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ashishuthama

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Show HN: Optical Design and Simulation in Matlab

2pts0

'lobbing things' i.e launching things, OP didnt mean it would reach there in 30 days.

@ExAr - A treasure trove of information, thanks for putting in the effort!

Do you blog about how you go about creating these graphics? For example, this view finder image: https://exclusivearchitecture.com/images/technical-articles/... looks very impressive!

How do you simulate the rays+eye?

same here. Was excited to see "Knot of the Day", thought I could add that to my RSS reader and look at one each day..could not find a way to do that.

A new engineer can learn a lot from being on code reviews earlyon. Anything from the team coding style to the application architecture.

Another data point: MATLAB, glnxa64 AVX2, 12 core

> maxNumCompThreads(1);
> im = randi(255, [2560, 1600, 3],'uint8');
> timeit(@()imresize(im,[320,200],'bilinear','Antialiasing',false))

ans =

    0.0083

>> timeit(@()imresize(im,[320,200],'bilinear'))

ans =

    0.0301

>> maxNumCompThreads(6);

> timeit(@()imresize(im,[320,200],'bilinear','Antialiasing',false))

ans =

    0.0062

>> timeit(@()imresize(im,[320,200],'bilinear'))

ans =

    0.0113

Oh, missed that lanczos2 part:

> maxNumCompThreads(1);
> timeit(@()imresize(im,[320,200],'lanczos2','Antialiasing',false))

ans =

    0.0146

>> maxNumCompThreads(6);

> timeit(@()imresize(im,[320,200],'lanczos2','Antialiasing',false))

ans =

    0.0049

Since MATLAB tries to do most of the computation in double precision, its harder to extract much from SIMD.