Steve on Image Processing

Archive for the ‘Uncategorized’ Category

• R2013a – Looking around in MATLAB
  May 15th, 2013
  
• JPEG and PNG – lossy and lossless image compression
  May 2nd, 2013
  
• Revisiting dctdemo – part 4
  April 12th, 2013
  
• Cluster-based image display
  April 1st, 2013
  
• Revisiting dctdemo – part 3
  March 21st, 2013
  
• MATLAB software testing tools – old and new (R2013a!)
  March 12th, 2013
  
• Revisiting dctdemo – part 2
  February 21st, 2013
  
• Revisiting dctdemo – Part 1
  February 8th, 2013
  
• George Forsythe is inside the default MATLAB image
  January 28th, 2013
  
• Counting objects without bias
  December 18th, 2012
  
• Computer vision and image processing in R2012b
  November 5th, 2012
  
• MATLAB R2012b
  October 16th, 2012
  
• Image processing in Orlando next week (ICIP 2012)
  September 25th, 2012
  
• Detecting Circular Objects in Images
  September 4th, 2012
  
• Wrapping up the analysis of Cody solutions
  August 28th, 2012
  
• Visualizing the floating-point behavior of the point-on-line test
  August 22nd, 2012
  
• Cody problem solvers: simplify a polygon
  July 25th, 2012
  
• A Cody problem: simplify a polygon
  July 9th, 2012
  
• Walking along a path
  July 6th, 2012
  
• How im2html works
  June 28th, 2012
  
• New blog – Cleve’s Corner!
  June 11th, 2012
  
• Making an HTML table of pixel values with colored cells
  June 2nd, 2012
  
• Shuffling label colors
  May 15th, 2012
  
• The DFT matrix and computation time
  May 1st, 2012
  
• And now for something completely different
  April 11th, 2012
  
• imzoneplate on the File Exchange
  April 10th, 2012
  
• Bug reports on mathworks.com – “Fixed in R2012a”
  April 6th, 2012
  
• MATLAB R2012a
  April 3rd, 2012
  
• Image Processing and Computer Vision Updates in R2012a
  March 30th, 2012
  
• Image inpainting using PDE techniques
  March 13th, 2012
  
• Writing a file reader in MATLAB
  February 28th, 2012
  
• Saturday morning fun with Cody
  February 11th, 2012
  
• Jobs and such
  January 31st, 2012
  
• Generating Hilbert curves
  January 25th, 2012
  
• Five years ago: August, September, and October 2006
  January 13th, 2012
  
• Batch processing files in another folder
  December 23rd, 2011
  
• Exploring shortest paths – wrapping up
  December 21st, 2011
  
• Exploring shortest paths – part 5
  December 13th, 2011
  
• Exploring shortest paths – part 4
  December 6th, 2011
  
• Exploring shortest paths – part 3
  December 2nd, 2011
  
• Exploring shortest paths – part 2
  November 26th, 2011
  
• Exploring shortest paths – part 1
  November 1st, 2011
  
• Five years ago: May, June, and July 2006
  October 21st, 2011
  
• Binary image convex hull – algorithm notes
  October 4th, 2011
  
• Binary image convex hull
  September 30th, 2011
  
• Dealing with “Really Big” Images: Image Adapters
  September 23rd, 2011
  
• Engineering education and MATLAB – a personal perspective
  September 20th, 2011
  
• “Area opening” terminology question
  September 2nd, 2011
  
• Blog comments and e-mail
  August 17th, 2011
  
• Dealing with “Really Big” Images: Block Processing
  August 16th, 2011
  
• Dealing with “Really Big” Images: Viewing
  August 5th, 2011
  
• Five years ago: March and April 2006
  August 2nd, 2011
  
• Checkerboard fun
  July 26th, 2011
  
• Filtering fun
  July 22nd, 2011
  
• Jähne test pattern – take 3
  July 19th, 2011
  
• Jähne test pattern – take 2
  July 19th, 2011
  
• Measuring elapsed time in MATLAB
  July 18th, 2011
  
• Jähne test pattern
  July 16th, 2011
  
• Five years ago: January and February 2006
  July 13th, 2011
  
• Binary image hit-miss operator
  July 8th, 2011
  
• Advanced maneuvers with regionprops
  June 21st, 2011
  
• MATLAB R2011a
  June 9th, 2011
  
• More about automatic array growth improvements in MATLAB R2011a
  May 20th, 2011
  
• Automatic array growth gets a lot faster in R2011a
  May 16th, 2011
  
• Video Sudoku Solver
  April 29th, 2011
  
• Computer Vision System Toolbox in R2011a
  April 26th, 2011
  
• Color-based segmentation demo on the File Exchange
  April 23rd, 2011
  
• Exporting GeoTIFF files using Mapping Toolbox in R2011a
  April 18th, 2011
  
• Even more information about the size function
  March 29th, 2011
  
• Too much information about the size function
  March 22nd, 2011
  
• Tips for reading a camera raw file into MATLAB
  March 8th, 2011
  
• Pixel grid
  February 17th, 2011
  
• More on segmenting in a*-b* space
  February 4th, 2011
  
• Research study on testing engineering and scientific software
  January 27th, 2011
  
• Old fogey tales
  January 19th, 2011
  
• Freehand segmentation in the a*-b* plane
  January 11th, 2011
  
• Feature AND
  January 7th, 2011
  
• a* and b*
  December 30th, 2010
  
• Two-Dimensional Histograms
  December 23rd, 2010
  
• What color is green?
  December 17th, 2010
  
• MATLAB Documentation Center search
  December 9th, 2010
  
• R2010b – Image Acquisition Toolbox and Video and Image Processing Blockset
  November 19th, 2010
  
• The mystery of the failing TIFF append loop
  November 9th, 2010
  
• R2010b – MATLAB changes
  November 5th, 2010
  
• R2010b – More Image Processing Toolbox changes
  October 29th, 2010
  
• How long is the coast of Britain?
  October 19th, 2010
  
• R2010b – Image Processing Toolbox performance improvements
  October 15th, 2010
  
• The Two Amigos
  October 8th, 2010
  
• Disconnected component labeling: part 2
  October 7th, 2010
  
• Disconnected component labeling: part 1
  October 1st, 2010
  
• Documentation for previous releases now available online
  September 3rd, 2010
  
• Isotropic dilation using the distance transform
  August 16th, 2010
  
• Visualizing regionprops ellipse measurements
  July 30th, 2010
  
• “DIM” terminology
  June 29th, 2010
  
• MATLAB xUnit 3.0.1
  June 27th, 2010
  
• MATLAB xUnit: new version available
  June 16th, 2010
  
• Goodbye Apple Hill 1!
  June 2nd, 2010
  
• The Fundamental Matrix Song
  May 21st, 2010
  
• Gulf of Mexico oil spill example on Art of MATLAB blog
  May 16th, 2010
  
• Survey on code reuse by MATLAB users
  May 15th, 2010
  
• MathWorks Academic Virtual Conference
  May 4th, 2010
  
• MATLAB Contest
  April 29th, 2010
  
• More R2010a performance improvements in Image Processing Toolbox
  April 23rd, 2010
  
• Performance improvements in R2010a
  April 19th, 2010
  
• More about variable names inside functions
  April 12th, 2010
  
• A practice that doesn’t make me cry
  April 9th, 2010
  
• Is Denoising Dead?
  March 18th, 2010
  
• The DFT and the DTFT
  March 15th, 2010
  
• Updates on old business: upslope area and unit testing
  February 1st, 2010
  
• About the unused-argument syntax in R2009b
  January 11th, 2010
  
• In my mailbox this week: MCALab, astronomy, dmperm, and Sudoku
  January 8th, 2010
  
• Image Enhancement: A Medley
  December 18th, 2009
  
• Extracting dot locations from a graphic
  November 20th, 2009
  
• Maybe truecolor is OK after all
  November 12th, 2009
  
• I’m looking for a replacement for “truecolor”
  November 11th, 2009
  
• Writing TIFF files with given width and resolution
  November 9th, 2009
  
• The conv function and implementation tradeoffs
  November 3rd, 2009
  
• Embedding an ICC profile into a TIFF file
  October 20th, 2009
  
• Faster morphological reconstruction in R2009b
  October 19th, 2009
  
• Friday links
  October 16th, 2009
  
• MATLAB Virtual Conference – “the high point of geekism this year”
  October 15th, 2009
  
• Deploying Image Processing Toolbox apps in R2009b – we goofed
  October 12th, 2009
  
• Friday links
  October 9th, 2009
  
• Release notes for old versions
  October 7th, 2009
  
• MATLAB Virtual Conference on October 14
  October 5th, 2009
  
• Tab completion for imread, imfinfo, and imwrite in R2009b
  October 2nd, 2009
  
• Evolution of logical arrays in MATLAB
  September 18th, 2009
  
• Many steps needed for some color-space conversions
  September 9th, 2009
  
• Functional design clunkers
  August 31st, 2009
  
• Knuth on go to – 1974
  August 27th, 2009
  
• Moving toolbox functions into MATLAB
  August 18th, 2009
  
• Five years of Image Processing Toolbox changes
  July 30th, 2009
  
• Five years of MATLAB changes related to image processing
  July 27th, 2009
  
• Scattered data interpolation in R2009a
  July 24th, 2009
  
• A new look for connected component labeling in R2009a – Part 3
  July 20th, 2009
  
• A chess coach encounters the “300 dpi” mystery
  July 17th, 2009
  
• Computational geometry in MATLAB R2009a
  July 15th, 2009
  
• A new look for connected component labeling in R2009a – Part 2
  July 13th, 2009
  
• A new look for connected component labeling in R2009a
  July 6th, 2009
  
• Getting the MATLAB code from blog posts
  June 15th, 2009
  
• Reminder about comments on this blog
  June 14th, 2009
  
• References on my shelf
  June 12th, 2009
  
• Anticipation
  May 27th, 2009
  
• Learning Lessons from a One-Liner
  May 27th, 2009
  
• Overview window preference in R2009a
  May 18th, 2009
  
• The curveball
  May 16th, 2009
  
• Reproducible research in signal processing
  May 5th, 2009
  
• Multithreaded FFT functions in MATLAB R2009a
  April 17th, 2009
  
• Digital Forensics
  April 6th, 2009
  
• Finding the right level of documentation
  April 3rd, 2009
  
• MATLAB R2009a – imread and multipage TIFFs
  April 2nd, 2009
  
• MTEST update, plus Help Browser integration info
  March 19th, 2009
  
• R2009a – MATLAB updates
  March 18th, 2009
  
• Using ismember with the output of regionprops
  February 27th, 2009
  
• Image overlay using transparency
  February 18th, 2009
  
• Consider multibandread for reading your data
  February 6th, 2009
  
• MTEST – A unit test harness for MATLAB code
  February 3rd, 2009
  
• Have you heard of the “feature transform”?
  January 28th, 2009
  
• A Third Year of Blogging
  January 16th, 2009
  
• Another timeit update
  December 31st, 2008
  
• Soft proofing example
  December 24th, 2008
  
• Online resources: psychophysics, colour engineering
  December 9th, 2008
  
• Color Gamut Mapping
  November 19th, 2008
  
• ICC DevCon 2008
  November 13th, 2008
  
• Image processing code on the File Exchange
  November 7th, 2008
  
• Update to timeit
  November 5th, 2008
  
• MATLAB User Survey
  November 4th, 2008
  
• R2008b
  November 3rd, 2008
  
• Scientific computing survey
  October 16th, 2008
  
• Getting updates on reported bugs
  October 8th, 2008
  
• Recent changes in MATLAB Central blogs
  September 19th, 2008
  
• Independent computation in software tests
  September 11th, 2008
  
• Escher, images, and chess
  September 5th, 2008
  
• Image visualization using transparency
  August 20th, 2008
  
• Filling small holes
  August 5th, 2008
  
• Reading Massively Multipage TIFFs: An Update
  July 30th, 2008
  
• Opening by reconstruction
  July 14th, 2008
  
• Nonlinear operations using imfilter
  July 7th, 2008
  
• False-color visualization of binary image object sets
  June 25th, 2008
  
• Batch processing revisited
  June 17th, 2008
  
• Performance optimization for applylut
  June 13th, 2008
  
• Digital Image Forensics
  May 30th, 2008
  
• Congratulations to Phoenix!
  May 28th, 2008
  
• Lookup tables for binary image processing—Conway’s Game of Life
  May 20th, 2008
  
• Lookup tables for binary image processing—makelut and applylut
  May 13th, 2008
  
• Anti-aliased text in color
  May 9th, 2008
  
• Lookup tables for binary image processing
  May 7th, 2008
  
• Reconsidering the impossible
  April 4th, 2008
  
• MATLAB 7.6 (R2008a)
  March 21st, 2008
  
• Multidimensional Image Processing
  March 17th, 2008
  
• R2008a
  March 7th, 2008
  
• Timing code in MATLAB
  February 29th, 2008
  
• Handling comments and e-mail
  February 25th, 2008
  
• Counting occurrences of image colors
  January 31st, 2008
  
• JPEG: What’s in a name?
  January 29th, 2008
  
• linkaxes
  January 15th, 2008
  
• A Second Year of Blogging
  January 4th, 2008
  
• Cleaning up scanned text – revisited
  December 21st, 2007
  
• METACOW
  December 13th, 2007
  
• Remembering Gene Golub, 1932 – 2007
  December 11th, 2007
  
• Cleaning up scanned text
  December 7th, 2007
  
• GUI debugging video – recommended
  November 29th, 2007
  
• General connectivity
  November 27th, 2007
  
• Classification of operations
  November 19th, 2007
  
• Can you share an MMT with us?
  October 30th, 2007
  
• bwselect
  October 26th, 2007
  
• Finding bright objects
  October 19th, 2007
  
• Category and archive links
  October 12th, 2007
  
• HDR and tone mapping links
  October 5th, 2007
  
• Major image processing product updates
  September 28th, 2007
  
• How many images can fit in a TIFF file?
  September 16th, 2007
  
• ICIP 2007
  September 16th, 2007
  
• R2007b
  September 6th, 2007
  
• Clearing border components
  September 4th, 2007
  
• Intensity-weighted centroids
  August 31st, 2007
  
• Gray scale pixel values in labeled regions
  August 21st, 2007
  
• Filling holes in images
  July 26th, 2007
  
• imoverlay and imagesc
  July 20th, 2007
  
• Cell morphology article in Science magazine
  July 9th, 2007
  
• Image processing in the movies
  July 3rd, 2007
  
• imfinfo, imread can automatically detect the image format
  June 29th, 2007
  
• Finding pixels adjacent to a mask
  June 28th, 2007
  
• Intruder detection example
  June 27th, 2007
  
• Webinar next week: Color Image Processing in MATLAB
  June 22nd, 2007
  
• More info on Photoshop – MATLAB integration
  June 19th, 2007
  
• Border replication option of imfilter
  June 15th, 2007
  
• Image Processing Toolbox bundled with latest student version
  June 6th, 2007
  
• How do you spell “l”?
  May 21st, 2007
  
• New Student Version of MATLAB & Simulink
  April 10th, 2007
  
• Photoshop CS3 Extended – and MATLAB
  April 5th, 2007
  
• Neighbor indexing
  March 28th, 2007
  
• New MATLAB Desktop Blog
  March 22nd, 2007
  
• Computing distance using image file information
  March 16th, 2007
  
• What happened to isgray, isind, isbw, and isrgb?
  March 9th, 2007
  
• R2007a
  March 2nd, 2007
  
• ROIPOLY – rectangular regions and logical indexing
  February 24th, 2007
  
• Costas arrays
  February 15th, 2007
  
• Antialiased polygon scan conversion: Are you interested?
  February 6th, 2007
  
• Seen on the web
  February 2nd, 2007
  
• A Year of Blogging
  January 15th, 2007
  
• Superimposing line plots on images
  January 1st, 2007
  
• B = “Profile Connection Space”
  December 29th, 2006
  
• Colorful anniversaries in 2006
  December 26th, 2006
  
• POLY2MASK and ROIPOLY – Part 3
  December 22nd, 2006
  
• B = PCS
  December 20th, 2006
  
• Image processing tools on the MATLAB Central File Exchange
  December 15th, 2006
  
• Getting MATLAB code from blog postings – An update
  December 15th, 2006
  
• POLY2MASK and ROIPOLY – Part 2
  December 13th, 2006
  
• Seen on the Web: Bilateral filtering in MATLAB
  December 7th, 2006
  
• POLY2MASK and ROIPOLY – Part 1
  December 5th, 2006
  
• 3-D blood vessel tracing
  December 1st, 2006
  
• Separable convolution: Part 2
  November 28th, 2006
  
• Tetrahedral interpolation for colorspace conversion
  November 24th, 2006
  
• Old habits
  November 21st, 2006
  
• Labeling labeled objects
  November 17th, 2006
  
• Bit slices
  October 25th, 2006
  
• Nonflat grayscale dilation and erosion
  October 23rd, 2006
  
• Software development tools for engineers
  October 22nd, 2006
  
• Getting MATLAB code from blog postings
  October 20th, 2006
  
• Hough transform coordinate system
  October 19th, 2006
  
• The Story Behind the MATLAB Default Image
  October 17th, 2006
  
• Separable convolution
  October 4th, 2006
  
• Dilation, erosion, and the morphological gradient
  September 25th, 2006
  
• Unusual red-eye reduction technique
  September 20th, 2006
  
• ICIP 2006
  September 6th, 2006
  
• R2006b
  September 6th, 2006
  
• Showing image pixels associated with a Hough transform bin
  September 1st, 2006
  
• Discrete cosine transforms, JPEG, and software compatibility
  August 11th, 2006
  
• GUI programming questions
  July 25th, 2006
  
• Seen on the web: MATLAB example for tracing and measuring skin lesions
  July 14th, 2006
  
• Input from tech support
  July 11th, 2006
  
• More from CGIV
  June 20th, 2006
  
• Hue shifts near the L*=0 axis
  June 19th, 2006
  
• European colour
  June 16th, 2006
  
• Determining point positions in MRI peg phantom
  June 10th, 2006
  
• Batch processing
  June 6th, 2006
  
• Cell segmentation
  June 2nd, 2006
  
• A little deadline pressure
  May 31st, 2006
  
• A Lab-based uniform color scale
  May 9th, 2006
  
• Fast local sums
  May 2nd, 2006
  
• Quick tip: Determining uniqueness of local maximum
  April 10th, 2006
  
• Upcoming optimizations in the Image Processing Toolbox
  April 1st, 2006
  
• Image overlays
  March 28th, 2006
  
• Quick tip: Use the functions true and false
  March 15th, 2006
  
• Getting notified about new blog posts
  March 10th, 2006
  
• MathWorks product release: R2006a
  March 6th, 2006
  
• Help! My publisher wants a 300 dpi TIFF
  March 3rd, 2006
  
• Tracing George
  February 21st, 2006
  
• Resetting my expectations: What do users know about new product features?
  February 16th, 2006
  
• Comment policies
  January 23rd, 2006
  
• DIMES on Mars
  January 20th, 2006
  
• MATLAB’s publish function
  January 17th, 2006
  
• More about meshgrid
  January 16th, 2006
  
• Synthesizing images using simple equations
  January 13th, 2006
  
• Welcome!
  January 6th, 2006