Massively Multipage TIFFs: An Update
Last fall I wrote about a complaint some MATLAB users had about reading certain kinds of TIFF files. Specifically, some...
plus de 17 ans il y a
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Image deblurring using regularization
I'd like to welcome back guest blogger Stan Reeves, professor of Electrical and Computer Engineering at Auburn...
plus de 17 ans il y a
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Opening by reconstruction
Today I want to show you a morphological operation called "opening by reconstruction." The normal morphological...
plus de 17 ans il y a
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Nonlinear operations using imfilter
Some nonlinear image processing operations can be expressed in terms of linear filtering. When this is true,...
plus de 17 ans il y a
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False-color visualization of binary image object sets
Today I want to demonstrate a useful technique to produce a false-color visualization of different sets of binary image...
presque 18 ans il y a
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Batch processing revisited
Here's a very common question we receive: "How do I process a set of image files in a directory?" ...
presque 18 ans il y a
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Performance optimization for applylut
I thought I would finish my discussion of applylut and makelut by describing a performance optimization we implemented for...
presque 18 ans il y a
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Digital Image Forensics
The June 2008 issue of Scientific American contains the article "Digital Image Forensics," by Hany Farid, Professor and...
presque 18 ans il y a
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Congratulations to Phoenix!
Congratulations to the Phoenix team for a successful landing and deployment on Mars! Mission leadership: University...
presque 18 ans il y a
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Lookup tables for binary image processing—Conway’s Game of Life
This is the third post about using lookup tables to process binary images. The first two posts were: ...
presque 18 ans il y a
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Lookup tables for binary image processing—makelut and applylut
This is the second in a short series on using lookup tables for binary image neighborhood operations. See the first...
presque 18 ans il y a
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Anti-aliased text in color
Over the past few years I've been fascinated to see the progress in making text look better on the screen. (I should...
presque 18 ans il y a
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Lookup tables for binary image processing
Today I'm introducing a short series about using lookup tables to implement neighborhood operations in binary images. ...
presque 18 ans il y a
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Visualizing the output of bwlabel
I often find myself writing small functions that help visualize certain image processing algorithms. For example, my...
presque 18 ans il y a
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Corresponding labeled objects in two images
Several questions I've seen about bwlabel are about finding the correspondences between object labels in two images. ...
presque 18 ans il y a
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Relabeling a label matrix
The three most common questions I've been hearing about bwlabel, which is used for labeling connected components in a...
presque 18 ans il y a
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Reconsidering the impossible
I grabbed the latest issue of IEEE Signal Processing Magazine out of my mailbox the other day. As I was flipping through...
presque 18 ans il y a
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Viewing output-space coordinates for a transformed image
Blog reader Ram asked a question last week that I hear fairly often: When you apply a spatial transformation to an...
environ 18 ans il y a
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bwlabel search order
I've received several questions over the past months about the search order for the function bwlabel and whether it can...
environ 18 ans il y a
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MATLAB 7.6 (R2008a)
When the new releases come out, I like to peruse the release notes for MATLAB. Loren and the Desktop team have already...
environ 18 ans il y a
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Upslope area functions – updated files
For the geoscientists in the audience who are using my upslope area functions, I just updated the files. The update fixes a...
environ 18 ans il y a
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Multidimensional Image Processing
Every so often someone asks in comp.soft-sys.matlab for a "function like Image Processing Toolbox function foobar that...
environ 18 ans il y a
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R2008a
Last week The MathWorks released R2008a, the ninth in a series of six-month releases. (If there's an equinox coming up, look...
environ 18 ans il y a
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Timing code in MATLAB
When we work on improving the speed of image processing functions in MATLAB, we are naturally interested in getting...
environ 18 ans il y a
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Handling comments and e-mail
I would like to announce new procedures for comments on this blog, as well as for associated e-mail traffic. First,...
environ 18 ans il y a
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Neighbor indexing
Earlier this year I wrote about logical indexing and linear indexing. Now I want to finish this little...
environ 18 ans il y a
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Linear indexing
Last week I posted an introduction to logical indexing. This week I want to continue with a brief discussion of linear...
environ 18 ans il y a