Comments on: Costas arrays https://blogs.mathworks.com/steve/2007/02/15/costas-arrays/?s_tid=feedtopost Retired from MathWorks in 2024 after 30 years of service. Can now be found at MATLAB Central, https://hornjourney.com, and https://matrixvalues.com. MathWorks career included image processing, toolbox development, MATLAB development and design, development team management, MATLAB design standards, Steve on Image Processing blog (https://blogs.mathworks.com/steve). Co-author of Digital Image Processing Using MATLAB (https://www.imageprocessingplace.com/DIPUM-3E/dipum3e_main_page.htm). French horn enthusiast, member of Concord Orchestra and Melrose Symphony, member of the board of Cormont Music and the Kendall Betts Horn Camp. Wed, 23 Oct 2019 12:41:49 +0000 hourly 1 https://wordpress.org/?v=6.2.2 By: Steve Eddins https://blogs.mathworks.com/steve/2007/02/15/costas-arrays/#comment-24775 Tue, 03 Jan 2012 12:54:27 +0000 https://blogs.mathworks.com/steve/?p=115#comment-24775 Jahnavi—I don’t know. I suggest you follow the link at the bottom of the post to see if there is any useful information there.

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By: jahnavi https://blogs.mathworks.com/steve/2007/02/15/costas-arrays/#comment-24774 Tue, 03 Jan 2012 06:58:52 +0000 https://blogs.mathworks.com/steve/?p=115#comment-24774 sir please tell is costas code can exits for N=10 if possible can you give the code.

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By: Steve https://blogs.mathworks.com/steve/2007/02/15/costas-arrays/#comment-19924 Thu, 07 Feb 2008 19:06:43 +0000 https://blogs.mathworks.com/steve/?p=115#comment-19924 Scott—Thanks. That link is already at the bottom of my post.

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By: Steve https://blogs.mathworks.com/steve/2007/02/15/costas-arrays/#comment-15193 Sun, 18 Nov 2007 21:55:39 +0000 https://blogs.mathworks.com/steve/?p=115#comment-15193 Varma—This post contains about everything I know about Costas arrays. I suggest that you follow the link at the end of the post to find some papers and examples.

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By: varma https://blogs.mathworks.com/steve/2007/02/15/costas-arrays/#comment-14982 Wed, 14 Nov 2007 08:22:42 +0000 https://blogs.mathworks.com/steve/?p=115#comment-14982 hai steve,
congrats for maintainig a good blog.steve i want few costas sequences for N=8 and 10. could you help me out in this regard

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By: Steve https://blogs.mathworks.com/steve/2007/02/15/costas-arrays/#comment-6856 Wed, 11 Jul 2007 13:27:53 +0000 https://blogs.mathworks.com/steve/?p=115#comment-6856 Simon—Thanks for the information.

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By: Simon M. https://blogs.mathworks.com/steve/2007/02/15/costas-arrays/#comment-6855 Wed, 11 Jul 2007 09:23:02 +0000 https://blogs.mathworks.com/steve/?p=115#comment-6855 Hello, Steve.
Right now we are using the matlab function poly2mask to intersect different drainage areas/patches with image pixels of a rain radar (e.g. 200×200 pixel, 1km² rastersize).
Those patches are available as dxf-polygones, the radar information is represented by greyscale images.
Since every patch is covered by only 20-30 radar pixels we would like to calculate the exact amount of rainfall for a patch. Nevertheless we are achieving quite good results with the existing poly2mask method.

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By: Steve https://blogs.mathworks.com/steve/2007/02/15/costas-arrays/#comment-6834 Wed, 04 Jul 2007 03:24:08 +0000 https://blogs.mathworks.com/steve/?p=115#comment-6834 Simon—This post and my February 6th post are about a possible method for computing partial pixel coverage. I asked whether anyone was interested. We would like to hear about your use case. Can you describe the scenario in which you’d like to be able to compute this information? What kind of data, where did it come from, how will partial pixel coverage be used? What trouble does it cause if this algorithm is not available?

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By: Simon M. https://blogs.mathworks.com/steve/2007/02/15/costas-arrays/#comment-6824 Tue, 03 Jul 2007 14:31:35 +0000 https://blogs.mathworks.com/steve/?p=115#comment-6824 Hello, Steve. I’m looking for an easy way to calculate for a given polygon (type uint8 or double) for each pixel not only if it lies in the polygon, but also the coverage, e.g. something like 0.65 of a pixel is covered by the polygon.
Do you know any matlab algorithms, which might help me.
Thanks in Advance,
Simon

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By: Steve https://blogs.mathworks.com/steve/2007/02/15/costas-arrays/#comment-6629 Thu, 29 Mar 2007 15:22:02 +0000 https://blogs.mathworks.com/steve/?p=115#comment-6629 A – I posed your question to graphics developer Mike, who first told me about Costas arrays. He pointed out that the success of an antialiasing method depends on properties of human visual perception, and so mathematical measures of optimality tend to be not very helpful. In his experience, “sampling patterns have often been chosen in pretty ad hoc ways with little concern for the underlying math.” He suggests looking through Solomon Golomb’s papersfor information about the mathematical properties of Costas arrays.

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