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Steve on Image Processing


Steve Eddins manages the Image & Geospatial development team at The MathWorks and coauthored Digital Image Processing Using MATLAB. He writes here about image processing concepts, algorithm implementations, and MATLAB.

  • Assaf: Hi, I have 3 questions regarding the following sentence: “Rather than using the power spectrum from a...
  • Steve: Cara—I do not understand your question. Can you clarify it?
  • Cara Schiek: Hi. How could I do this same thing with image vales within the patches? cara
  • Steve: Vincent—OK, thanks for the information.
  • Vincent: My only data point on multithreading is that the Performance tab of the Task Manager shows increased CPU...
  • Steve: Vincent—Thanks for giving it a try and reporting back. I’m a bit skeptical that multithreading...
  • Vincent: Oops numbers were wrong. Data set was 450MB large so the numbers are: Results: ImageJ alone =< 5 s (or 90...
  • Vincent: Steve- I just had a quick run at the new imread.m patch. It’s much faster than the previous version...
  • Steve: Erik—Also, separability of the kernel provides no speed benefit in FFT-based implementations....
  • Steve: Erik—Good questions. Remember that, practically speaking, when we filter a 2-D signal with a 1-D filter...

These postings are the author's and don't necessarily represent the opinions of The MathWorks.

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